| 19006 | 2025-11-15 21:02:19 | gortomi | Páros részgráfok | cpp17 | Accepted 100/100 | 953ms | 10928 KiB |
#include <bits/stdc++.h>
using namespace std;
//#define int long long
using ll = long long;
using pii = pair<int, int>;
#define fi first
#define se second
int n, m;
int wr = 0;
int tr = 0;
vector<pii> v;
vector<int> p;
vector<int> s;
int get(int v)
{
return p[v] == 0 ? v : get(p[v]);
}
void unio(int a, int b)
{
a = get(a);
b = get(b);
if(a != b)
{
if(s[a] < s[b]) swap(a, b);
v.push_back({b, a});
p[b] = a;
s[a] += s[b];
}
else
{
v.push_back({0, 0});
}
}
void edge(pair<int, int> a)
{
//tr++;
unio(a.fi, a.se + n);
unio(a.fi + n, a.se);
if(get(a.fi + n) == get(a.fi))
{
wr++;
v.push_back({-1, 0});
}
}
void rollback()
{
//tr--;
for(int i = 0; i < 2; i++)
{
while(v.back().fi == -1)
{
v.pop_back();
wr--;
}
auto [b, a] = v.back();
v.pop_back();
s[a] -= s[b];
p[b] = 0;
}
}
int l, r;
const int e = 20;
int bmax = -1;
vector<pair<int, int> > fr(e, {0, -1}), ba(e, {0, -1});
vector<pair<int, int> > a;
void ad()
{
int siz = 0;
while(fr[siz].fi != 0) siz++;
int w = (1 << siz) - 1;
for(int i = 0; i <= siz; i++)
{
fr[i] = {0, -1};
if(ba[i].fi != 0) w += (1 << i);
}
for(int i = 0; i < w; i++)
{
rollback();
}
if(bmax < siz)
{
ba[siz] = {r - (1 << siz) + 1, r};
bmax = siz;
}
else fr[siz] = {r - (1 << siz) + 1, r};
for(int i = siz; i >= 0; i--)
{
for(int j = fr[i].fi; j <= fr[i].se; j++)
{
edge(a[j]);
}
for(int j = ba[i].fi; j <= ba[i].se; j++)
{
edge(a[j]);
}
}
}
void rem()
{
int siz = 0;
while(ba[siz].fi == 0) siz++;
int w = 0;
for(int i = 0; i < siz; i++)
{
if(fr[i].fi != 0) w += (1 << i);
ba[i] = {l + (1 << i) - 1, l + (1 << (i + 1)) - 2};
}
w += (1 << siz);
//cout << w << " " << tr << endl;
for(int i = 0; i < w; i++) rollback();
ba[siz] = {0, -1};
if(bmax == siz)
{
if(fr[siz].fi != 0)
{
ba[siz] = fr[siz];
fr[siz] = {0, -1};
}
else bmax--;
}
for(int i = siz - 1; i >= 0; i--)
{
for(int j = fr[i].fi; j <= fr[i].se; j++)
{
edge(a[j]);
}
for(int j = ba[i].fi; j <= ba[i].se; j++)
{
edge(a[j]);
}
}
}
void solve()
{
cin >> n >> m;
p.resize(2 * n + 1);
s.resize(2 * n + 1, 1);
a.resize(m + 1);
for(int i = 1; i <= m; i++)
{
cin >> a[i].fi >> a[i].se;
}
l = 1;
ll ans = 0;
for(r = 1; r <= m; r++)
{
ad();
/*
cout << r << " " << tr << endl;
for(int j = 0; j < e; j++)
{
if(fr[j].fi != 0) cout << fr[j].fi << " . " << fr[j].se << endl;
if(ba[j].fi != 0) cout << ba[j].fi << " x " << ba[j].se << endl;
