Submission #404160

#	Time	Username	Problem	Language	Result	Execution time	Memory
404160		ly20	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 = 1123;
int val[MAXN];
vector <int> grafo[MAXN];
// Find out best sample
int dp[MAXN][2];
void dfs(int v, int p) {
    dp[v][0] = 0; dp[v][1] = val[v];
    for(int i = 0; i < grafo[v].size(); i++) {
        int viz = grafo[v][i];
        if(viz == p) continue;
        dfs(viz, v);
        dp[v][0] += max(dp[viz][0], dp[viz][1]);
        dp[v][1] += dp[viz][0];
    }

}
int findSample(int n,int confidence[],int host[],int protocol[]){
    int tot = 0;
    int mx = 0;
    for(int i = 0; i < n; i++) {
        val[i] = confidence[i];
    }
    for(int i = 1; i < n - 1; i++) {
        int cur = host[i];
        grafo[i].push_back(cur);
        grafo[cur].push_back(i);
    }
    dfs(0, 0);
	return max(dp[0][0], dp[0][1]);
}

Compilation message (stderr)

friend.cpp: In function 'void dfs(int, int)':
friend.cpp:12:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |     for(int i = 0; i < grafo[v].size(); i++) {
      |                    ~~^~~~~~~~~~~~~~~~~
friend.cpp: In function 'int findSample(int, int*, int*, int*)':
friend.cpp:22:9: warning: unused variable 'tot' [-Wunused-variable]
   22 |     int tot = 0;
      |         ^~~
friend.cpp:23:9: warning: unused variable 'mx' [-Wunused-variable]
   23 |     int mx = 0;
      |         ^~

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