Submission #1000782

#	Time	Username	Problem	Language	Result	Execution time	Memory
1000782		nomuluun	Race (IOI11_race)	C++14	21 / 100	3084 ms	11640 KiB

race

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
bool vis[200005]={0};
vector<pair<int,int>>v[200005];
ll mi=INT_MAX;
void dfs(int q, int dis, int hi, int ka){
    int m=v[q].size();
    if(dis==ka){
        if(hi<mi)mi=hi;
    }
    for(int i=0; i<m; i++){
        int k=v[q][i].first;
        ll cost=v[q][i].second;
        if(!vis[k]){
            vis[k]=1;
            dfs(k,dis+cost,hi+1,ka);
        }
    }
}
int best_path(int N, int K, int H[][2], int L[]){
    for(int i=0; i<N-1; i++){
        v[H[i][0]].push_back({H[i][1], L[i]});
        v[H[i][1]].push_back({H[i][0], L[i]});
    }
    for(int i=0; i<=N-1; i++){
        for(int i=0; i<N; i++){
            vis[i]=0;
        }
        vis[i]=1;
        dfs(i,0,0,K); //ehleh oroi distance highway
    }
    if(mi==INT_MAX)return -1;
    else return mi;
}

• Subtask 1: 9 / 9
• Subtask 2: 12 / 12
• Subtask 3: 0 / 22
• Subtask 4: 0 / 57