제출 #288649

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
288649		LordOfIran	Senior Postmen (BOI14_postmen)	C++17	55 / 100	1060 ms	59032 KiB

postmen

//                             In The Name Of Allah                                           
#include <bits/stdc++.h>
#define	ss second
#define ff first
#define use_fast ios::sync_with_stdio(false), cin.tie(0), cout.tie(0)
#define se(n) cout << setprecision(n) << fixed
#define pb push_back
//#define ll long long
#define ld long double
#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops")
#pragma GCC optimize("no-stack-protector,fast-math")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
using namespace std; 
const int N = 5e5 + 100, OO = 1e9 + 7, K = 1e7 + 4, T = 22, M = 1e9 + 7, P = 6151, SQ = 1300, lg = 22;
typedef pair <int, int> pii;
bool mark[N];
int num[N], ET[N], l[N], r[N], nw[N], ht[N], nxt = 0;
vector <int> v[N];

inline void dfs(int x) {
	for(; nw[x] < (int)v[x].size(); nw[x]++) {
		int p = v[x][nw[x]];
		if(mark[p])
			continue;
		mark[p] = true;
		dfs(l[p] ^ r[p] ^ x);
		ET[nxt++] = x;
	}
}

int32_t main() {
	int n, m;
	scanf("%d%d", &n, &m);
	for(int i = 0; i < m; i++) {
		cin >> l[i] >> r[i];
		v[r[i]].pb(i);
		v[l[i]].pb(i);
	}
	dfs(1);
	int sz = -1;
	for(int i = 0; i < nxt; i++) {
		int u = ET[i];
		if(num[u]) {
			printf("%d", u);
			while(ht[sz] != u) 	
				printf(" %d", ht[sz]), num[ht[sz]]--, sz--;
			cout << "\n";
		}
		else 
			ht[++sz] = u, num[u]++;
	}
	for(int i = 0; i <= sz; i++)
		printf("%d ", ht[i]);
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

postmen.cpp: In function 'int32_t main()':
postmen.cpp:33:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   33 |  scanf("%d%d", &n, &m);
      |  ~~~~~^~~~~~~~~~~~~~~~

• Subtask 1: 38 / 38
• Subtask 2: 17 / 17
• Subtask 3: 0 / 45