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Submission #1004889

# Submission time Handle Problem Language Result Execution time Memory
1004889 2024-06-21T22:03:51 Z cpdreamer Race (IOI11_race) C++17
0 / 100
 47 ms 262144 KB 
#include "race.h"
#include<bits/stdc++.h>
using namespace std;
#define P pair
#define V vector
#define F first
#define S second
#define pb push_back
int dp[(int)5e5][500];

void dfs(int n,int p,V<P<int,int>>tree[],int k){
    dp[n][0]=0;
    for(auto u:tree[n]){
        if(u.F==p)continue;
        dfs(u.F,n,tree,k);
        for(int i=u.S;i<=k;i++){
            if(dp[u.F][i-u.S]!=-1){
                if(dp[n][i]!=-1)
                    dp[n][i]=min(dp[n][i],dp[u.F][i-u.S]+1);
                else
                    dp[n][i]=dp[u.F][i-u.S]+1;
            }
        }
    }
}
int best_path(int N, int K, int H[][2], int L[])
{
    memset(dp,-1,sizeof(dp));
    V<P<int,int>>tree[N];
    for(int i=0;i<N-1;i++){
        tree[H[i][0]].pb({H[i][1],L[i]});
        tree[H[i][1]].pb({H[i][0],L[i]});
    }
    dfs(0,-1,tree,K);
    int ans=-1;
    for(int i=0;i<N;i++){
        if(dp[i][K]!=-1) {
            if(ans!=-1)
                ans = min(dp[i][K], ans);
            else
                ans=dp[i][K];
        }
    }
    return ans;
}

Subtask #1
0 / 9.0

# Verdict Execution time Memory Grader output
1 Runtime error 47 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Runtime error 47 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #3
0 / 22.0

# Verdict Execution time Memory Grader output
1 Runtime error 47 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #4
0 / 57.0

# Verdict Execution time Memory Grader output
1 Runtime error 47 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -