Submission #10425

#	Time	Username	Problem	Language	Result	Execution time	Memory
10425		gs14004	Cave (IOI13_cave)	C++98	0 / 100	216 ms	512 KiB

cave

#include "cave.h"

int S[5005], D[5005];

void change(int s, int e){
    for(int i=s; i<=e; i++){
        S[i] ^= 1;
    }
}
int find(int pos, int n){
    int s = 0, e = n-1;
    while (s != e) {
        int m = (s+e)/2;
        int t1 = tryCombination(S);
        change(s,m);
        int t2 = tryCombination(S);
        change(s,m);
        if(t1 != t2) e = m;
        else s = m+1;
    }
    return s;
}

void exploreCave(int n){
    for (int i=0; i<n; i++) {
        D[i] = find(i,n);
        if(tryCombination(S) == i) S[i] ^= 1;
    }
    answer(S,D);
}

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