제출 #1260395

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1260395		tminh	Emacs (COCI20_emacs)	C++20	50 / 50	0 ms	328 KiB

emacs

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

#define task ""
#define ll long long
#define endl '\n'
#define fi first
#define se second
#define vall(a) (a).begin(), (a).end()
#define sze(a) (int)a.size()
#define pii pair<int, int>
#define pll pair<ll, ll>


#define ep emplace_back
#define pb push_back
#define pf push_front


const ll mod = 1e9 + 7;
const int N = 105;
const ll oo = 1e18;

bool START;

int n, m;
char a[N][N];
ll ans = 0;
bool vis[N][N];

int hx[] = {0, 0, -1, 1};
int hy[] = {1, -1, 0, 0};

int bfs(int u, int v) {
	queue<pii> q;
	if (vis[u][v]) return 0;
	q.push(make_pair(u, v));
	
	while(!q.empty()) {
		auto[x, y] = q.front();
		q.pop();
		
		for (int i = 0; i < 4; ++i) {
			int xx = hx[i] + x;
			int yy = hy[i] + y;
			
			if (xx < 1 || xx > n || yy < 1 || yy > m || vis[xx][yy] || a[xx][yy] == '.') continue;
			vis[xx][yy] = true;
			q.push(make_pair(xx, yy));
		}
	}
	return 1;
}

inline void solve() {
	for (int i = 1; i <= n; ++i) {
		for (int j = 1; j <= m; ++j) if (a[i][j] == '*') ans += bfs(i, j);
	}
	cout << ans;
}


inline void input() {
    cin >> n >> m;
    for (int i = 1; i <= n; ++i) {
    	for (int j = 1; j <= m; ++j) cin >> a[i][j];
    }
    return solve();
}
bool END;

int main() {
    if(fopen(task ".inp", "r")) {
        freopen(task ".inp", "r", stdin);
        freopen(task ".out", "w", stdout);
    }
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr); cout.tie(nullptr);

    input();
    
    
    cerr << endl << "Time elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << 's' << endl;
    cerr << "Memory: " << fabs ((&END - &START)) / 1048576.0 << "MB\n";
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

emacs.cpp: In function 'int main()':
emacs.cpp:74:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   74 |         freopen(task ".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
emacs.cpp:75:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   75 |         freopen(task ".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 50 / 50