This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
#include "september.h"
using namespace std;
long long xorhash[6];
vector <set <int> > ShitPar;
long long RemChild[10][500003];
int solve(int n, int m, vector<int> Par, vector <vector<int> > Record){
int ans=0;
for(int i=0;i<n;i++){
for(int k=0;k<5;k++){
RemChild[k][i]=0;
}
}
for(int i=1;i<n;i++){
for(int k=0;k<m;k++){
RemChild[k][i]++;
}
}
ShitPar.clear();
for(int i=0;i<5;i++){
xorhash[i]=463222221001217544;
}
int check1,check2;
for(int i=n-2;i>=0;i--){
for(int k=0;k<m;k++){
RemChild[k][Par[Record[k][i]]]--;
if(!RemChild[k][Par[Record[k][i]]]){
ShitPar[k].erase(Par[Record[k][i]]);
}
if(RemChild[k][Record[k][i]]){
ShitPar[k].insert(Record[k][i]);
}
}
xorhash[m]=xorhash[m-1];
check1=0;
check2=0;
for(int k=0;k<m;k++){
check1|=int(ShitPar[k].size());
check2|=(xorhash[k]!=xorhash[k+1]);
}
if(!check1&&!check2){
ans++;
}
}
return ans;
}
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