Submission #220392

#	Time	Username	Problem	Language	Result	Execution time	Memory
220392		hanagasumi	Bitaro the Brave (JOI19_ho_t1)	C++17	100 / 100	190 ms	17916 KiB

joi2019_ho_t1

#include <iostream>
#include <vector>
#include <cmath>
#include <algorithm>
#include <deque>
#include <map>
#include <set>
#include <complex>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <random>

#define ft first
#define sc second
#define pb push_back
#define len(v) (int)v.size()
#define int ll

using namespace std;
typedef long long ll;

signed main() {
	 #ifdef PC 
		freopen("in.txt", "r", stdin);
		freopen("out.txt", "w", stdout);
	#endif
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);

	int h, w;
	cin >> h >> w;
	vector<vector<char>> mat(h, vector<char>(w));
	for (int i = 0; i < h; i++) {
		for (int j = 0; j < w; j++) {
			cin >> mat[i][j];
		}
	}

	int ans = 0;
	vector<int> have(w, 0);
	for (int i = h - 1; i >= 0; i--) {
		int now = 0;
		for (int j = w - 1; j >= 0; j--) {
			if(mat[i][j] == 'I') 
				have[j]++;
			if(mat[i][j] == 'O')
				now++;
			if(mat[i][j] == 'J') {
				ans += have[j] * now;
			}
		}
	}
	cout << ans << '\n';
	return 0;
}

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