Submission #1047827

#TimeUsernameProblemLanguageResultExecution timeMemory
1047827manhlinh1501Bitaro the Brave (JOI19_ho_t1)C++17
100 / 100
113 ms88660 KiB
#include <bits/stdc++.h> using namespace std; using i64 = long long; const int MAXN = 3e3 + 5; int N, M; char a[MAXN][MAXN]; int cO[MAXN][MAXN]; int cI[MAXN][MAXN]; signed main() { #define TASK "code" if (fopen(TASK ".inp", "r")) { freopen(TASK ".inp", "r", stdin); freopen(TASK ".out", "w", stdout); } ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0); cin >> N >> M; for(int i = 1; i <= N; i++) { for(int j = 1; j <= M; j++) cin >> a[i][j]; } for(int i = 1; i <= N; i++) { int cnt = 0; for(int j = M; j >= 1; j--) { if(a[i][j] == 'O') cnt++; cO[i][j] = cnt; } } for(int j = 1; j <= M; j++) { int cnt = 0; for(int i = N; i >= 1; i--) { if(a[i][j] == 'I') cnt++; cI[i][j] = cnt; } } i64 ans = 0; for(int i = 1; i <= N; i++) { for(int j = 1; j <= M; j++) { if(a[i][j] == 'J') ans += 1LL * cO[i][j] * cI[i][j]; } } cout << ans; return (0 ^ 0); }

Compilation message (stderr)

joi2019_ho_t1.cpp: In function 'int main()':
joi2019_ho_t1.cpp:15:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |         freopen(TASK ".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
joi2019_ho_t1.cpp:16:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |         freopen(TASK ".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
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