#include <bits/stdc++.h>
#define FastIO ios::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL)
using namespace std;
typedef long long ll;
int main() {
FastIO;
ll i, until, ans, N;
cin >> N;
vector<ll> rooms(N);
for(i = 0; i < N; i++)
cin >> rooms[i];
vector<bool> keys(N, false);
until = 0;
ans = -1;
while(until < N) {
ans++;
for(i = 0; i <= until; i++)
keys[(rooms[i] + ans) % N] = true;
while(keys[until])
keys[(rooms[++until] + ans) % N] = true;
}
cout << ans << '\n';
return 0;
}
Részfeladat | Összpont | Teszt | Verdikt | Idő | Memória | ||
---|---|---|---|---|---|---|---|
base | 40/40 | ||||||
1 | Elfogadva | 0/0 | 3ms | 1828 KiB | |||
2 | Elfogadva | 0/0 | 14ms | 3000 KiB | |||
3 | Elfogadva | 2/2 | 3ms | 2500 KiB | |||
4 | Elfogadva | 2/2 | 3ms | 2720 KiB | |||
5 | Elfogadva | 2/2 | 3ms | 2880 KiB | |||
6 | Elfogadva | 2/2 | 3ms | 3212 KiB | |||
7 | Elfogadva | 2/2 | 3ms | 3356 KiB | |||
8 | Elfogadva | 2/2 | 3ms | 3432 KiB | |||
9 | Elfogadva | 2/2 | 3ms | 3588 KiB | |||
10 | Elfogadva | 2/2 | 3ms | 3568 KiB | |||
11 | Elfogadva | 2/2 | 28ms | 5120 KiB | |||
12 | Elfogadva | 2/2 | 29ms | 5076 KiB | |||
13 | Elfogadva | 2/2 | 29ms | 5080 KiB | |||
14 | Elfogadva | 2/2 | 29ms | 5336 KiB | |||
15 | Elfogadva | 2/2 | 28ms | 5540 KiB | |||
16 | Elfogadva | 2/2 | 28ms | 5596 KiB | |||
17 | Elfogadva | 2/2 | 26ms | 5596 KiB | |||
18 | Elfogadva | 2/2 | 29ms | 5724 KiB | |||
19 | Elfogadva | 2/2 | 27ms | 5632 KiB | |||
20 | Elfogadva | 2/2 | 29ms | 5636 KiB | |||
21 | Elfogadva | 2/2 | 26ms | 5632 KiB | |||
22 | Elfogadva | 2/2 | 32ms | 5632 KiB |