Submission #849789

#	Time	Username	Problem	Language	Result	Execution time	Memory
849789		JooDdae	Cave (IOI13_cave)	C++17	12 / 100	186 ms	608 KiB

cave

#include "cave.h"
#include <bits/stdc++.h>
using namespace std;

void exploreCave(int N) {
    int a[N], b[N], c[N];
    for(int i=0;i<N;i++) a[i] = b[i] = c[i] = -1;

    for(int i=0;i<N;i++) {
        vector<int> v;
        for(int j=0;j<N;j++) if(b[j] == -1) a[j] = 0, v.push_back(j);
        int re = tryCombination(a);

        int flag = (re == -1 || re > i ? 0 : 1);


        while(v.size() > 1) {
            int mid = v.size()/2;

            for(int i=0;i<v.size();i++) a[v[i]] = (i < mid) ^ flag;
            int re = tryCombination(a);
            for(int i=0;i<v.size();i++) a[v[i]] = flag;

            if(re == -1 || re > i) v = vector(v.begin()+mid, v.end());
            else v = vector(v.begin(), v.begin()+mid);
        }

        c[i] = v[0], a[c[i]] = flag, b[c[i]] = 1;
    }

    answer(a, c);
}

Compilation message (stderr)

cave.cpp: In function 'void exploreCave(int)':
cave.cpp:20:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |             for(int i=0;i<v.size();i++) a[v[i]] = (i < mid) ^ flag;
      |                         ~^~~~~~~~~
cave.cpp:22:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |             for(int i=0;i<v.size();i++) a[v[i]] = flag;
      |                         ~^~~~~~~~~

• Subtask 1: 12 / 12
• Subtask 2: 0 / 13
• Subtask 3: 0 / 21
• Subtask 4: 0 / 30
• Subtask 5: 0 / 24