Submission #590725

#	Time	Username	Problem	Language	Result	Execution time	Memory
590725		keta_tsimakuridze	Friend (IOI14_friend)	C++14	35 / 100	6 ms	7504 KiB

friend

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

// Find out best sample
const int N = 3e5 + 5;
int dp[N][2], a[N];
vector<int> V[N];
void dfs(int u) {
    dp[u][1] = a[u];
    for(int i = 0; i < V[u].size(); i++) {
        dfs(V[u][i]);
        dp[u][0] += max(dp[V[u][i]][0], dp[V[u][i]][1]);
        dp[u][1] += dp[V[u][i]][0];
    }
}
int findSample(int n,int A[],int p[],int t[]){
    int t1 = 1, t2 = 1, t0 = 1;
    for(int i = 1; i < n; i++) {
        if(t[i] != 0) t0 = 0;
        if(t[i] != 1) t1 = 0;
        if(t[i] != 2) t2 = 0;
    }
    for(int i = 0; i < n; i++) a[i] = A[i];
    int ans = 0;
    if(t1) {
        for(int i = 0; i < n; i++) ans += a[i];
    }
    else if(t2) for(int i = 0; i < n; i++) ans = max(ans, a[i]);
    else if(t0) {
        for(int i = 1; i < n; i++) {
            V[p[i]].push_back(i);
        }
        dfs(0);
        ans = max(dp[0][0], dp[0][1]);
    }
    return ans;
}

Compilation message (stderr)

friend.cpp: In function 'void dfs(int)':
friend.cpp:11:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |     for(int i = 0; i < V[u].size(); i++) {
      |                    ~~^~~~~~~~~~~~~

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