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不解中,c就ce,c++就ac#include<stdio.h>
#include<string>
bool flag[105][105];
int num;
void DFS(int i,int j)
{
if(flag[i][j])
{
num++;
flag[i][j]=0;
DFS(i-1,j);
DFS(i+1,j);
DFS(i,j-1);
DFS(i,j+1);
}
}
int main()
{
int i,j,m,n,t,x,y,temp;
while(scanf("%d%d%d",&n,&m,&t)!=EOF)
{
memset(flag,0,sizeof(flag));
for(i=0;i<t;i++)
{
scanf("%d%d",&x,&y);
flag[x][y]=1;
}
temp=0;
for(i=1;i<=n;i++)
for(j=1;j<=m;j++)
if(flag[i][j])
{
num=0;
DFS(i,j);
if(num>temp)
temp=num;
}
printf("%d\n",temp);
}
return 0;
}
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