Submission #227651

#	Time	Username	Problem	Language	Result	Execution time	Memory
227651		arman_ferdous	Senior Postmen (BOI14_postmen)	C++17	55 / 100	545 ms	61408 KiB

postmen

/* Author : arman_ferdous 
 * Date   : 28 Apr 2020 14:31:14
 * TAG    : Noob Problem 
 */

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

using ll = long long;
using ii = pair<int,int>;

const int N = 5e5+10;

int n, m;
int l[N], r[N];
vector<int> g[N];

int vis[N];
stack<int> st;
void tour(int u) {
  while(!g[u].empty()) {
    int i = g[u].back(); g[u].pop_back();
    if(vis[i]) continue;
    vis[i] = 1;
    tour(l[i] ^ r[i] ^ u);
  }
  st.push(u);
}

stack<int> soln;

int main() { 
  scanf("%d %d", &n, &m);
  for(int i = 0; i < m; i++) {
    scanf("%d %d", &l[i], &r[i]);
    g[l[i]].push_back(i);
    g[r[i]].push_back(i);
  }
  tour(1);
  for(int i = 1; i <= n; i++) vis[i] = 0;

  while(!st.empty()) {
    int u = st.top(); st.pop();
    if(vis[u]) {
      printf("%d ", u);
      while(!soln.empty()) {
        int v = soln.top(); soln.pop();
        if(v == u) break;
        printf("%d ", v);
        vis[v] = 0;
      }
      puts("");
    } 
    vis[u] = 1;
    soln.push(u);
  }
  return 0;
}

Compilation message (stderr)

postmen.cpp: In function 'int main()':
postmen.cpp:33:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d", &n, &m);
   ~~~~~^~~~~~~~~~~~~~~~~
postmen.cpp:35:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &l[i], &r[i]);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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