Submission #1356670

#	Time	Username	Problem	Language	Result	Execution time	Memory
1356670		Aviansh	Flooding Wall (BOI24_wall)	C++20	12 / 100	35 ms	8180 KiB

Main

#include <bits/stdc++.h>

using namespace std;

const int mod = 1e9+7;

signed main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    int n;
    cin >> n;
    int a[n],b[n];
    for(int &i : a){
        cin >> i;
    }
    for(int &i : b){
        cin >> i;
    }
    long long po[n];
    po[0]=1;
    for(int i = 1;i<n;i++){
        po[i]=po[i-1]*2;
        po[i]%=mod;
    }
    long long ans = 0;
    for(int i = 0;i<n;i++){
        ans+=(po[i]-1)*(po[n-i-1]-1);
        ans%=mod;
    }
    cout << ans;
    return 0;
}

• Subtask 1: 0 / 8
• Subtask 2: 0 / 17
• Subtask 3: 0 / 19
• Subtask 4: 0 / 14
• Subtask 5: 12 / 12
• Subtask 6: 0 / 30