Submission #933315

#	Time	Username	Problem	Language	Result	Execution time	Memory
933315		SmuggingSpun	Game (IOI14_game)	C++14	15 / 100	3 ms	11096 KiB

game

#include "game.h"
#include<bits/stdc++.h>
using namespace std;
const int lim = 1505;
int p[lim], sz[lim], cnt[lim][lim];
int find_set(int n){
	return n == p[n] ? n : p[n] = find_set(p[n]);
}
void merge(int a, int b){
	if((a = find_set(a)) != (b = find_set(b))){
		if(sz[a] < sz[b]){
			swap(a, b);
		}
		sz[p[b] = a] += sz[b]; 
	}
}
void initialize(int n){
	iota(p, p + n, 0);
	fill(sz, sz + n, 1);
	memset(cnt, 0, sizeof(cnt));
}
int hasEdge(int u, int v){
	if(sz[u = find_set(u)] * sz[v = find_set(v)] - 1 == cnt[u][v] || u == v){
		merge(u, v);
		return 1;
	}
	cnt[u][v]++;
	cnt[v][u]++;
	return 0;
}

Compilation message (stderr)

game.cpp: In function 'int hasEdge(int, int)':
game.cpp:23:32: warning: operation on 'v' may be undefined [-Wsequence-point]
   23 |  if(sz[u = find_set(u)] * sz[v = find_set(v)] - 1 == cnt[u][v] || u == v){
      |                              ~~^~~~~~~~~~~~~
game.cpp:23:32: warning: operation on 'v' may be undefined [-Wsequence-point]
game.cpp:23:10: warning: operation on 'u' may be undefined [-Wsequence-point]
   23 |  if(sz[u = find_set(u)] * sz[v = find_set(v)] - 1 == cnt[u][v] || u == v){
      |        ~~^~~~~~~~~~~~~
game.cpp:23:10: warning: operation on 'u' may be undefined [-Wsequence-point]

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