Submission #303332

#TimeUsernameProblemLanguageResultExecution timeMemory
303332BeanZFancy Fence (CEOI20_fancyfence)C++14
15 / 100
26 ms3960 KiB
// I_Love_LPL #include <bits/stdc++.h> using namespace std; #define ll long long #define endl '\n' const int N = 1e5 + 5; const int mod = 1e9 + 7; ll h[N], w[N]; int main(){ ios_base::sync_with_stdio(false); cin.tie(0); if (fopen("A.inp", "r")){ freopen("test.inp", "r", stdin); freopen("test.out", "w", stdout); } ll n; cin >> n; ll sum = 0; for (int i = 1; i <= n; i++) cin >> h[i]; for (int i = 1; i <= n; i++) cin >> w[i], sum = (sum + w[i]) % mod; cout << (sum * (sum + 1) / 2) % mod * ((h[1] * (h[1] + 1) / 2) % mod) % mod; } /* */

Compilation message (stderr)

fancyfence.cpp: In function 'int main()':
fancyfence.cpp:15:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   15 |                 freopen("test.inp", "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
fancyfence.cpp:16:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   16 |                 freopen("test.out", "w", stdout);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
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