}
*/
while(wr > 0)
{
l++;
rem();
//cout << l << endl;
//cout << "ok" << endl;
}
ans += r - l + 1;
//cout << l << " " << r << endl;
}
cout << ans << "\n";
}
signed main()
{
ios::sync_with_stdio(0);
cin.tie(0);
int te = 1;
//cin >> te;
while(te--) solve();
}
| Subtask | Sum | Test | Verdict | Time | Memory | ||
|---|---|---|---|---|---|---|---|
| subtask1 | 0/0 | ||||||
| 1 | Accepted | 1ms | 316 KiB | ||||
| 2 | Accepted | 1ms | 316 KiB | ||||
| subtask2 | 10/10 | ||||||
| 3 | Accepted | 1ms | 316 KiB | ||||
| 4 | Accepted | 1ms | 316 KiB | ||||
| 5 | Accepted | 1ms | 316 KiB | ||||
| 6 | Accepted | 1ms | 316 KiB | ||||
| 7 | Accepted | 1ms | 316 KiB | ||||
| 8 | Accepted | 1ms | 316 KiB | ||||
| 9 | Accepted | 1ms | 316 KiB | ||||
| 10 | Accepted | 1ms | 316 KiB | ||||
| 11 | Accepted | 1ms | 316 KiB | ||||
| 12 | Accepted | 1ms | 316 KiB | ||||
| subtask3 | 7/7 | ||||||
| 13 | Accepted | 1ms | 316 KiB | ||||
| 14 | Accepted | 1ms | 316 KiB | ||||
| 15 | Accepted | 1ms | 316 KiB | ||||
| 16 | Accepted | 1ms | 316 KiB | ||||
| 17 | Accepted | 1ms | 316 KiB | ||||
| 18 | Accepted | 1ms | 316 KiB | ||||
| 19 | Accepted | 1ms | 316 KiB | ||||
| 20 | Accepted | 1ms | 316 KiB | ||||
| 21 | Accepted | 1ms | 316 KiB | ||||
| 22 | Accepted | 1ms | 316 KiB | ||||
| 23 | Accepted | 1ms | 368 KiB | ||||
| 24 | Accepted | 1ms | 316 KiB | ||||
| 25 | Accepted | 1ms | 316 KiB | ||||
| 26 | Accepted | 1ms | 316 KiB | ||||
| 27 | Accepted | 1ms | 316 KiB | ||||
| 28 | Accepted | 1ms | 316 KiB | ||||
| 29 | Accepted | 1ms | 316 KiB | ||||
| 30 | Accepted | 1ms | 316 KiB | ||||
| 31 | Accepted | 1ms | 316 KiB | ||||
| 32 | Accepted | 1ms | 316 KiB | ||||
| subtask4 | 10/10 | ||||||
| 33 | Accepted | 1ms | 316 KiB | ||||
| 34 | Accepted | 1ms | 316 KiB | ||||
| 35 | Accepted | 1ms | 316 KiB | ||||
| 36 | Accepted | 1ms | 316 KiB | ||||
| 37 | Accepted | 1ms | 316 KiB | ||||
| 38 | Accepted | 1ms | 316 KiB | ||||
| 39 | Accepted | 1ms | 316 KiB | ||||
| 40 | Accepted | 1ms | 316 KiB | ||||
| 41 | Accepted | 1ms | 316 KiB | ||||
| 42 | Accepted | 1ms | 316 KiB | ||||
| 43 | Accepted | 1ms | 368 KiB | ||||
| 44 | Accepted | 1ms | 316 KiB | ||||
| 45 | Accepted | 1ms | 316 KiB | ||||
| 46 | Accepted | 1ms | 316 KiB | ||||
| 47 | Accepted | 1ms | 316 KiB | ||||
| 48 | Accepted | 1ms | 316 KiB | ||||
| 49 | Accepted | 1ms | 316 KiB | ||||
| 50 | Accepted | 1ms | 316 KiB | ||||
