제출 #1217317

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1217317		NoLove	Burza (COCI16_burza)	C++17	0 / 160	11 ms	23880 KiB

burza

/**
 *    author : Lăng Trọng Đạt
 *    created: 13-06-2025 
**/
#include <bits/stdc++.h>
using namespace std;
#ifndef LANG_DAT
#define db(...) ;
#endif // LANG_DAT
#define int long long
#define f first
#define se second
#define pb push_back
#define all(v) (v).begin(), (v).end()
#define FOR(i, a, b) for (int i = (a); (i) <= (b); (i++))
#define FD(i, lo, up) for (int i = (up); (i) >= (lo); i--)
#define si(x) (int)(x.size())
bool mx(int& a, int b) { if (b > a) {a = b; return true;} return false;}
bool mi(int& a, int b) { if (b < a) {a = b; return true;} return false;}
using pii = pair<int, int>;
const int INF = 1e18 + 5;
const int MOD = 1e9 + 7;

const int N = 1e6 + 5;
int g[N], d[N];
int n, m, k, q, a, b, c;

vector<int> adj[N];
bool ok(int v, int prv) {
    if (d[v] == k) return false;
    int cnt = 0;
    for (int u : adj[v]) {
        if (u == prv) continue;
        d[u] = d[v] + 1;
        if (!ok(u, v)) {
            cnt++;
        }
    }

    return cnt <= 1;
}

int32_t main() {
    cin.tie(0)->sync_with_stdio(0);
    if (fopen("hi.inp", "r")) {
        freopen("hi.inp", "r", stdin);
//        freopen("hi.out", "w", stdout);
    } 

    cin >> n >> k;
    FOR(i, 1, n - 1) {
        cin >> a >> b;
        adj[a].push_back(b);
        adj[b].push_back(a);
    }

    // ok(1, -1);
    cout << (ok(1, -1) ? "DA" : "NE");
}

컴파일 시 표준 에러 (stderr) 메시지

burza.cpp: In function 'int32_t main()':
burza.cpp:46:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   46 |         freopen("hi.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

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