oj.uz

Submission #420389

# Submission time Handle Problem Language Result Execution time Memory
420389 2021-06-08T10:23:07 Z victoriad Easter Eggs (info1cup17_eastereggs) C++14
100 / 100
 31 ms 416 KB 
#include <bits/stdc++.h>
#include "grader.h"
#include <vector>
using namespace std;
int x;
void primera(int n,vector<vector<int> >&a,vector<int>&r,vector<bool>&v){
if(r.size()<x){
	r.push_back(n+1);
	v[n]=true;
for(int i:a[n]){
	if(!v[i]){
		primera(i,a,r,v);
	}
	}
}
}

void bus(int n,vector<vector<int> >&a,vector<int>&r,vector<bool>&v,vector<int>&p){
if(x!=0){
	if(p[n]==1){
	x--;
	}
	v[n]=true;
	r.push_back(n+1);
for(int i:a[n]){
	if(!v[i]){
		bus(i,a,r,v,p);
	}
}
}
}

int findEgg (int N, vector < pair < int, int > > bridges)
{   vector<vector<int> >a(N);
    for(int i=0;i<N-1;i++){
		int k=bridges[i].first;
		k--;
		int h=bridges[i].second;
		h--;
        a[k].push_back(h);
        a[h].push_back(k);
    }
   int y=N;
   if(y%2==0)y=y/2;
   else y=y/2+1;
   x=y;
   vector<int>r;
   vector<int>p(N,0);
   vector<bool>v(N,false);
   primera(0,a,r,v);
   if(query(r)==1){
	   for(int i=0;i<N;i++){
		  if(v[i]){
			   p[i]=1;
		   }
	   }
   }
   else{
	   for(int i=0;i<N;i++){
		   if(!v[i]){
			   p[i]=1;
		   }
	   }
   }
    while(y>1){
    if(y%2==0)y=y/2;
    else y=y/2+1;
    x=y;
    r.clear();
    v.assign(N,false);
    bus(0,a,r,v,p); 
    if(query(r)==1){
        for(int i=0;i<N;i++){
            if(!v[i])p[i]=0;
        }
    }
    else{
        for(int i=0;i<N;i++){
            if(v[i])p[i]=0;
        }
    }
   }
   for(int i=0;i<N;i++){
       if(p[i]==1){
           x=i+1;
           break;
       }
   }

    return x;
}

Compilation message

eastereggs.cpp: In function 'void primera(int, std::vector<std::vector<int> >&, std::vector<int>&, std::vector<bool>&)':
eastereggs.cpp:7:12: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
    7 | if(r.size()<x){
      |    ~~~~~~~~^~

Subtask #1
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 200 KB Number of queries: 4
2 Correct 1 ms 200 KB Number of queries: 4
3 Correct 1 ms 200 KB Number of queries: 4
4 Correct 1 ms 200 KB Number of queries: 4

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 348 KB Number of queries: 8
2 Correct 18 ms 340 KB Number of queries: 9
3 Correct 31 ms 328 KB Number of queries: 9
4 Correct 21 ms 344 KB Number of queries: 9

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 26 ms 416 KB Number of queries: 9
2 Correct 24 ms 340 KB Number of queries: 9
3 Correct 24 ms 328 KB Number of queries: 9
4 Correct 28 ms 332 KB Number of queries: 9