Submission #153015

#	Time	Username	Problem	Language	Result	Execution time	Memory
153015		abacaba	Game (IOI14_game)	C++14	0 / 100	2 ms	376 KiB

game

#include <iostream>
#include <stdio.h>
#include <assert.h>
#include <string.h>
#include <stdio.h>
#include <algorithm>
#include <math.h>
#include <random>
#include <bitset>
#include "game.h"
#include <string>
#include <cstring>
#include <set>
#include <vector>
#include <map>
#include <stack>
using namespace std;

#define all(x) (x).begin(), (x).end()
#define max3(a, b, c) max(a, max(b, c))
#define min3(a, b, c) min(a, min(b, c))
#define mp make_pair
#define f first
#define se second
#define pb push_back
#define ppb pop_back
#define ll long long
#define ull unsigned long long
#define cntbit(x) __builtin_popcount(x)
#define endl '\n'
#define uset unordered_set
#define umap unordered_map
#define pii pair<int, int>
#define ld long double
#define pll pair<long long, long long>

const int inf = 2e9;
const int N = 2e3 + 15;
int n, deg[N][N], sz[N], p[N];
bitset <N> comp[N], can_be[N];

void initialize(int N) {
	n = N;
	for(int i = 0; i < n; ++i) {
		for(int j = 0; j < n; ++j)
			can_be[i][j] = 1;
		p[i] = i, sz[i] = 1;
		comp[i][i] = 1;
		can_be[i][i] = 0;
	}

}

int find(int v) {
	if(v == p[v])
		return v;
	return p[v] = find(p[v]);
}

void unio(int a, int b) {
	a = find(a);
	b = find(b);
	if(a != b) {
		if(sz[a] < sz[b])
			swap(a, b);
		sz[a] += sz[b];
		p[b] = a;
		comp[a] |= comp[b];
		can_be[a] |= can_be[b];
	}
}

int hasEdge(int u, int v) {
	can_be[find(u)][v] = can_be[find(v)][u] = 0;
	if((can_be[find(u)] & comp[find(v)])._Find_first() >= n && (can_be[find(v)] & comp[find(u)])._Find_first() >= n) {
		unio(u, v);
		return 1;
	}
    return 0;
}

Compilation message (stderr)

game.cpp: In function 'int hasEdge(int, int)':
game.cpp:75:53: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if((can_be[find(u)] & comp[find(v)])._Find_first() >= n && (can_be[find(v)] & comp[find(u)])._Find_first() >= n) {
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~
game.cpp:75:109: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if((can_be[find(u)] & comp[find(v)])._Find_first() >= n && (can_be[find(v)] & comp[find(u)])._Find_first() >= n) {
                                                             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~

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