제출 #518412

#제출 시각아이디문제언어결과실행 시간메모리
518412Alex_tz307Bitaro the Brave (JOI19_ho_t1)C++17
100 / 100
63 ms27752 KiB
#include <bits/stdc++.h> using namespace std; void testCase() { int n, m; cin >> n >> m; vector<string> a(n); for (auto &s : a) { cin >> s; } vector<vector<short>> ingot(n + 1, vector<short>(m + 1)); int64_t ans = 0; for (int i = n - 1; i >= 0; --i) { int orb = 0; for (int j = m - 1; j >= 0; --j) { if (a[i][j] == 'J') { ans += (int64_t)ingot[i + 1][j] * orb; } ingot[i][j] = ingot[i + 1][j] + (a[i][j] == 'I'); orb += (a[i][j] == 'O'); } } cout << ans << '\n'; } int main() { ios_base::sync_with_stdio(false); cin.tie(nullptr); int tests = 1; for (int tc = 0; tc < tests; ++tc) { testCase(); } return 0; }
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