Submission #289922

#	Time	Username	Problem	Language	Result	Execution time	Memory
289922		Atill83	Cave (IOI13_cave)	C++14	100 / 100	318 ms	760 KiB

cave

#include "cave.h"
#include <bits/stdc++.h>
using namespace std;
const int MAXN = (int) 5e3 + 5;
int s[MAXN];
int ans[MAXN];
vector<int> rest;
int D[MAXN];

void ot(int N){
    for(int i = 0; i < N; i++) cerr<<s[i]<<" ";
    cerr<<endl;
}

void exploreCave(int N) {
    /* ... */
    for(int i = 0; i < N; i++) rest.push_back(i);
    for(int i = 0; i < N; i++){
        bool st = 1;
        for(int j = 0; j < rest.size(); j++){
            s[rest[j]] = 0;
        }
        int ans = tryCombination(s);
        if(ans == -1 || ans > i){
            st = 0;
        }

        int l = 0, r = rest.size() - 1;

        while(l < r){
            int m = (l + r) / 2;
            for(int j = l; j <= m; j++){
                s[rest[j]] = st;
            }
            for(int j = m + 1; j <= r; j++)
                s[rest[j]] = !st;
            //cerr<<l<<" "<<r<<endl;
            //ot(N);
            int ans = tryCombination(s);
            if(ans == -1 || ans > i){
                r = m;
            }else{
                l = m + 1;
            }
        }
        //cerr<<st<<endl;
        //cerr<<rest[l]<<" "<<i<<endl;
        //ot(N);
        s[rest[l]] = st;
        D[rest[l]] = i;
        swap(rest[l], rest.back());
        rest.pop_back();
    }    
    answer(s, D);
}

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 j = 0; j < rest.size(); j++){
      |                        ~~^~~~~~~~~~~~~

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