제출 #288670

#제출 시각아이디문제언어결과실행 시간메모리
288670LordOfIran어르신 집배원 (BOI14_postmen)C++17
100 / 100
330 ms47612 KiB
#include <bits/stdc++.h> using namespace std; #define rep(i , j , k) for (int i = j; i < (int)k; i++) #define pb push_back typedef vector<int> vi; constexpr int N = 5e5 + 10; int n, m, a, b; int ptr[N]; bitset<N> mark, mark2; int shit, to[N << 1], pre[N << 1], last[N << 1], junk[N << 1]; inline void addEdge(int a , int b) { to[shit] = b; pre[shit] = last[a]; last[a] = shit++; to[shit] = a; pre[shit] = last[b]; last[b] = shit++; } int st[N], R; void dfs(int v) { while (last[v] != -1) { int id = last[v]; last[v] = pre[id]; if (!mark[id / 2]) { mark[id / 2] = true; dfs(to[id]); } } if (mark2[v]) { while (mark2[v]) { printf("%d" , st[R]); if (st[R] == v) printf("\n"); else printf(" "); mark2[st[R]] = false; R--; } } mark2[v] = true; st[++R] = v; } int main() { memset(last, -1, sizeof(last)); scanf("%d%d" , &n , &m); rep(i , 0 , m) { scanf("%d%d" , &a , &b); addEdge(a , b); } dfs(1); return 0; }

컴파일 시 표준 에러 (stderr) 메시지

postmen.cpp: In function 'int main()':
postmen.cpp:49:11: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   49 |      scanf("%d%d" , &n , &m);
      |      ~~~~~^~~~~~~~~~~~~~~~~~
postmen.cpp:51:12: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   51 |       scanf("%d%d" , &a , &b);
      |       ~~~~~^~~~~~~~~~~~~~~~~~
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