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Submission #745905

# Submission time Handle Problem Language Result Execution time Memory
745905 2023-05-21T09:32:16 Z vjudge1 Fancy Fence (CEOI20_fancyfence) C++17
0 / 100
 1 ms 256 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
constexpr ll MOD = 1e9 + 7;

ll mul(ll a, ll b){
    a %= MOD;
    b %= MOD;
    return ((a * b) % MOD);
}

ll half(ll a){
    return a % 2 ? a : a / 2;
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int n;
    cin >> n;
    int h, w;
    for (int i=0; i<n; i++){
        cin >> h;
    }
    for (int i=0; i<n; i++){
        int a;
        cin >> a;
        w += a;
    }
    cout << mul(mul(half(h), half(h+1)), mul(half(w), half(w+1)));
}

Compilation message

fancyfence.cpp: In function 'int main()':
fancyfence.cpp:31:61: warning: 'w' may be used uninitialized in this function [-Wmaybe-uninitialized]
   31 |     cout << mul(mul(half(h), half(h+1)), mul(half(w), half(w+1)));
      |                                                            ~^~

Subtask #1
0 / 0.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 256 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 18.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 27.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -