#include "prize.h"
#include <stdio.h>
#include <vector>
#include <algorithm>
int L[200005], R[200005];
int V[200005];
int min(int a, int b)
{
return (a < b)?a:b;
}
int max(int a, int b)
{
return (a > b)?a:b;
}
int find_best(int n) {
int i;
for (i = 0; i < n; i++)
L[i] = -1;
int mn, md, mx;
//first sig
std::vector<int> r;
r = ask(0);
L[0] = r[0];
R[0] = r[1];
if (R[0] == 0)
return 0;
r = ask(n - 1);
L[n - 1] = r[0];
R[n - 1] = r[1];
if (L[n - 1] == 0)
return n - 1;
r = ask((n - 1)/2);
L[(n - 1)/2] = r[0];
R[(n - 1)/2] = r[1];
if (L[(n - 1)/2] == 0)
return (n - 1)/2;
r = ask((n - 1)/2 + 1);
L[(n - 1)/2 + 1] = r[0];
R[(n - 1)/2 + 1] = r[1];
if (L[(n - 1)/2 + 1] == 0)
return (n - 1)/2 + 1;
int sigl = 0, sigm1 = (n - 1)/2, sigm2 = (n - 1)/2 + 1, sigr = n - 1;
while (sigl < sigm1 || sigm2 < sigr)
{
if (sigm2 < sigr)
{
mn = sigm2;
mx = sigr;
while (mx != mn)
{
if (mx - mn == 1)
{
sigr = mn;
break;
}
md = (mn + mx)/2;
if (L[md] == -1)
{
r = ask(md);
L[md] = r[0];
R[md] = r[1];
}
if (L[md] == L[sigr] && R[md] == R[sigr])
mx = md;
else
mn = md;
}
if (L[sigr] == -1)
{
r = ask(sigr);
L[sigr] = r[0];
R[sigr] = r[1];
}
if (L[sigr] == 0 && R[sigr] == 0)
return sigr;
}
// printf("sigl %d sigr %d\n", sigl, sigr);
if (sigl < sigm1)
{
mn = sigl;
mx = sigm1;
while (mx != mn)
{
if (mx - mn == 1)
{
sigl = mx;
break;
}
md = (mn + mx)/2;
if (L[md] == -1)
{
r = ask(md);
L[md] = r[0];
R[md] = r[1];
}
if (L[md] == L[sigl] && R[md] == R[sigl])
mn = md;
else
mx = md;
}
if (L[sigl] == -1)
{
r = ask(sigl);
L[sigl] = r[0];
R[sigl] = r[1];
}
if (L[sigl] == 0 && R[sigl] == 0)
return sigl;
}
//
if (sigl < sigm1)
{
mn = sigl;
mx = sigm1;
while (mx != mn)
{
if (mx - mn == 1)
{
sigm1 = mn;
break;
}
md = (mn + mx)/2;
if (L[md] == -1)
{
r = ask(md);
L[md] = r[0];
R[md] = r[1];
}
if (L[md] == L[sigm1] && R[md] == R[sigm1])
mx = md;
else
mn = md;
}
if (L[sigm1] == -1)
{
r = ask(sigm1);
L[sigm1] = r[0];
R[sigm1] = r[1];
}
if (L[sigm1] == 0 && R[sigm1] == 0)
return sigm1;
}
// printf("sigl %d sigr %d\n", sigl, sigr);
if (sigm2 < sigr)
{
mn = sigm2;
mx = sigr;
while (mx != mn)
{
if (mx - mn == 1)
{
sigm2 = mx;
break;
}
md = (mn + mx)/2;
if (L[md] == -1)
{
r = ask(md);
L[md] = r[0];
R[md] = r[1];
}
if (L[md] == L[sigm2] && R[md] == R[sigm2])
mn = md;
else
mx = md;
}
if (L[sigm2] == -1)
{
r = ask(sigm2);
L[sigm2] = r[0];
R[sigm2] = r[1];
}
if (L[sigm2] == 0 && R[sigm2] == 0)
return sigm2;
}
}
if (sigl == sigr)
return sigl;
}
Compilation message
prize.cpp: In function 'int find_best(int)':
prize.cpp:179:1: warning: control reaches end of non-void function [-Wreturn-type]
}
^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
4368 KB |
Output is correct |
| 2 |
Incorrect |
1 ms |
4368 KB |
answer is not correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
4368 KB |
Output is correct |
| 2 |
Incorrect |
1 ms |
4368 KB |
answer is not correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
