#include "monster.h"
#include <random>
using namespace std;
const long long N = 2e2 + 5;vector <int> save;
void rec(int l, int r, vector <int> &v) {
if (l >= r) return;
int pivot = l + rand() % (r - l + 1);
vector <int> lef, rig;
save.push_back(v[pivot]);
for (int i = l; i <= r; i ++) if (i != pivot) {
if (Query(v[pivot], v[i]))
lef.push_back(v[i]);
else
rig.push_back(v[i]);
}
lef.push_back(v[pivot]);
for (int i: rig) lef.push_back(i);
int mid = 0;
pivot = v[pivot];
for (int i = 0; i < (r - l + 1); i ++) {
if (lef[i] == pivot) mid = l + i;
v[l + i] = lef[i];
}
rec(l, mid - 1, v); rec(mid + 1, r, v);
}
vector<int> Solve(int n) {
vector<int> T(n);
for (int i = 0; i < n; i ++) T[i] = i;
rec(0, n - 1, T);
reverse(save.begin(), save.end());
for (int pivot: save) {
for (int i = 0; i < n; i ++)
if (T[i] == pivot) {
if (i == 0) {
int l = i + 1, r = i + 2;
if (Query(T[i], T[r])) swap(T[i], T[r]);
break;
}
if (i == n - 1) {
int l = i - 2, r = i - 1;
if (Query(T[l], T[i])) swap(T[l], T[i]);
break;
}
if (true) {
int l = i - 1, r = i + 1;
if (Query(T[l], T[r])) swap(T[l], T[r]);
}
}
}
vector <int> ret(n);
for (int i = 0; i < n; i ++) {
ret[T[i]] = i;
}
return ret;
}
Compilation message
monster.cpp: In function 'std::vector<int> Solve(int)':
monster.cpp:41:5: error: 'reverse' was not declared in this scope
41 | reverse(save.begin(), save.end());
| ^~~~~~~
monster.cpp:46:25: warning: unused variable 'l' [-Wunused-variable]
46 | int l = i + 1, r = i + 2;
| ^
monster.cpp:52:36: warning: unused variable 'r' [-Wunused-variable]
52 | int l = i - 2, r = i - 1;
| ^