| 51 | Accepted | 1ms | 316 KiB | ||||
| 52 | Accepted | 1ms | 316 KiB | ||||
| 53 | Accepted | 2ms | 500 KiB | ||||
| 54 | Accepted | 2ms | 316 KiB | ||||
| 55 | Accepted | 1ms | 316 KiB | ||||
| 56 | Accepted | 2ms | 316 KiB | ||||
| 57 | Accepted | 2ms | 316 KiB | ||||
| 58 | Accepted | 2ms | 316 KiB | ||||
| 59 | Accepted | 2ms | 316 KiB | ||||
| 60 | Accepted | 1ms | 316 KiB | ||||
| 61 | Accepted | 1ms | 316 KiB | ||||
| 62 | Accepted | 1ms | 316 KiB | ||||
| subtask5 | 20/20 | ||||||
| 63 | Accepted | 1ms | 316 KiB | ||||
| 64 | Accepted | 1ms | 316 KiB | ||||
| 65 | Accepted | 1ms | 316 KiB | ||||
| 66 | Accepted | 1ms | 316 KiB | ||||
| 67 | Accepted | 1ms | 316 KiB | ||||
| 68 | Accepted | 1ms | 316 KiB | ||||
| 69 | Accepted | 1ms | 316 KiB | ||||
| 70 | Accepted | 1ms | 316 KiB | ||||
| 71 | Accepted | 1ms | 316 KiB | ||||
| 72 | Accepted | 1ms | 316 KiB | ||||
| 73 | Accepted | 1ms | 368 KiB | ||||
| 74 | Accepted | 1ms | 316 KiB | ||||
| 75 | Accepted | 1ms | 316 KiB | ||||
| 76 | Accepted | 1ms | 316 KiB | ||||
| 77 | Accepted | 1ms | 316 KiB | ||||
| 78 | Accepted | 1ms | 316 KiB | ||||
| 79 | Accepted | 1ms | 316 KiB | ||||
| 80 | Accepted | 1ms | 316 KiB | ||||
| 81 | Accepted | 1ms | 316 KiB | ||||
| 82 | Accepted | 1ms | 316 KiB | ||||
| 83 | Accepted | 2ms | 500 KiB | ||||
| 84 | Accepted | 2ms | 316 KiB | ||||
| 85 | Accepted | 1ms | 316 KiB | ||||
| 86 | Accepted | 2ms | 316 KiB | ||||
| 87 | Accepted | 2ms | 316 KiB | ||||
| 88 | Accepted | 2ms | 316 KiB | ||||
| 89 | Accepted | 2ms | 316 KiB | ||||
| 90 | Accepted | 1ms | 316 KiB | ||||
| 91 | Accepted | 1ms | 316 KiB | ||||
| 92 | Accepted | 1ms | 316 KiB | ||||
| 93 | Accepted | 32ms | 1160 KiB | ||||
| 94 | Accepted | 41ms | 1508 KiB | ||||
| 95 | Accepted | 12ms | 1088 KiB | ||||
| 96 | Accepted | 43ms | 1480 KiB | ||||
| 97 | Accepted | 12ms | 1080 KiB | ||||
| 98 | Accepted | 37ms | 1696 KiB | ||||
| 99 | Accepted | 35ms | 1676 KiB | ||||
| 100 | Accepted | 32ms | 1784 KiB | ||||
| 101 | Accepted | 32ms | 1200 KiB | ||||
| 102 | Accepted | 39ms | 1712 KiB | ||||
| subtask6 | 14/14 | ||||||
| 103 | Accepted | 1ms | 316 KiB | ||||
| 104 | Accepted | 1ms | 316 KiB | ||||
| 105 | Accepted | 1ms | 316 KiB | ||||
| 106 | Accepted | 1ms | 316 KiB | ||||
| 107 | Accepted | 1ms | 316 KiB | ||||
| 108 | Accepted | 1ms | 316 KiB | ||||
| 109 | Accepted | 1ms | 316 KiB | ||||
| 110 | Accepted | 1ms | 316 KiB | ||||
