Submission #685267

#	Time	Username	Problem	Language	Result	Execution time	Memory
685267		YENGOYAN	Bitaro the Brave (JOI19_ho_t1)	C++17	100 / 100	166 ms	19032 KiB

joi2019_ho_t1

/*
	//\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\\
	\\                                    //
	//  271828___182845__904523__53602__  \\
	\\  87___47____13______52____66__24_  //
	//  97___75____72______47____09___36  \\
	\\  999595_____74______96____69___67  //
	//  62___77____24______07____66__30_  \\
	\\  35___35____47______59____45713__  //
	//                                    \\
	\\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\//
												*/

#include <iostream>
#include <vector>
#include <set>
#include <map>
#include <unordered_map>
#include <unordered_set>
#include <cmath>
#include <climits>
#include <algorithm>
#include <random>
#include <queue>
#include <deque>
#include <iomanip>
#include <string>
#include <tuple>
#include <bitset>
#include <chrono>
#include <ctime>
#include <fstream>
#include <stack>
#include <cstdio>

using namespace std;
using ll = long long;
const int N = 3e5 + 5;
const ll mod = 1e9 + 7, inf = 1e18;

void solve() {
	int n, m; cin >> n >> m;
	vector<string> v(n);
	for (int i = 0; i < n; ++i) cin >> v[i];
	vector<ll> cnt_o(n), cnt_i(m);
	for (int i = 0; i < n; ++i) {
		for (int j = 0; j < m; ++j) {
			if (v[i][j] == 'O') ++cnt_o[i];
		}
	}
	for (int j = 0; j < m; ++j) {
		for (int i = 0; i < n; ++i) {
			if (v[i][j] == 'I') ++cnt_i[j];
		}
	}
	ll ans = 0;
	for (int i = 0; i < n; ++i) {
		for (int j = 0; j < m; ++j) {
			if (v[i][j] == 'J') {
				ans += cnt_i[j] * cnt_o[i];
			}
			else if (v[i][j] == 'O') --cnt_o[i];
			else --cnt_i[j];
		}
	}
	cout << ans;
}

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(NULL);
	//int t; cin >> t;
	//while (t--)
		solve();
}

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