OJ-Problems-Source/HDOJ/2470_autoAC.cpp

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#include<iostream>
#include<string.h>
#include<stdio.h>
#include<ctype.h>
#include<algorithm>
#include<stack>
#include<queue>
#include<set>
#include<math.h>
#include<vector>
#include<deque>
#include<list>
#define INF 0x7fffffff
#define inf 0x3f3f3f3f
#define maxn 130
using namespace std;
bool map[maxn][maxn];
int yes[maxn],no[maxn],mark[maxn];
int n,m,a,b;
bool check(int x)
{
if(yes[x]>=a&&no[x]>=b)
return 1;
for(int i=0; i<n; i++)
{
if(map[x][i])
yes[i]--;
else
no[i]--;
}
return 0;
}
int main()
{
int x,y;
int ww=1;
while(scanf("%d%d%d%d",&n,&m,&a,&b)&&(n||m||a||b))
{
memset(map,0,sizeof(map));
memset(yes,0,sizeof(yes));
memset(no,0,sizeof(no));
memset(mark,0,sizeof(mark));
for(int i=0; i<m; i++)
{
scanf("%d%d",&x,&y);
yes[x]++;
yes[y]++;
map[x][y]=map[y][x]=1;
}
for(int i=0; i<n; i++)
no[i]=n-yes[i]-1;
bool flag=1;
while(flag)
{
flag=0;
for(int i=0; i<n; i++)
{
if(mark[i])
continue;
if(!check(i))
{
mark[i]=1;
flag=1;
}
}
}
int c=0;
for(int i=0; i<n; i++)
{
if(!mark[i])
c++;
}
printf("Case #%d: %d\n",ww++,c);
}
return 0;
}