| 111 | Accepted | 1ms | 316 KiB | ||||
| 112 | Accepted | 1ms | 316 KiB | ||||
| 113 | Accepted | 1ms | 368 KiB | ||||
| 114 | Accepted | 1ms | 316 KiB | ||||
| 115 | Accepted | 1ms | 316 KiB | ||||
| 116 | Accepted | 1ms | 316 KiB | ||||
| 117 | Accepted | 1ms | 316 KiB | ||||
| 118 | Accepted | 1ms | 316 KiB | ||||
| 119 | Accepted | 1ms | 316 KiB | ||||
| 120 | Accepted | 1ms | 316 KiB | ||||
| 121 | Accepted | 1ms | 316 KiB | ||||
| 122 | Accepted | 1ms | 316 KiB | ||||
| 123 | Accepted | 2ms | 500 KiB | ||||
| 124 | Accepted | 2ms | 316 KiB | ||||
| 125 | Accepted | 1ms | 316 KiB | ||||
| 126 | Accepted | 2ms | 316 KiB | ||||
| 127 | Accepted | 2ms | 316 KiB | ||||
| 128 | Accepted | 2ms | 316 KiB | ||||
| 129 | Accepted | 2ms | 316 KiB | ||||
| 130 | Accepted | 1ms | 316 KiB | ||||
| 131 | Accepted | 1ms | 316 KiB | ||||
| 132 | Accepted | 1ms | 316 KiB | ||||
| 133 | Accepted | 32ms | 1160 KiB | ||||
| 134 | Accepted | 41ms | 1508 KiB | ||||
| 135 | Accepted | 12ms | 1088 KiB | ||||
| 136 | Accepted | 43ms | 1480 KiB | ||||
| 137 | Accepted | 12ms | 1080 KiB | ||||
| 138 | Accepted | 37ms | 1696 KiB | ||||
| 139 | Accepted | 35ms | 1676 KiB | ||||
| 140 | Accepted | 32ms | 1784 KiB | ||||
| 141 | Accepted | 32ms | 1200 KiB | ||||
| 142 | Accepted | 39ms | 1712 KiB | ||||
| 143 | Accepted | 70ms | 1880 KiB | ||||
| 144 | Accepted | 68ms | 2772 KiB | ||||
| 145 | Accepted | 72ms | 2996 KiB | ||||
| 146 | Accepted | 70ms | 1972 KiB | ||||
| 147 | Accepted | 24ms | 1844 KiB | ||||
| 148 | Accepted | 92ms | 2476 KiB | ||||
| 149 | Accepted | 85ms | 2996 KiB | ||||
| 150 | Accepted | 74ms | 3008 KiB | ||||
| 151 | Accepted | 93ms | 2484 KiB | ||||
| 152 | Accepted | 71ms | 1988 KiB | ||||
| subtask7 | 20/20 | ||||||
| 153 | Accepted | 1ms | 316 KiB | ||||
| 154 | Accepted | 1ms | 316 KiB | ||||
| 155 | Accepted | 1ms | 316 KiB | ||||
| 156 | Accepted | 1ms | 316 KiB | ||||
| 157 | Accepted | 1ms | 316 KiB | ||||
| 158 | Accepted | 1ms | 316 KiB | ||||
| 159 | Accepted | 1ms | 316 KiB | ||||
| 160 | Accepted | 1ms | 316 KiB | ||||
| 161 | Accepted | 1ms | 316 KiB | ||||
| 162 | Accepted | 1ms | 316 KiB | ||||
| 163 | Accepted | 1ms | 368 KiB | ||||
| 164 | Accepted | 1ms | 316 KiB | ||||
| 165 | Accepted | 1ms | 316 KiB | ||||
| 166 | Accepted | 1ms | 316 KiB | ||||
| 167 | Accepted | 1ms | 316 KiB | ||||
| 168 | Accepted | 1ms | 316 KiB | ||||
| 169 | Accepted | 1ms | 316 KiB | ||||
