Submission #532839

#	Time	Username	Problem	Language	Result	Execution time	Memory
532839		amunduzbaev	Bitaro the Brave (JOI19_ho_t1)	C++17	100 / 100	77 ms	19016 KiB

joi2019_ho_t1

#include "bits/stdc++.h"
using namespace std;

#define ar array
#define int long long

signed main(){
	ios::sync_with_stdio(0); cin.tie(0);
	
	int n, m; cin>>n>>m;
	vector<string> a(n);
	for(int i=0;i<n;i++) cin>>a[i];
	vector<int> row(n), col(m);
	int res = 0;
	for(int i=n-1;~i;i--){
		for(int j=m-1;~j;j--){
			if(a[i][j] == 'J'){
				res += row[i] * col[j];
			}
			
			if(a[i][j] == 'O') row[i]++;
			if(a[i][j] == 'I') col[j]++;
		}
	}
	
	cout<<res<<"\n";
}

• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 50 / 50