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WA 可以看看
#include <iostream>
#include <algorithm>
#include <string>
#include <cstdio>
#include <cstring>
#include <cstdlib>
#include <cmath>
#include <vector>
#include<queue>
using namespace std;
#define lson ((root<<1)+1)
#define rson ((root<<1)+2)
#define MID ((l+r)>>1)
typedef long long ll;
typedef pair<int,int> P;
const int maxn=100004;
const int base=1000;
const int inf=999999;
int a[maxn*3],rank[maxn*3];
void build(int n)
{
for(int i=0;i<n;i++)
{
a[i]=i;
rank[i]=0;
}
}
int find(int n)
{
if(a[n]!=n)a[n]=find(a[n]);
return a[n];
}
void add(int x,int y)
{
x=find(x);
y=find(y);
if(y==x)return;
if(rank[x]<rank[y])
a[x]=y;
else
{
a[y]=x;
if(rank[x]==rank[y])
rank[x]++;
}
}
bool same(int x,int y)
{
return find(x)==find(y);
}
int T[maxn],X[maxn],Y[maxn];
int main()
{
int n,m,k,i,j,t;scanf("%d%d",&n,&k);//单组输入 否则会WA
//while(~))
//{
for(i=0;i<k;i++)
{
scanf("%d%d%d",&T[i],&X[i],&Y[i]);
}
build(n*3);
int ans=0;
for(i=0;i<k;i++)
{
t=T[i];
int x=X[i]-1,y=Y[i]-1;
if(x<0||x>=n||y<0||y>=n)
{
ans++;
continue;
}
if(t==1)
{
if(same(x,y+n)||same(x,y+2*n))
{
ans++;
}
else
{
add(x,y);
add(x+n,y+n);
add(x+2*n,y+2*n);
}
}
else
{
if(same(x,y)||same(x,y+2*n))
ans++;
else
{
add(x,y+n);
add(x+n,y+2*n);
add(x+2*n,y);
}
}
}
printf("%d\n",ans);
// }
return 0;
}
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