| 170 | Accepted | 1ms | 316 KiB | ||||
| 171 | Accepted | 1ms | 316 KiB | ||||
| 172 | Accepted | 1ms | 316 KiB | ||||
| 173 | Accepted | 2ms | 500 KiB | ||||
| 174 | Accepted | 2ms | 316 KiB | ||||
| 175 | Accepted | 1ms | 316 KiB | ||||
| 176 | Accepted | 2ms | 316 KiB | ||||
| 177 | Accepted | 2ms | 316 KiB | ||||
| 178 | Accepted | 2ms | 316 KiB | ||||
| 179 | Accepted | 2ms | 316 KiB | ||||
| 180 | Accepted | 1ms | 316 KiB | ||||
| 181 | Accepted | 1ms | 316 KiB | ||||
| 182 | Accepted | 1ms | 316 KiB | ||||
| 183 | Accepted | 32ms | 1160 KiB | ||||
| 184 | Accepted | 41ms | 1508 KiB | ||||
| 185 | Accepted | 12ms | 1088 KiB | ||||
| 186 | Accepted | 43ms | 1480 KiB | ||||
| 187 | Accepted | 12ms | 1080 KiB | ||||
| 188 | Accepted | 37ms | 1696 KiB | ||||
| 189 | Accepted | 35ms | 1676 KiB | ||||
| 190 | Accepted | 32ms | 1784 KiB | ||||
| 191 | Accepted | 32ms | 1200 KiB | ||||
| 192 | Accepted | 39ms | 1712 KiB | ||||
| 193 | Accepted | 70ms | 1880 KiB | ||||
| 194 | Accepted | 68ms | 2772 KiB | ||||
| 195 | Accepted | 72ms | 2996 KiB | ||||
| 196 | Accepted | 70ms | 1972 KiB | ||||
| 197 | Accepted | 24ms | 1844 KiB | ||||
| 198 | Accepted | 92ms | 2476 KiB | ||||
| 199 | Accepted | 85ms | 2996 KiB | ||||
| 200 | Accepted | 74ms | 3008 KiB | ||||
| 201 | Accepted | 93ms | 2484 KiB | ||||
| 202 | Accepted | 71ms | 1988 KiB | ||||
| 203 | Accepted | 122ms | 3108 KiB | ||||
| 204 | Accepted | 119ms | 4968 KiB | ||||
| 205 | Accepted | 136ms | 4780 KiB | ||||
| 206 | Accepted | 122ms | 2992 KiB | ||||
| 207 | Accepted | 39ms | 2808 KiB | ||||
| 208 | Accepted | 170ms | 3752 KiB | ||||
| 209 | Accepted | 172ms | 4960 KiB | ||||
| 210 | Accepted | 146ms | 4960 KiB | ||||
| 211 | Accepted | 185ms | 3940 KiB | ||||
| 212 | Accepted | 123ms | 2992 KiB | ||||
| subtask8 | 19/19 | ||||||
| 213 | Accepted | 1ms | 316 KiB | ||||
| 214 | Accepted | 1ms | 500 KiB | ||||
| 215 | Accepted | 1ms | 316 KiB | ||||
| 216 | Accepted | 1ms | 316 KiB | ||||
| 217 | Accepted | 1ms | 316 KiB | ||||
| 218 | Accepted | 1ms | 316 KiB | ||||
| 219 | Accepted | 1ms | 316 KiB | ||||
| 220 | Accepted | 1ms | 316 KiB | ||||
| 221 | Accepted | 1ms | 316 KiB | ||||
| 222 | Accepted | 1ms | 316 KiB | ||||
| 223 | Accepted | 1ms | 316 KiB | ||||
| 224 | Accepted | 1ms | 316 KiB | ||||
| 225 | Accepted | 1ms | 368 KiB | ||||
| 226 | Accepted | 1ms | 316 KiB | ||||
