이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <bits/stdc++.h>
typedef long long ll;
#define FOR(i,x,y) for(ll i=x; i<y; i++)
#define FORNEG(i,x,y) for(ll i=x; i>y; i--)
using namespace std;
map<ll,ll> sus;
map<ll,ll> sus2;
map<ll,ll> cnts;
int main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL);
ll n,s,t;
cin >> n >> s >> t;
vector<vector<ll>> stuff;
FOR(i,0,n){
ll a,b;
cin >> a >> b;
cnts[a]++;
cnts[b]++;
stuff.push_back({a,b});
}
FOR(i,0,n){
ll a = stuff[i][0], b = stuff[i][1];
if (sus[a] == (cnts[a]+1)/2 || sus2[b] ==(cnts[b]+1)/2 || sus[a] >= sus2[a]){
cout << b << " " << a << "\n";
sus[b]++;
sus2[a]++;
}else{
cout << a << " " << b << "\n";
sus[a]++;
sus2[b]++;
}
}
// cout << "FUCK" << endl;
// FOR(i,1,t+1){
// cout << sus[i] << " " << sus2[i] << endl;
// }
}
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