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>
using namespace std;
const int mxN = 1506;
int n,chu[mxN][mxN],s[mxN],c[mxN]={1};
void initialize(int n){
::n = n;
for(int i = 0; i < n; i++){
for(int j = 0; j < n; j++)
chu[i][j]=1;
}
for(int i = 1; i < n; i++)
s[i]=1;
}
int hasEdge(int u, int v){
chu[u][v]=chu[v][u]=0;
if(c[v])
swap(u,v);
if(c[u])
s[v]--;
if(!s[v]){
c[v] = 1;
for(int i = 0; i < n; i++){
if(chu[i][v])
s[i]++;
}
}
return c[v];
}
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