Submission #23702

#	Time	Username	Problem	Language	Result	Execution time	Memory
23702		Hiasat	Friend (IOI14_friend)	C++14	0 / 100	0 ms	3220 KiB

friend

#include "friend.h"
#include <bits/stdc++.h>

using namespace std;

vector<int> adj[1001];

int c[1001];

int f[2];

void dfs(int u , int color){
	if(c[u] != -1){
		assert(c[u] == color);
		return;
	}
	c[u] = color;
	f[color]++;
	for (int i = 0; i < adj[u].size(); ++i){
		dfs(adj[u][i],!color);
	}
}
int findSample(int n,int confidence[],int host[],int protocol[]){
	memset(c,-1,sizeof c);
	for(int i = 1 ; i <= n-1; i++){
		if(protocol[i] == 1){
			adj[host[i]].push_back(i);
			adj[i].push_back(host[i]);
		}
		if(protocol[i] == 2){
			for(int j = 0 ; j < adj[host[i]].size();j++){
				int v = adj[host[i]][j];
				adj[v].push_back(i);
				adj[i].push_back(v);
			}
		}
	}	
	int ans = 0;
	for (int i = 0; i < n; ++i){
		if(c[i] != -1)
			continue;
		memset(f,0,sizeof f);
		dfs(i,0);
		ans += max(f[0],f[1]);
	}
	return ans;
}

Compilation message (stderr)

friend.cpp: In function 'void dfs(int, int)':
friend.cpp:19:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < adj[u].size(); ++i){
                    ^
friend.cpp: In function 'int findSample(int, int*, int*, int*)':
friend.cpp:31:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int j = 0 ; j < adj[host[i]].size();j++){
                      ^

• Subtask 1: 0 / 11
• Subtask 2: 0 / 8
• Subtask 3: 0 / 8
• Subtask 4: 0 / 19
• Subtask 5: 0 / 23
• Subtask 6: 0 / 31