Submission 1083 | MatCom Online Grader

Id	Date	User	Problem	Result	Time	Mem	Lang
1083	20/05/2013 15:12:36	otero1991	B - Ciudad y semáforos	Accepted	484	6.4 KiB	GNU G++ 5.1.0

Code

#include <cstdio>
#include <sstream>
#include <iostream>

#include <set>
#include <map>
#include <queue>
#include <deque>
#include <vector>
#include <string>
#include <complex>
#include <cstring>

#include <ctime>
#include <cmath>
#include <cstdlib>
#include <algorithm>
using namespace std;

#define FOR(i,n) for (int i = 1; i <= (n); ++i)
#define REP(i,n) for (int i = 0; i < (n); ++i)
#define REPI(i,c) for (typeof(c.begin()) i = c.begin(); i != c.end(); ++i)
#define ALL(c) c.begin(), c.end()
#define SZ(x) ((int)(x).size())
#define MP make_pair

#define DB(x) cout << #x << " = " << x << endl;
#define CK(x) if(!(x)) cout << '(' << #x << ") is false!!!" << endl;

typedef long long int64;
typedef unsigned long long uint64;
typedef complex<int> point;
typedef pair<int, int> pii;
typedef vector<int> vi;

const int INF = 1 << 30;
const double EPS = 1e-7;
const int MAXN = 100010;

vector<int> G[MAXN];
bool used[MAXN];
int pi[MAXN];

void dfs(int s)
{
	used[s] = true;
	for(int i = 0; i < (int)G[s].size(); i++)
	{
		int v = G[s][i];
		if(v != pi[s])
		{
			pi[v] = s;
			dfs(v);
			if(used[v]) used[s] = false;
		}
	}
}

int main()
{
	ios::sync_with_stdio(false);
	int N; cin>>N;
	for(int i = 0; i < N-1; i++)
	{
		int a,b; cin>>a>>b;
		G[a-1].push_back(b-1);
		G[b-1].push_back(a-1);
	}
	dfs(0);
	int ans = 0;
	for(int i = 0; i < N; i++)
		if(used[i]) ans++;
	cout<<ans<<endl;
    return 0;
}// UH++

Judgement Details

Test 01: 0.012 0.000 2584K ok
Test 02: 0.011 0.000 2580K ok
Test 03: 0.011 0.000 2580K ok
Test 04: 0.010 0.000 2600K ok
Test 05: 0.011 0.000 2588K ok
Test 06: 0.011 0.000 2584K ok
Test 07: 0.012 0.000 2580K ok
Test 08: 0.011 0.000 2584K ok
Test 09: 0.011 0.000 2588K ok
Test 10: 0.012 0.000 2584K ok
Test 11: 0.011 0.000 2584K ok
Test 12: 0.012 0.000 2580K ok
Test 13: 0.060 0.031 3000K ok
Test 14: 0.049 0.031 3000K ok
Test 15: 0.045 0.016 3000K ok
Test 16: 0.487 0.452 6552K ok
Test 17: 0.432 0.421 6556K ok
Test 18: 0.422 0.406 6564K ok
Test 19: 0.486 0.374 6556K ok
Test 20: 0.466 0.437 6556K ok
Test 21: 0.434 0.359 6576K ok
Test 22: 0.461 0.406 6560K ok
Test 23: 0.520 0.468 6556K ok
Test 24: 0.510 0.484 6556K ok
Test 25: 0.445 0.421 6560K ok
Accepted

Matcom Online Grader