| 227 | Accepted | 1ms | 316 KiB | ||||
| 228 | Accepted | 1ms | 316 KiB | ||||
| 229 | Accepted | 1ms | 316 KiB | ||||
| 230 | Accepted | 1ms | 316 KiB | ||||
| 231 | Accepted | 1ms | 316 KiB | ||||
| 232 | Accepted | 1ms | 316 KiB | ||||
| 233 | Accepted | 1ms | 316 KiB | ||||
| 234 | Accepted | 1ms | 316 KiB | ||||
| 235 | Accepted | 2ms | 500 KiB | ||||
| 236 | Accepted | 2ms | 316 KiB | ||||
| 237 | Accepted | 1ms | 316 KiB | ||||
| 238 | Accepted | 2ms | 316 KiB | ||||
| 239 | Accepted | 2ms | 316 KiB | ||||
| 240 | Accepted | 2ms | 316 KiB | ||||
| 241 | Accepted | 2ms | 316 KiB | ||||
| 242 | Accepted | 1ms | 316 KiB | ||||
| 243 | Accepted | 1ms | 316 KiB | ||||
| 244 | Accepted | 1ms | 316 KiB | ||||
| 245 | Accepted | 32ms | 1160 KiB | ||||
| 246 | Accepted | 41ms | 1508 KiB | ||||
| 247 | Accepted | 12ms | 1088 KiB | ||||
| 248 | Accepted | 43ms | 1480 KiB | ||||
| 249 | Accepted | 12ms | 1080 KiB | ||||
| 250 | Accepted | 37ms | 1696 KiB | ||||
| 251 | Accepted | 35ms | 1676 KiB | ||||
| 252 | Accepted | 32ms | 1784 KiB | ||||
| 253 | Accepted | 32ms | 1200 KiB | ||||
| 254 | Accepted | 39ms | 1712 KiB | ||||
| 255 | Accepted | 70ms | 1880 KiB | ||||
| 256 | Accepted | 68ms | 2772 KiB | ||||
| 257 | Accepted | 72ms | 2996 KiB | ||||
| 258 | Accepted | 70ms | 1972 KiB | ||||
| 259 | Accepted | 24ms | 1844 KiB | ||||
| 260 | Accepted | 92ms | 2476 KiB | ||||
| 261 | Accepted | 85ms | 2996 KiB | ||||
| 262 | Accepted | 74ms | 3008 KiB | ||||
| 263 | Accepted | 93ms | 2484 KiB | ||||
| 264 | Accepted | 71ms | 1988 KiB | ||||
| 265 | Accepted | 122ms | 3108 KiB | ||||
| 266 | Accepted | 119ms | 4968 KiB | ||||
| 267 | Accepted | 136ms | 4780 KiB | ||||
| 268 | Accepted | 122ms | 2992 KiB | ||||
| 269 | Accepted | 39ms | 2808 KiB | ||||
| 270 | Accepted | 170ms | 3752 KiB | ||||
| 271 | Accepted | 172ms | 4960 KiB | ||||
| 272 | Accepted | 146ms | 4960 KiB | ||||
| 273 | Accepted | 185ms | 3940 KiB | ||||
| 274 | Accepted | 123ms | 2992 KiB | ||||
| 275 | Accepted | 549ms | 10912 KiB | ||||
| 276 | Accepted | 790ms | 10920 KiB | ||||
| 277 | Accepted | 546ms | 10928 KiB | ||||
| 278 | Accepted | 792ms | 10908 KiB | ||||
| 279 | Accepted | 953ms | 8876 KiB | ||||
| 280 | Accepted | 485ms | 8792 KiB | ||||
| 281 | Accepted | 782ms | 10920 KiB | ||||
| 282 | Accepted | 791ms | 10916 KiB | ||||
| 283 | Accepted | 714ms | 10916 KiB | ||||
| 284 | Accepted | 544ms | 10920 KiB | ||||