oj.uz

Submission #86697

# Submission time Handle Problem Language Result Execution time Memory
86697 2018-11-27T06:23:40 Z qwerty12345 Pipes (CEOI15_pipes) C++14
10 / 100
 154 ms 8544 KB 
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#include <bits/stdc++.h>
#include <iostream>

#define for0(i , v) for (int i = 0 ; i < v.size() ; i++)
#define for1(i , n) for (int i = 1 ; i <= n ; i++)
#define AIDS ios_base::sync_with_stdio(0)
#define pb push_back
#define pp pop_back
#define sz(a) a.size()
#define all(x) x.begin() , x.end()
#define F first
#define S second
#define mp make_pair
#define ld long double
#define ll long long
#define pii pair<int, int>
#define in insert
#define vi vector <int>
#define vvi vector <vi>
#define Case "Case " << num << ": "

const int N = 1e6 + 3;
const ll INF = 1e18 + 100;
const int inf = 1e9 + 123;
const int MOD = 1e9 + 7;
const int dx[] = {0 , 1 , 0 , -1 , 0};
const int dy[] = {0 , 0 , 1 , 0 , -1};
const char dd[] = {' ' , 'D' , 'R' , 'U' , 'L'};

using namespace std;

vector <int> g[5001];
vector <pii> q;
bool used[5001];
int tin[5001] , fup[5001] , timer;

void dfs (int v, int p) {
	used[v] = 1;
	tin[v] = fup[v] = timer++;
	for (int to : g[v]) {
		if (to == p) continue;
		if (used[to])	
			fup[v] = min (fup[v], tin[to]);
		else {
			dfs (to, v);
			fup[v] = min (fup[v], fup[to]);
			if (fup[to] > tin[v]) {
				q.pb(mp(min(v , to) , max(v , to)));
			}
		}
	}
}

main () {
//  freopen("input.in", "r", stdin);
//  freopen("output.out", "w", stdout);
	AIDS;
	int n , m;
	cin >> n >> m;
	for (int i = 1 ; i <= m ; i++) {
		int l , r;
		cin >> l >> r;
		g[l].pb(r);
		g[r].pb(l);
	}
	for (int i = 1 ; i <= n ; i++) {
		if (!used[i]) {
			dfs(i , -1);
		}
	}
	for (auto it : q) {
		cout << it.first  << " " << it.second << endl;
	}
}

Compilation message

pipes.cpp:83:7: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main () {
       ^

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 512 KB Output is correct
2 Incorrect 2 ms 512 KB Wrong number of edges

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 1024 KB Output is correct
2 Incorrect 6 ms 768 KB Wrong number of edges

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 154 ms 8544 KB Output is correct
2 Correct 151 ms 7896 KB Output is correct

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 2 ms 768 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 3 ms 768 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 3 ms 640 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 3 ms 768 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 2 ms 688 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 3 ms 788 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 2 ms 768 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -