# |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
336895 |
2020-12-17T07:45:37 Z |
blue |
Cave (IOI13_cave) |
C++11 |
|
0 ms |
0 KB |
#include "cave.h"
#include <iostream>
#include <vector>
using namespace std;
int* S;
int* D;
int* Q;
//switch_state, switch_door, query
void b_search(int door, int pos, int a, int b)
{
if(a == b)
{
D[a] = door;
S[a] = pos;
}
else
{
int m = (a+b)/2;
for(int i = 0; i < N; i++)
{
if(S[i] != -1) Q[i] = S[i];
else
{
if(a <= i && i <= m) Q[i] = pos;
else Q[i] = !pos;
}
}
int q = tryCombination(Q);
if(q == door) b_search(door, pos, m+1, b);
else b_search(door, pos, a, m);
}
}
void exploreCave(int N)
{
int s[N], d[N], q[N];
S = s;
D = d;
Q = q;
for(int i = 0; i < N; i++) S[i] = D[i] = -1;
for(int door = 0; door < N; door++)
{
for(int i = 0; i < N; i++)
{
if(S[i] == -1) Q[i] = 0;
else Q[i] = S[i];
}
int q = tryCombination(Q);
if(q == door)
{
//switch_pos of switch connected to door 1 = 1
b_search(door, 1, 0, N-1);
}
else
{
b_search(door, 0, 0, N-1);
}
}
answer(s, d);
}
Compilation message
cave.cpp: In function 'void b_search(int, int, int, int)':
cave.cpp:21:28: error: 'N' was not declared in this scope
21 | for(int i = 0; i < N; i++)
| ^