Submission #991634

#	Time	Username	Problem	Language	Result	Execution time	Memory
991634		yeediot	Cave (IOI13_cave)	C++17	100 / 100	231 ms	732 KiB

cave

#include<bits/stdc++.h>
#include "cave.h"
//#include "/Users/iantsai/Downloads/Cave problem/grader.c"
using namespace std;
void exploreCave(int n){
    int s[n], d[n], cur[n];
    bool done[n];
    memset(done, 0, sizeof(done));
    memset(cur, 0, sizeof(cur));
    for(int i=0;i<n;i++){
        for(int j=0;j<n;j++){
            if(!done[j]) cur[j] = 0;
        }
        int pos = tryCombination(cur);
        if(pos == -1) pos = n;
        bool flag = 1;
        if(pos > i){
            flag = 0;
        }
        for(int j=0;j<n;j++){
            if(!done[j]) cur[j] = !flag;
        }
        int l = 0, r = n-1;
        while(l < r){
            int mm = l+r >> 1;
            for(int j=l;j<=mm;j++){
                if(!done[j]) cur[j] = flag;
            }
            pos = tryCombination(cur);
            if(pos == -1) pos = n;
            for(int j=l;j<=mm;j++){
                if(!done[j]) cur[j] = !flag;
            }
            if(pos > i) {
                r = mm;
            }
            else{
                l = mm+1;
            }
        }
        d[l] = i;
        s[l] = flag;
        cur[l] = flag;
        done[l] = 1;
    }
    answer(s, d);
}

Compilation message (stderr)

cave.cpp: In function 'void exploreCave(int)':
cave.cpp:25:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   25 |             int mm = l+r >> 1;
      |                      ~^~

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