Submission #10427

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
10427	2014-10-27 23:39:15	gs14004	Cave (IOI13_cave)	C++98	100 / 100	479 ms	616 KiB

cave

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#include "cave.h"
#include <cstdio>
#include <cstdlib>
int S[5005], D[5005];
int visited[5005];
void change(int s, int e){
    for(int i=s; i<=e; i++){
        if(!visited[i]) S[i] ^= 1;
    }
}
int find(int pos, int n){
    int s = 0, e = n-1;
    if(tryCombination(S) != pos) change(0,n-1);
    while (s != e) {
        int m = (s+e)/2;
        change(s,m);
        int t = tryCombination(S);
        change(s,m);
        if(pos != t) e = m;
        else s = m+1;
    }
    return s;
}
void exploreCave(int n){
    for (int i=0; i<n; i++) {
        int pos = find(i,n);
 
 
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• Subtask 1: 12 / 12
• Subtask 2: 13 / 13
• Subtask 3: 21 / 21
• Subtask 4: 30 / 30
• Subtask 5: 24 / 24