#include <bits/stdc++.h>
using namespace std;
#define edge(xxxx,yyyy) ((xxxx)*(m+5)+(yyyy))
#define oo 1e9
#define fi first
#define se second
#define sp(iiii) setprecision(iiii)
#define IO ios_base::sync_with_stdio(false); cin.tie(0)
#define ms(aaaa,xxxx) memset(aaaa,xxxx,sizeof(aaaa))
#define cntbit(xxxx) __builtin_popcount(xxxx)
#define getbit(xxxx,aaaa) (((xxxx)>>((aaaa)-1))&1)
#define totbit(xxxx) (32-__builtin_clz(xxxx))
#define totbitll(xxxx) (64-__builtin_clzll(ll(xxxx)))
typedef long double ld;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> pii;
typedef pair<pair<int,int>,int> piii;
typedef pair<long long,long long> pll;
typedef pair<pair<long long,long long>,long long> plll;
typedef pair<pair<long long,long long>,pair<long long,long long>> pllll;
typedef pair<pair<long long,long long>,bool> pllb;
const ll base=333333349;
const ll mod=1e9+7;
const ld eps=1e-5;
const ll maxn=50009;
int deg[5009],done[5009][5009];
void initialize(int _n) {
for (int i=1;i<=_n;i++) {
deg[i]=i-1;
}
}
int hasEdge(int x,int y) {
if (x>y) {
swap(x,y);
}
if (done[x][y]) {
return done[x][y]-1;
}
deg[y]--;
if (deg[y]==0) {
done[x][y]=2;
return done[x][y]-1;
}
else {
done[x][y]=1;
return done[x][y]-1;
}
}
