Submission #161946

#	Time	Username	Problem	Language	Result	Execution time	Memory
161946		kostia244	Game (IOI14_game)	C++14	42 / 100	1082 ms	12792 KiB

game

#include "game.h"
#include<bits/stdc++.h>
using namespace std;
using ll = long long;
using vi = vector<ll>;
struct dsu {
	vi r, p;
	map<int, int> cnt[1500];
	void init(int n) {
		r.resize(n+1);
		p.resize(n+1);
		for(int i = 0; i <= n; i++) p[i] = i;
	}
	int par(int i) {
		if(i == p[i]) return i;
		return p[i] = par(p[i]);
	}
	void unite(int u, int v) {
		u=par(u),v=par(v);
		if(u==v) return;
		if(r[u]<r[v]) swap(u, v);
		p[v] = u;
		r[u] += r[u]==r[v];
		for(auto i : cnt[v])
			cnt[u][i.first] += i.second;
		cnt[v].clear();
	}
};
#define left afsjlk
dsu x;
set<pair<int, int>> left;
int n;
void initialize(int N) {
	n=N;
	x.init(n);
	for(int i = 0; i < n; i++)
	for(int j = 0; j < n; j++)
	x.cnt[i][j]++;
}
void upd() {
	for(int i = 0; i < n; i++) {
		if(x.cnt[i].empty()) continue;
		map<int, int> t;
		for(auto j : x.cnt[i])
			t[x.par(j.first)]+=j.second;
		swap(t, x.cnt[i]);
	}
}
int hasEdge(int u, int v) {
	if(u>v)swap(u, v);
	if((u=x.par(u))==(v=x.par(v)))
    return 1;
    //cout << x.cnt[u][v] << '\n';
    int t = x.cnt[u][v];x.cnt[u][v]--, x.cnt[v][u]--;
	if(t==1) x.unite(u, v), upd();
	return t==1;
}

/*
int main() {
	cin.tie(0);
	initialize(4);
	for(int f, t, i = 0; i < 6; i++) {
		cin >> f >> t;
		cout << hasEdge(f, t) << "\n";
	}
}
*/

• Subtask 1: 15 / 15
• Subtask 2: 27 / 27
• Subtask 3: 0 / 58