| 10774 | 2024-04-11 18:41:18 | mraron | Metróutasok | cpp17 | Accepted 100/100 | 57ms | 7120 KiB |
#include <iostream>
#include <vector>
#include <numeric>
using namespace std;
using ll = long long;
int N;
vector<int> a;
ll solvemin() {
auto chk = [&](ll lim) -> bool {
ll mn = 0ll, mx = 0ll;
for (int i=1; i<=N; ++i) {
ll pmn = mn;
if (mn >= a[i])
mn -= a[i];
else if (mx < a[i])
mn = a[i]-mx;
else
mn = (mn+a[i]) % 2;
if (mx+a[i] <= lim) mx += a[i];
else {
ll rem = lim-pmn;
if ((pmn+a[i] <= lim) || (a[i] <= mx+lim))
mx = lim - (rem+a[i])%2;
else return false;
}
}
return (mn==0);
};
ll lo = 0, hi = accumulate(a.begin(), a.end(), 0ll);
while (lo+1 < hi) {
ll mid = (lo+hi)/2;
if (chk(mid))
hi = mid;
else
lo = mid;
}
return hi;
}
ll solvemax() {
vector<ll> pref(N+1, 0ll);
for (int i=1; i<=N; ++i)
pref[i] = pref[i-1] + (ll)a[i];
ll ans = 0ll, tot = 0ll;
for (int i=N; i>0; --i) {
tot += a[i];
ans = max(ans, min(pref[i-1], tot));
}
return ans;
}
int main() {
ios::sync_with_stdio(false);
cin >> N;
a.assign(N+1, 0);
for (int i=1; i<=N; ++i)
cin >> a[i];
cout << solvemin() << endl;
cout << solvemax() << endl;
return 0;
}
| Subtask | Sum | Test | Verdict | Time | Memory | ||
|---|---|---|---|---|---|---|---|
| subtask1 | 0/0 | ||||||
| 1 | Accepted | 3ms | 2040 KiB | ||||
| 2 | Accepted | 57ms | 4436 KiB | ||||
| subtask2 | 12/12 | ||||||
| 3 | Accepted | 3ms | 2268 KiB | ||||
| 4 | Accepted | 3ms | 2356 KiB | ||||
| 5 | Accepted | 3ms | 2592 KiB | ||||
| 6 | Accepted | 3ms | 2816 KiB | ||||
| 7 | Accepted | 3ms | 2900 KiB | ||||
| 8 | Accepted | 3ms | 2908 KiB | ||||
| 9 | Accepted | 2ms | 2996 KiB | ||||
| 10 | Accepted | 2ms | 2992 KiB | ||||
| 11 | Accepted | 3ms | 3220 KiB | ||||
| 12 | Accepted | 3ms | 3304 KiB | ||||
| 13 | Accepted | 2ms | 3208 KiB | ||||
| 14 | Accepted | 3ms | 3340 KiB | ||||
| 15 | Accepted | 3ms | 3564 KiB | ||||
| 16 | Accepted | 3ms | 3772 KiB | ||||
| subtask3 | 12/12 | ||||||
| 17 | Accepted | 3ms | 2268 KiB | ||||
| 18 | Accepted | 3ms | 2356 KiB | ||||
| 19 | Accepted | 3ms | 2592 KiB | ||||
| 20 | Accepted | 3ms | 2816 KiB | ||||
| 21 | Accepted | 3ms | 2900 KiB | ||||
| 22 | Accepted | 3ms | 2908 KiB | ||||
| 23 | Accepted | 2ms | 2996 KiB | ||||
| 24 | Accepted | 2ms | 2992 KiB | ||||
| 25 | Accepted | 3ms | 3220 KiB | ||||
| 26 | Accepted | 3ms | 3304 KiB | ||||
| 27 | Accepted | 3ms | 3988 KiB | ||||
| 28 | Accepted | 3ms | 3840 KiB | ||||
| 29 | Accepted | 3ms | 3844 KiB | ||||
| 30 | Accepted | 3ms | 4072 KiB | ||||
