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uva 793

並查集水題練習

[sourcecode language="cpp"]
//============================================================================
// Name : Network Connections.cpp
// Date : 2013 2013/2/16 下午6:12:09
// Author : GCA
//============================================================================
#include <iostream>
#include <cstdio>
#include <cstring>
#include <algorithm>
#include <cmath>
#include <climits>
#include <vector>
#include <set>
#include <map>
#include <queue>
#include <cctype>
#include <utility>
using namespace std;
typedef long long ll;
typedef unsigned int uint;
#define Set(a,s) memset(a,s,sizeof(a))
#define Write(w) freopen(w,"w",stdout)
#define Read(r) freopen(r,"r",stdin)
#define Pln() printf("\n")
#define I_de(x,n)for(int i=0;i<n;i++)printf("%d ",x[i]);Pln()
#define De(x)printf(#x"%d\n",x)
#define For(i,x)for(int i=0;i<x;i++)
#define CON(x,y) x##y
#define Pmz(dp,nx,ny)for(int hty=0;hty<ny;hty++){for(int htx=0;htx<nx;htx++){\
printf("%d ",dp[htx][hty]);}Pln();}
#define M 1000005
#define PII pair<int,int>
#define PB push_back
#define oo INT_MAX
#define Set_oo 0x3f
#define Is_debug true
#define debug(...) if(Is_debug)printf("DEBUG: "),printf(__VA_ARGS__)
#define FOR(it,c) for(__typeof((c).begin()) it=(c).begin();it!=(c).end();it++)
#define eps 1e-6
bool xdy(double x,double y){return x>y+eps;}
bool xddy(double x,double y){return x>y-eps;}
bool xcy(double x,double y){return x<y-eps;}
bool xcdy(double x,double y){return x<y+eps;}
int min3(int x,int y,int z){
int tmp=min(x,y);
return min(tmp,z);
}
int max3(int x,int y,int z){
int tmp=max(x,y);
return max(tmp,z);
}
int p[M];
int rank[M];
int getf(int i){
if(i!=p[i])p[i]=getf(p[i]);
return p[i];
}
void _union(int x,int y){
x=getf(x);
y=getf(y);
if(x!=y){
if(rank[x]>rank[y])p[y]=x;
else{
p[x]=y;
if(rank[x]==rank[y])rank[y]++;
}
}

}
int main() {
ios_base::sync_with_stdio(0);
int test;
scanf("%d",&test);
int n;
while(test--){
char str[10],c;
scanf("%d%*c",&n);
for(int i=0;i<=n;i++)p[i]=i;
Set(rank,0);
int ans1=0,ans2=0,x,y;
while(gets(str)){
if(str[0]=='\0')break;
sscanf(str,"%c %d%d",&c,&x,&y);
if(c=='c')_union(x,y);
else{
if(getf(x)==getf(y))ans1++;
else ans2++;
}
}
printf("%d,%d\n",ans1,ans2);
if(test)Pln();

}

}

[/sourcecode]