hiho week 167 register

Ended

Participants:334

Verdict:Accepted
Score:100 / 100
Submitted:2017-09-12 10:06:04

Lang:G++

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#include<iostream>
#include<vector>
using namespace std; 
int main() {
    int n;
    cin>>n; 
    vector<int>v(n+1,0); 
    for(int i=1;i<n+1;i++){ 
        int a; 
        cin>>a; 
        v[i]=a; 
    } 
    vector<int>times(n+1,1);
    for(int i=1;i<n+1;i++){ 
        int tt=v[i]; 
        while(tt!=i){
            times[i]++; 
            tt=v[tt]; 
        }
    } 
    long long mm=times[1]; 
    for(int i=2;i<times.size();i++){
        long long b=times[i]; 
        long long c=mm%b; 
        while(c!=0){ 
            long long bb=c; 
            c=b%c; 
            b=bb;
        } 
        mm=mm*times[i]/b;
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