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Submission #551202

# Submission time Handle Problem Language Result Execution time Memory
551202 2022-04-20T05:24:18 Z krit3379 Easter Eggs (info1cup17_eastereggs) C++17
100 / 100
 18 ms 620 KB 
#include<bits/stdc++.h>
using namespace std;
#include"grader.h"
#define N 1000
 
int id[N],sz;
vector<int> g[N];
 
void dfs(int s,int f){
    id[++sz]=s;
    for(auto x:g[s]){
        if(x==f)continue;
        dfs(x,s);
    }
}
 
int findEgg(int n, vector<pair<int,int>> edge){
    int i,l,r,mid,flag;
    for(i=1;i<=n;i++)g[i].clear();
    for(auto [a,b]:edge){
        g[a].push_back(b);
        g[b].push_back(a);
    }
    sz=0;
    dfs(1,0);
    vector<int> v;
    l=1,r=n;
    while(l<r){
        mid=(l+r)/2;
        for(i=l;i<=mid;i++)v.push_back(id[i]);
        flag=query(v);
        if(flag){
            for(i=l;i<=mid;i++)v.pop_back();
            r=mid;
        }
        else{
            l=mid+1;
        }
    }
    return id[r];
}

Subtask #1
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB Number of queries: 4
2 Correct 1 ms 208 KB Number of queries: 4
3 Correct 1 ms 208 KB Number of queries: 4
4 Correct 1 ms 208 KB Number of queries: 4

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 348 KB Number of queries: 8
2 Correct 12 ms 352 KB Number of queries: 9
3 Correct 14 ms 620 KB Number of queries: 9
4 Correct 18 ms 336 KB Number of queries: 9

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 336 KB Number of queries: 9
2 Correct 13 ms 372 KB Number of queries: 9
3 Correct 14 ms 352 KB Number of queries: 9
4 Correct 18 ms 336 KB Number of queries: 9