Submission #429865

#	Time	Username	Problem	Language	Result	Execution time	Memory
429865		Dakto	Cave (IOI13_cave)	C++17	100 / 100	1282 ms	528 KiB

cave

#include "cave.h"
#include <bits/stdc++.h>

using namespace std;


int S[5000], D[5000];

void exploreCave(int n) {
    vector<int> switches(n,-1),indices(n,-1);


    for(int i=0; i<n; i++){
        for(int j=0; j<n; j++) S[j]=(switches[j]==1);
        bool correct=!(i!=tryCombination(S));
        vector<int> fr;
        for(int j=0; j<n; j++){
            if(switches[j]==-1) fr.push_back(j);
        }
        while(fr.size()>1){
            vector<int> v1,v2;
            for(int j=0; j<fr.size(); j++){
                if(j%2) v1.push_back(fr[j]);
                else v2.push_back(fr[j]);
            }
            for(int j=0; j<n; j++) S[j]=(switches[j]==-1?!correct:switches[j]);
            for(auto j:v1) S[j]=correct;
            if(tryCombination(S)==i) fr=v2;
            else fr=v1;
        }
        switches[fr[0]]=correct;
        indices[fr[0]]=i;
    }
    for(int j=0; j<n; j++) S[j]=(switches[j]==1);
    for(int j=0; j<n; j++) D[j]=indices[j];
    answer(S,D);
}

Compilation message (stderr)

cave.cpp: In function 'void exploreCave(int)':
cave.cpp:22:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |             for(int j=0; j<fr.size(); j++){
      |                          ~^~~~~~~~~~

• Subtask 1: 12 / 12
• Subtask 2: 13 / 13
• Subtask 3: 21 / 21
• Subtask 4: 30 / 30
• Subtask 5: 24 / 24