C - Corporative Network UVA - 1329 （并查集）

题目链接：点击打开链接

#include<iostream>
#include<algorithm>
#include<cmath>
#include<cstdio>
#include<cstring>
#include<iomanip>
using namespace std;
int n;
int a[100000+100];
int b[100000+100];
int init()
{
for(int i=0;i<=n;i++) a[i]=i;
}
int fid(int x)
{
int num=0;
while(x!=a[x]){
num+=abs(x-a[x])%1000;
x=a[x];
}
return num;
}
int Un(int x,int y)
{
a[x]=y;
}

int main()
{
int T; cin>>T;
4000

f485

while(T--){
cin>>n;
init();
while(1){
char c; cin>>c;
if(c=='O') break;
else if(c=='E'){
int m; cin>>m;
cout<<fid(m)<<endl;
}
else if(c=='I'){
int x,y;
cin>>x>>y;
Un(x,y);
}
}
}
return 0;
}