| 31 | Accepted | 3ms | 4176 KiB | ||||
| 32 | Accepted | 2ms | 4272 KiB | ||||
| 33 | Accepted | 3ms | 4276 KiB | ||||
| 34 | Accepted | 3ms | 4360 KiB | ||||
| 35 | Accepted | 3ms | 4356 KiB | ||||
| 36 | Accepted | 3ms | 4360 KiB | ||||
| 37 | Accepted | 2ms | 3208 KiB | ||||
| 38 | Accepted | 3ms | 3340 KiB | ||||
| 39 | Accepted | 3ms | 4464 KiB | ||||
| 40 | Accepted | 3ms | 4480 KiB | ||||
| 41 | Accepted | 3ms | 4580 KiB | ||||
| 42 | Accepted | 3ms | 4752 KiB | ||||
| 43 | Accepted | 3ms | 3564 KiB | ||||
| 44 | Accepted | 3ms | 3772 KiB | ||||
| 45 | Accepted | 3ms | 4608 KiB | ||||
| 46 | Accepted | 3ms | 4528 KiB | ||||
| 47 | Accepted | 3ms | 4616 KiB | ||||
| 48 | Accepted | 3ms | 4648 KiB | ||||
| 49 | Accepted | 3ms | 4500 KiB | ||||
| subtask4 | 16/16 | ||||||
| 50 | Accepted | 3ms | 2268 KiB | ||||
| 51 | Accepted | 3ms | 2356 KiB | ||||
| 52 | Accepted | 3ms | 2592 KiB | ||||
| 53 | Accepted | 3ms | 2816 KiB | ||||
| 54 | Accepted | 3ms | 2900 KiB | ||||
| 55 | Accepted | 3ms | 2908 KiB | ||||
| 56 | Accepted | 2ms | 2996 KiB | ||||
| 57 | Accepted | 2ms | 2992 KiB | ||||
| 58 | Accepted | 3ms | 3220 KiB | ||||
| 59 | Accepted | 3ms | 3304 KiB | ||||
| 60 | Accepted | 3ms | 3988 KiB | ||||
| 61 | Accepted | 3ms | 3840 KiB | ||||
| 62 | Accepted | 3ms | 3844 KiB | ||||
| 63 | Accepted | 3ms | 4072 KiB | ||||
| 64 | Accepted | 3ms | 4176 KiB | ||||
| 65 | Accepted | 2ms | 4272 KiB | ||||
| 66 | Accepted | 3ms | 4276 KiB | ||||
| 67 | Accepted | 3ms | 4360 KiB | ||||
| 68 | Accepted | 3ms | 4356 KiB | ||||
| 69 | Accepted | 3ms | 4360 KiB | ||||
| 70 | Accepted | 3ms | 4404 KiB | ||||
| 71 | Accepted | 3ms | 4404 KiB | ||||
| 72 | Accepted | 3ms | 4500 KiB | ||||
| 73 | Accepted | 3ms | 4400 KiB | ||||
| 74 | Accepted | 3ms | 4400 KiB | ||||
| 75 | Accepted | 2ms | 4400 KiB | ||||
| 76 | Accepted | 3ms | 4400 KiB | ||||
| 77 | Accepted | 3ms | 4680 KiB | ||||
| 78 | Accepted | 3ms | 4772 KiB | ||||
| 79 | Accepted | 3ms | 4856 KiB | ||||
| 80 | Accepted | 2ms | 3208 KiB | ||||
| 81 | Accepted | 3ms | 3340 KiB | ||||
| 82 | Accepted | 3ms | 4464 KiB | ||||
| 83 | Accepted | 3ms | 4480 KiB | ||||
| 84 | Accepted | 3ms | 4580 KiB | ||||
| 85 | Accepted | 3ms | 4752 KiB | ||||
| 86 | Accepted | 3ms | 3564 KiB | ||||
| 87 | Accepted | 3ms | 3772 KiB | ||||
| 88 | Accepted | 3ms | 4608 KiB | ||||
| 89 | Accepted | 3ms | 4528 KiB | ||||
| 90 | Accepted | 3ms | 4616 KiB | ||||
| 91 | Accepted | 3ms | 4648 KiB | ||||
| 92 | Accepted | 3ms | 4500 KiB | ||||
