Submission #755285

#	Time	Username	Problem	Language	Result	Execution time	Memory
755285		Godgift42	Cave (IOI13_cave)	C++14	0 / 100	48 ms	408 KiB

cave

#include "cave.h"
using namespace std;

void exploreCave(int N) {
    int s[N];
    int d[N];
    int c[N];
    for(int i=0;i<N;i++){
        s[i]=0;
        c[N]=0;
    }
    
    for(int i=0;i<N;i++){
        int e = tryCombination(s);
        if(e<i){
            for(int j=0;j<N;j++){
                if(!c[j]){
                    if(s[j]==0) s[j]++;
                    else s[j]--;
                }
            }
        }
        int l=0;int r=N-1;
        int pre=1;
        int t;
        while(l<r){
            t=(l+r)/2;
            for(int j=l;j<=t;j++){
                if(!c[j]){
                    if(s[j]==0) s[j]++;
                    else s[j]--;
                }
            }
            e = tryCombination(s);
            if(e<i) e=0;
            else e=1;
            if((e==0 and pre==1) or (e==1 and pre==0)){
                r=t;
                if(l!=r) pre=e;
            }
            else{
                l = t+1;
                if(l!=r) pre=e;
            }
        }
        d[t]=i;
        c[t]=1;
        if(e==0){
            if(s[t]==0) s[t]++;
            else s[t]--;
        }
    }

    answer(s,d);
}

Compilation message (stderr)

cave.cpp: In function 'void exploreCave(int)':
cave.cpp:49:19: warning: 't' may be used uninitialized in this function [-Wmaybe-uninitialized]
   49 |             if(s[t]==0) s[t]++;
      |                ~~~^

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