Submission #1340961

#	Time	Username	Problem	Language	Result	Execution time	Memory
1340961		nathlol2	Fancy Fence (CEOI20_fancyfence)	C++20	30 / 100	1095 ms	1152 KiB

fancyfence

#include <bits/stdc++.h>
#define int long long
using namespace std;
const int N = 1e5 + 5, MD = 1e9 + 7;
int n, ans, a[N], h[N];

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    cin >> n;
    for(int i = 1;i<=n;i++) cin >> h[i];
    for(int i = 1;i<=n;i++) cin >> a[i];
    for(int i = 1;i<=n;i++){
        int mn = h[i];
        ans = (ans + (((a[i] * (a[i] + 1)) / 2) % MD) * (((mn * (mn + 1)) / 2) % MD)) % MD;
        for(int j = i + 1;j<=n;j++){
            mn = min(mn, h[j]);
            ans = (ans + ((a[i] * a[j]) % MD) * (((mn * (mn + 1)) / 2) % MD)) % MD;
        }
    }
    cout << ans;
}

• Subtask 1: 0 / 0
• Subtask 2: 12 / 12
• Subtask 3: 0 / 13
• Subtask 4: 0 / 15
• Subtask 5: 0 / 15
• Subtask 6: 18 / 18
• Subtask 7: 0 / 27