Submission #821331

#	Time	Username	Problem	Language	Result	Execution time	Memory
821331		annabeth9680	Cave (IOI13_cave)	C++17	Compilation error	0 ms	0 KiB

cave

#include <bits/stdc++.h>
#include "cave.h"
using namespace std;
const int MAXN = 5010;
bool vis[MAXN]; int S[MAXN],match[MAXN];
void exploreCave(int N){
    for(int i = 0;i<N;++i){
        if(tryCombination(S) == i){ //this means that it should be all 1's instead of 0's
            for(int j = 0;j<N;++j){
                if(!vis[j]) S[j] = !S[j];
            }
        }
        int lo = 0, hi = N-1;
        while(lo < hi){
            int mid = (lo+hi)/2;
            for(int j = lo;j<=mid;++j){
                if(!vis[j]) S[j] = !S[j];
            }
            if(tryCombination(S) == i) r = mid;
            else lo = mid+1;
            for(int j = lo;j<=mid;++j){
                if(!vis[j]) S[j] = !S[j];
            }
        }
        vis[lo] = true;
        match[lo] = i;
    }
    answer(S,match);
}

Compilation message (stderr)

cave.cpp: In function 'void exploreCave(int)':
cave.cpp:19:40: error: 'r' was not declared in this scope
   19 |             if(tryCombination(S) == i) r = mid;
      |                                        ^