#include "permutation.h"
#include <cstring>
#include <vector>
using namespace std;
typedef vector<int> vi;
const int N = 256;
unsigned int X = 12345;
int rand_() {
return (X *= 3) >> 1;
}
int abs_(int a) { return a > 0 ? a : -a; }
int min(int a, int b) { return a < b ? a : b; }
int max(int a, int b) { return a > b ? a : b; }
int rr[N], dd[N], ss[N];
char usedl[N * 2 + 1], usedr[N * 2 + 1];
void solve(int n) {
for (int i = 0; i < n; i++)
rr[i] = i;
for (int i = 0; i < n; i++) {
int j = rand_() % (i + 1), tmp;
tmp = rr[i], rr[i] = rr[j], rr[j] = tmp;
}
vi ii(n);
for (int i = 0; i < n; i++) {
for (int h = 0; h < n; h++)
ii[h] = rr[(i + h) % n] + 1;
dd[i] = query(ii);
}
int sum = 0;
for (int i = 0; i < n; i++)
sum += dd[i];
sum /= (n - 1);
for (int i = 0; i < n; i++)
dd[i] = sum - dd[i];
memset(ss, 0, n * sizeof *ss);
for (int t = 0; t < n; t++)
for (int i = 1; i + 1 < n; i++)
if (ss[i + 1] == 0) {
memset(usedl, 0, (n * 2 + 1) * sizeof *usedl);
ss[i + 1] = 1;
int lmn = 0, lmx = 0;
for (int h = i, s = -1, l = 0; h > 0 && ss[h + 1]; h--) {
s *= ss[h + 1], l += s == 1 ? dd[h] : -dd[h], lmn = min(lmn, l), lmx = max(lmx, l);
usedl[n + l] = 1;
}
memset(usedr, 0, (n * 2 + 1) * sizeof *usedr);
int rmn = 0, rmx = 0;
for (int j = i + 1, s = 1, r = 0; j < n && ss[j]; j++) {
s *= ss[j], r += s == 1 ? dd[j] : -dd[j], rmn = min(rmn, r), rmx = max(rmx, r);
usedr[n + r] = 1;
}
ss[i + 1] = 0;
if (lmx - rmn >= n || rmx - lmn >= n)
ss[i + 1] = -1;
else if (lmx - -rmx >= n || -rmn - lmn >= n)
ss[i + 1] = 1;
else
for (int x = -n; x <= n; x++) {
if (usedl[n + x] && usedr[n + x]) {
ss[i + 1] = -1;
break;
}
if (usedl[n + x] && usedr[n - x]) {
ss[i + 1] = 1;
break;
}
}
}
vi pp(n), qq(n);
pp[0] = 0, pp[1] = dd[1];
for (int i = 2; i < n; i++)
if (ss[i])
pp[i] = pp[i - 1] + ((pp[i - 2] < pp[i - 1]) == (ss[i] == 1) ? dd[i] : -dd[i]);
else {
for (int h = 0; h < n; h++)
ii[h] = rr[h < i ? i - 1 - h : h] + 1;
pp[i] = query(ii) - (sum - dd[0]) + dd[i];
if (abs_(pp[i] - pp[i - 1]) != dd[i])
pp[i] = -pp[i];
}
int p = 0;
for (int i = 0; i < n; i++)
p = min(p, pp[i]);
for (int i = 0; i < n; i++)
pp[i] -= p - 1;
for (int i = 0; i < n; i++)
qq[rr[i]] = pp[i];
for (int i = 0; i < n; i++)
pp[i] = qq[i];
answer(pp);
}
Compilation message
In file included from permutation.c:1:
permutation.h:1:10: fatal error: vector: No such file or directory
1 | #include <vector>
| ^~~~~~~~
compilation terminated.
In file included from stub.c:1:
stub.c:5:24: error: initializer element is not constant
5 | static FILE *fifo_in = stdin, *fifo_out = stdout;
| ^~~~~
stub.c:5:43: error: initializer element is not constant
5 | static FILE *fifo_in = stdin, *fifo_out = stdout;
| ^~~~~~
stub.c: In function 'query':
stub.c:16:3: warning: ignoring return value of 'fscanf' declared with attribute 'warn_unused_result' [-Wunused-result]
16 | fscanf(fifo_in, "%d", &x);
| ^~~~~~~~~~~~~~~~~~~~~~~~~
stub.c: In function 'main':
stub.c:36:3: warning: ignoring return value of 'fscanf' declared with attribute 'warn_unused_result' [-Wunused-result]
36 | fscanf(fifo_in, "%d", &N);
| ^~~~~~~~~~~~~~~~~~~~~~~~~
