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답안 #466230

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
466230 2021-08-18T11:28:17 Z AmirElarbi 어르신 집배원 (BOI14_postmen) C++17
0 / 100
 11 ms 12108 KB 
#include <bits/stdc++.h>
#define vi vector<int>
#define ve vector
#define ll long long
#define vf vector<float>
#define vll vector<pair<ll,ll>>
#define ii pair<int,int>
#define vvi vector<vi>
#define vii vector<ii>
#define gii greater<ii>
#define pb push_back
#define fi first
#define se second
#define INF 1e7
#define unsigned u
#define eps 1e-18
#define eps1 1e-25
#define optimise ios_base::sync_with_stdio(false);cin.tie(NULL);
#define MAX_A 100005
#define V 450
#define re register
#define maxi(a,b) ((a) > (b) ? (a) : (b))
using namespace std;
const int maxn = 5e5 + 5;
struct edge { int fi, se; };
ve<edge> adj[maxn];
bool vis[maxn], tv[maxn];
int parent[maxn];
void dfs(int u){
    if(tv[u]){
        while(tv[u]){
            cout << u << " ";
            tv[u] = 0;
            u = parent[u];
        }
        cout << endl;
    }
    while(!adj[u].empty()){
        edge x =adj[u].back();
        adj[u].pop_back();
        if(!vis[x.se]){
            vis[x.se] = 1;
            tv[u] = 1;
            parent[u] = x.fi;
            dfs(x.fi);
        }
    }
}
int main(){
    optimise;
    #ifndef ONLINE_JUDGE
        freopen("input.txt", "r", stdin);
        freopen("output.txt", "w", stdout);
    #endif
    int n,m,a,b;
    cin >> n >> m;
    for (int i = 0; i < m; ++i)
    {
        cin >> a >>b;
        adj[a].pb({b,i});
        adj[b].pb({a,i});
    }
    dfs(1);
}

Compilation message

postmen.cpp: In function 'int main()':
postmen.cpp:52:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   52 |         freopen("input.txt", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
postmen.cpp:53:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   53 |         freopen("output.txt", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 38.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 11 ms 12108 KB Some edges were not used
2 Halted 0 ms 0 KB -

Subtask #2
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 10 ms 12108 KB Some edges were not used
2 Halted 0 ms 0 KB -

Subtask #3
0 / 45.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 10 ms 12012 KB Some edges were not used
2 Halted 0 ms 0 KB -