제출 #389883

#제출 시각아이디문제언어결과실행 시간메모리
389883vishesh312Bitaro the Brave (JOI19_ho_t1)C++17
100 / 100
241 ms88640 KiB
#include "bits/stdc++.h" using namespace std; /* #include <ext/pb_ds/assoc_container.hpp> using namespace __gnu_pbds; using ordered_set = tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update>; */ #define all(x) begin(x), end(x) #define sz(x) (int)x.size() using ll = long long; const int mod = 1e9+7; void solve(int tc) { int n, m; cin >> n >> m; vector<vector<char>> v(n, vector<char>(m)); vector<vector<int>> ing(n, vector<int>(m)), orb(n, vector<int>(m)); for (int i = 0; i < n; ++i) { for (int j = 0; j < m; ++j) { cin >> v[i][j]; ing[i][j] = (v[i][j] == 'I'); if (i) ing[i][j] += ing[i-1][j]; orb[i][j] = (v[i][j] == 'O'); if (j) orb[i][j] += orb[i][j-1]; } } ll ans = 0; for (int i = 0; i < n; ++i) for (int j = 0; j < m; ++j) ans += (v[i][j] == 'J') * (ing[n-1][j] - ing[i][j]) * (orb[i][m-1] - orb[i][j]); cout << ans << '\n'; } signed main() { ios_base::sync_with_stdio(false); cin.tie(NULL); int tc = 1; //cin >> tc; for (int i = 1; i <= tc; ++i) solve(i); return 0; }
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