제출 #59815

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
59815		hamzqq9	게임 (IOI14_game)	C++14	0 / 100	6 ms	1028 KiB

game

#include "game.h"
#include<bits/stdc++.h>
#define st first
#define nd second
#define mp make_pair
#define sz(x) x.size()
using namespace std;

#define N 1505

set< pair<int,int> > edge_set[N];

int ata[N],rem[N],n;

int bul(int node) {

	if(ata[node]==node) return node;

	return ata[node]=bul(ata[node]);

}

void initialize(int n) {

	::n=n;

	for(int i=0;i<n;i++) {

		for(int j=0;j<n;j++) {

			if(j==i) continue ;

			edge_set[i].insert({min(i,j),max(i,j)});

		}

		ata[i]=i;
	
	}

}

void finish(int au) {

	int node1=edge_set[au].begin()->st;
	int node2=edge_set[au].begin()->nd;

	edge_set[au].clear();

	int anode1=bul(node1);
	int anode2=bul(node2);

	if(sz(edge_set[anode1])<sz(edge_set[anode2])) swap(anode1,anode2);

	for(auto x:edge_set[anode2]) edge_set[anode1].insert(x);

	ata[anode2]=anode1;

}

int hasEdge(int u, int v) {

	int au=bul(u);
	int av=bul(v);
	
	edge_set[au].erase(edge_set[au].find({min(u,v),max(u,v)}));
	edge_set[av].erase(edge_set[av].find({min(u,v),max(u,v)}));

	if(sz(edge_set[au])==1) {

		finish(au); 
	}

	if(sz(edge_set[av])==1) {

		finish(av);

	}
	
	
}
/*
#include <cstdio>
#include <cassert>
#include "game.h"

int read_int() {
    int x;
    assert(scanf("%d", &x) == 1);
    return x;
}

int bab[N];

int fin(int node) {

	if(bab[node]==node) return node;

	return bab[node]=fin(bab[node]);

}

void bug(vector< pair<int,int> > ed) {

	for(auto x:ed) {

		printf("%d %d\n",x.st,x.nd);

	}

}

int main() {

    int n, u, v;
    n = 4;

    vector< pair<int,int> > ed;

    for(int i=0;i<4;i++) {

    	for(int j=0;j<i;j++) {

    		ed.push_back(mp(i,j));

    	}

    }

    int tot=0;

    do {

    	int comp=4;

    	for(int i=0;i<n;i++) bab[i]=i;

		initialize(n);
		for (int i = 0; i < n * (n - 1) / 2; i++) {
		    u = ed[i].st;
		    v = ed[i].nd;
		  //  printf("%d %d ",u,v);

		    int res=hasEdge(u,v);

		    if(res) {

		    	int bu=fin(u);
		    	int bv=fin(v);

		    	if(bu!=bv) {

		    		bab[bu]=bv;

		    		comp--;

		    	}

		    }

		    if(comp==1 && i<n*(n-1)/2-1) {

		    	bug(ed);

		    	return 0;

		    } 

		}

		if(comp>1) {

			bug(ed);

			return 0;

		}

	} while(next_permutation(ed.begin(),ed.end()));

    return 0;
}
*/

컴파일 시 표준 에러 (stderr) 메시지

game.cpp: In function 'int hasEdge(int, int)':
game.cpp:81:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^

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