Submission #1101170

#	Time	Username	Problem	Language	Result	Execution time	Memory
1101170		vladilius	Fancy Fence (CEOI20_fancyfence)	C++17	30 / 100	1072 ms	1620 KiB

fancyfence

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<int, int>;
#define pb push_back
#define ff first
#define ss second
const int mod = 1e9 + 7;

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    
    int n; cin>>n;
    vector<int> h(n + 1);
    for (int i = 1; i <= n; i++){
        cin>>h[i];
    }
    vector<int> w(n + 1);
    for (int i = 1; i <= n; i++){
        cin>>w[i];
    }
    
    ll out = 0;
    for (int i = 1; i <= n; i++){
        out += (((1LL * w[i] * (w[i] + 1) / 2) % mod) * ((1LL * h[i] * (h[i] + 1) / 2) % mod)) % mod;
        int x = h[i];
        for (int j = i + 1; j <= n; j++){
            x = min(x, h[j]);
            out += (((1LL * w[i] * w[j]) % mod) * ((1LL * x * (x + 1) / 2) % mod)) % mod;
        }
        out %= mod;
    }
    cout<<out<<"\n";
}

• 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