제출 #1291428

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1291428		Nonoze	Bitaro the Brave (JOI19_ho_t1)	C++20	100 / 100	166 ms	151412 KiB

joi2019_ho_t1

/*
*	Author: Nonoze
*	Created: Sunday 16/11/2025
*/
#include <bits/stdc++.h>
using namespace std;

#ifndef DEBUG
	#define dbg(...)
#endif

// #define cout cerr << "OUT: "
#define endl '\n'
#define endlfl '\n' << flush
#define quit(x) return (void)(cout << x << endl)

template<typename T> void read(T& x) { cin >> x; }
template<typename T1, typename T2> void read(pair<T1, T2>& p) { read(p.first), read(p.second); }
template<typename T> void read(vector<T>& v) { for (auto& x : v) read(x); }
template<typename T1, typename T2> void read(T1& x, T2& y) { read(x), read(y); }
template<typename T1, typename T2, typename T3> void read(T1& x, T2& y, T3& z) { read(x), read(y), read(z); }
template<typename T1, typename T2, typename T3, typename T4> void read(T1& x, T2& y, T3& z, T4& zz) { read(x), read(y), read(z), read(zz); }
template<typename T> void print(vector<T>& v) { for (auto& x : v) cout << x << ' '; cout << endl; }

#define sz(x) (int)(x.size())
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define make_unique(v) sort(all(v)), v.erase(unique(all(v)), (v).end())
#define pb push_back
#define mp(a, b) make_pair(a, b)
#define fi first
#define se second
#define cmin(a, b) a = min(a, b)
#define cmax(a, b) a = max(a, b)
#define YES cout << "YES" << endl
#define NO cout << "NO" << endl
#define QYES quit("YES")
#define QNO quit("NO")

#define int long long
#define double long double
const int inf = numeric_limits<int>::max() / 4;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const int MOD = 1e9+7, LOG=20;



void solve();

signed main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	int tt=1;
	// cin >> tt;
	while(tt--) solve();
	return 0;
}




int n, k, m, q;
vector<string> a;


void solve() {
	read(n, m);
	a.clear(), a.resize(n); read(a);
	vector<vector<int>> down(n, vector<int>(m, 0)), right(n, vector<int>(m, 0));
	for (int i=n-1; i>=0; i--) {
		for (int j=m-1; j>=0; j--) {
			down[i][j] = (i+1 < n ? down[i+1][j] : 0);
			right[i][j] = (j+1 < m ? right[i][j+1] : 0);
			if (a[i][j]=='I') down[i][j]++;
			if (a[i][j]=='O') right[i][j]++;
		}
	}
	int ans=0;
	for (int i=0; i<n; i++) for (int j=0; j<m; j++) if (a[i][j]=='J') ans += down[i][j] * right[i][j];
	cout << ans << endl;
}

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