Submission #382828

#	Time	Username	Problem	Language	Result	Execution time	Memory
382828		ritul_kr_singh	Bitaro the Brave (JOI19_ho_t1)	C++17	100 / 100	383 ms	153452 KiB

joi2019_ho_t1

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define sp << " " <<
#define nl << "\n"

signed main(){
	cin.tie(0)->sync_with_stdio(0);
	int h, w; cin >> h >> w;
	char g[h][w];
	int orbs[h][w], ingots[h][w];
	for(int i=0; i<h; ++i)
		for(int j=0; j<w; ++j)
			orbs[i][j] = ingots[i][j] = 0;
	for(int i=0; i<h; ++i){
		for(int j=0; j<w; ++j){
			cin >> g[i][j];
			if(g[i][j]=='O') ++orbs[i][j];
			if(g[i][j]=='I') ++ingots[i][j];
		}
	}
	for(int i=h-2; i>=0; --i){
		for(int j=w-2; j>=0; --j){
			orbs[i][j] += orbs[i][j+1];
			ingots[i][j] += ingots[i+1][j];
		}
	}
	int ans = 0;
	for(int i=0; i<h; ++i){
		for(int j=0; j<w; ++j){
			if(g[i][j]=='J') ans += (orbs[i][j]*ingots[i][j]);
		}
	}
	cout << ans;
}

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