제출 #689902

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
689902		sudheerays123	Experimental Charges (NOI19_charges)	C++17	100 / 100	29 ms	3788 KiB

charges

#include<bits/stdc++.h>
using namespace std;
#define fast ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
#define ll long long int
const ll N = 1e5+5 , INF = 1e18 , MOD = 1e9+7;

vector<ll> par(N),len(N);

void make_set(ll n){
	for(ll i = 1; i <= n; i++){
		par[i] = i;
		len[i] = 0;
	}
}

pair<ll,ll> get(ll x){
	if(x == par[x]) return make_pair(x,0);

	pair<ll,ll> u = get(par[x]);
	par[x] = u.first;
	len[x] = (len[x]+u.second)%2;

	return make_pair(par[x],len[x]);
}

void add_edge(ll a , ll b , ll c){

	pair<ll,ll> x = get(a);
	pair<ll,ll> y = get(b);

	if(x.first == y.first) return;

	par[x.first] = y.first;
	len[x.first] = (x.second+c+y.second)%2;
}

void solve(){

	ll n,q;
	cin >> n >> q;

	make_set(n);

	while(q--){
		char x;
		ll a,b;
		cin >> x >> a >> b;

		if(x == 'R'){
			add_edge(a,b,0);
		}
		else if(x == 'A'){
			add_edge(a,b,1);
		}
		else{
			pair<ll,ll> x = get(a);
			pair<ll,ll> y = get(b);

			if(x.first != y.first) cout << "?\n";
			else{
				if((x.second+y.second)%2 == 0) cout << "R\n";
				else cout << "A\n";
			}
		}
	}

}

int main(){

	fast;

	ll tc = 1;
	// cin >> tc;
	while(tc--) solve();

	return 0;
}

• Subtask 1: 7 / 7
• Subtask 2: 11 / 11
• Subtask 3: 14 / 14
• Subtask 4: 12 / 12
• Subtask 5: 25 / 25
• Subtask 6: 31 / 31