Submission #404168

#	Time	Username	Problem	Language	Result	Execution time	Memory
404168		peuch	Friend (IOI14_friend)	C++17	0 / 100	1 ms	332 KiB

friend

#include "friend.h"
#include<bits/stdc++.h>
using namespace std;

const int MAXN = 1e3 + 10;

int dp[2][MAXN];
int v[MAXN];

vector<int> ar[MAXN];

int getDP(int cur, int p);

int findSample(int n,int confidence[],int host[],int protocol[]){
	
	memset(dp, -1, sizeof(dp));
	
	for(int i = 0; i < n; i++)
		v[i] = confidence[i];
	for(int i = 1; i < n; i++)
		ar[host[i]].push_back(i);
 
	return max(getDP(0, 0), getDP(0, 1));
}

int getDP(int cur, int p){
	if(dp[cur][p] != -1) return dp[cur][p];
	dp[cur][p] = 0;
	for(int i = 0; i < ar[cur].size(); i++){
		int viz = ar[cur][i];
		dp[cur][p] += getDP(viz, !p);
		dp[cur][p] += (!p) * getDP(viz, p);
	}
	dp[cur][p] += v[cur] * p;
	return dp[cur][p];
}

Compilation message (stderr)

friend.cpp: In function 'int getDP(int, int)':
friend.cpp:29:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |  for(int i = 0; i < ar[cur].size(); i++){
      |                 ~~^~~~~~~~~~~~~~~~

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