제출 #888382

#제출 시각아이디문제언어결과실행 시간메모리
888382hafoBitaro the Brave (JOI19_ho_t1)C++14
100 / 100
170 ms48980 KiB
#include <bits/stdc++.h> #define ll long long #define ull unsigned ll #define pb push_back #define pa pair<int, int> #define pall pair<ll, int> #define fi first #define se second #define TASK "test" #define Size(x) (int) x.size() #define all(x) x.begin(), x.end() using namespace std; template<typename T1, typename T2> bool mini (T1 &a, T2 b) {if(a > b) a = b; else return 0; return 1;} template<typename T1, typename T2> bool maxi (T1 &a, T2 b) {if(a < b) a = b; else return 0; return 1;} const int MOD = 1e9 + 7; const int LOG = 20; const int maxn = 3e3 + 7; const ll oo = 1e18 + 69; int n, m, col[maxn][maxn]; char a[maxn][maxn]; int main() { ios_base::sync_with_stdio(false); cin.tie(NULL); //freopen(TASK".inp", "r", stdin); //freopen(TASK".out", "w", stdout); 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 <= m; i++) { for(int j = n; j >= 1; j--) { col[i][j] = col[i][j + 1]; if(a[j][i] == 'I') col[i][j]++; } } ll ans = 0; for(int i = 1; i <= n; i++) { ll sum = 0; for(int j = 1; j <= m; j++) { if(a[i][j] == 'J') sum += col[j][i + 1]; if(a[i][j] == 'O') ans += sum; } } cout<<ans; return 0; }
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