| subtask5 | 60/60 | ||||||
| 93 | Accepted | 3ms | 2268 KiB | ||||
| 94 | Accepted | 57ms | 6864 KiB | ||||
| 95 | Accepted | 3ms | 2356 KiB | ||||
| 96 | Accepted | 3ms | 2592 KiB | ||||
| 97 | Accepted | 3ms | 2816 KiB | ||||
| 98 | Accepted | 3ms | 2900 KiB | ||||
| 99 | Accepted | 3ms | 2908 KiB | ||||
| 100 | Accepted | 2ms | 2996 KiB | ||||
| 101 | Accepted | 2ms | 2992 KiB | ||||
| 102 | Accepted | 3ms | 3220 KiB | ||||
| 103 | Accepted | 3ms | 3304 KiB | ||||
| 104 | Accepted | 3ms | 3988 KiB | ||||
| 105 | Accepted | 3ms | 3840 KiB | ||||
| 106 | Accepted | 3ms | 3844 KiB | ||||
| 107 | Accepted | 3ms | 4072 KiB | ||||
| 108 | Accepted | 3ms | 4176 KiB | ||||
| 109 | Accepted | 2ms | 4272 KiB | ||||
| 110 | Accepted | 3ms | 4276 KiB | ||||
| 111 | Accepted | 3ms | 4360 KiB | ||||
| 112 | Accepted | 3ms | 4356 KiB | ||||
| 113 | Accepted | 3ms | 4360 KiB | ||||
| 114 | Accepted | 3ms | 4404 KiB | ||||
| 115 | Accepted | 3ms | 4404 KiB | ||||
| 116 | Accepted | 3ms | 4500 KiB | ||||
| 117 | Accepted | 3ms | 4400 KiB | ||||
| 118 | Accepted | 3ms | 4400 KiB | ||||
| 119 | Accepted | 2ms | 4400 KiB | ||||
| 120 | Accepted | 3ms | 4400 KiB | ||||
| 121 | Accepted | 3ms | 4680 KiB | ||||
| 122 | Accepted | 3ms | 4772 KiB | ||||
| 123 | Accepted | 3ms | 4856 KiB | ||||
| 124 | Accepted | 34ms | 6864 KiB | ||||
| 125 | Accepted | 32ms | 6864 KiB | ||||
| 126 | Accepted | 37ms | 6920 KiB | ||||
| 127 | Accepted | 43ms | 6860 KiB | ||||
| 128 | Accepted | 35ms | 6940 KiB | ||||
| 129 | Accepted | 57ms | 6972 KiB | ||||
| 130 | Accepted | 46ms | 6860 KiB | ||||
| 131 | Accepted | 41ms | 6928 KiB | ||||
| 132 | Accepted | 57ms | 6988 KiB | ||||
| 133 | Accepted | 2ms | 3208 KiB | ||||
| 134 | Accepted | 3ms | 3340 KiB | ||||
| 135 | Accepted | 3ms | 4464 KiB | ||||
| 136 | Accepted | 3ms | 4480 KiB | ||||
| 137 | Accepted | 3ms | 4580 KiB | ||||
| 138 | Accepted | 3ms | 4752 KiB | ||||
| 139 | Accepted | 3ms | 3564 KiB | ||||
| 140 | Accepted | 3ms | 3772 KiB | ||||
| 141 | Accepted | 3ms | 4608 KiB | ||||
| 142 | Accepted | 3ms | 4528 KiB | ||||
| 143 | Accepted | 3ms | 4616 KiB | ||||
| 144 | Accepted | 20ms | 6728 KiB | ||||
| 145 | Accepted | 20ms | 6728 KiB | ||||
| 146 | Accepted | 24ms | 7120 KiB | ||||
| 147 | Accepted | 16ms | 6084 KiB | ||||
| 148 | Accepted | 23ms | 6728 KiB | ||||
| 149 | Accepted | 21ms | 6728 KiB | ||||
| 150 | Accepted | 3ms | 4648 KiB | ||||
| 151 | Accepted | 3ms | 4500 KiB | ||||
| 152 | Accepted | 20ms | 6732 KiB | ||||