OJ-Problems-Source/HDOJ/5285_autoAC.cpp

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#include<stdio.h>
#include<iostream>
#include<algorithm>
#include<string>
#include<string.h>
#include<math.h>
#include<limits.h>
#include<time.h>
#include<stdlib.h>
#include<map>
#include<queue>
#include<set>
#include<stack>
#include<vector>
#define LL long long
using namespace std;
int vis[100005];
vector <int> v[100005];
int bfs(int u)
{
queue <int> q;
q.push(u);
vis[u] = 0;
int res[2] = {1, 0};
while(!q.empty())
{
int tmp = q.front();
q.pop();
int len = v[tmp].size();
for(int i = 0; i < len; i++)
{
if(vis[v[tmp][i]] == -1)
{
vis[v[tmp][i]] = !vis[tmp];
q.push(v[tmp][i]);
res[vis[v[tmp][i]]]++;
}
else if(vis[v[tmp][i]] == vis[tmp])
return -1;
}
}
return max(res[0], res[1]);
}
int main()
{
int T;
while(~scanf("%d", &T))
{
while(T--)
{
int n, m;
for(int i = 0; i < 100005; i++)
v[i].clear();
memset(vis, -1, sizeof vis);
scanf("%d%d", &n, &m);
for(int i = 0; i < m; i++)
{
int a, b;
scanf("%d%d", &a, &b);
v[a].push_back(b);
v[b].push_back(a);
}
int ans = 0;
for(int j = 1; j <= n; j++)
{
if(vis[j] == -1)
{
int tmp = bfs(j);
if(tmp == -1)
{
ans = -1;
break;
}
else
{
ans += tmp;
}
}
}
if(ans == -1 || (ans == n && n < 2))
{
puts("Poor wyh");
}
else if(ans != n)
printf("%d %d\n", ans, n - ans);
else
printf("%d %d\n", ans - 1, n - ans + 1);
}
}
return 0;
}