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Submission #906427

# Submission time Handle Problem Language Result Execution time Memory
906427 2024-01-14T09:06:12 Z Ludissey Fancy Fence (CEOI20_fancyfence) C++14
15 / 100
 23 ms 2040 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long
 
int n,m;
int mod=1e9+7;
int clc(int x) { return (((x*(x+1)))/(long long)2)%mod; }
signed main() {
    ios::sync_with_stdio(false); cin.tie(nullptr);
    cin >> n;
    vector<int> h(n+1);
    vector<int> w(n+1);
    int totalw=0;
    for (int i = 1; i <= n; i++) cin>>h[i];
    for (int i = 1; i <= n; i++) { cin >> w[i]; totalw=(totalw+w[i])%mod; }
    int outp=0;
    h[0]=0;
    for (int i = 1; i <= n; i++)
    {
        int side1=(clc(totalw%mod)*clc(h[i]%mod));
        int side2=(clc(totalw%mod)*clc(h[i-1]%mod));
        side1-=side2;
        side1%=mod;
        outp+=side1;
        outp%=mod;
        totalw-=w[i];
    }
    outp%=mod;
    cout << outp << "\n";
    return 0;
}

Subtask #1
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Incorrect 1 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Incorrect 1 ms 344 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 2 ms 604 KB Output is correct
3 Correct 11 ms 1116 KB Output is correct
4 Correct 21 ms 1884 KB Output is correct
5 Correct 20 ms 1884 KB Output is correct
6 Correct 1 ms 348 KB Output is correct

Subtask #5
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 3 ms 852 KB Output is correct
4 Correct 11 ms 1116 KB Output is correct
5 Correct 23 ms 1884 KB Output is correct
6 Correct 21 ms 2040 KB Output is correct
7 Incorrect 1 ms 348 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #6
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Incorrect 1 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #7
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Incorrect 1 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -