#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pll = pair<ll, ll>;
#define fi first
#define se second
const ll N = 5e3 + 5;
const ll blocksz = 320;
const ll mod = 1e9 + 7;
const ll inf = 1e18;
ll rep, n;
ll a[N];
bool f[N];
bool check(){
for (int i = 1; i <= n; ++i){
if (a[i] == n) return 0;
if (a[i] == 1) break;
}
if (*min_element(a + 1, a + n + 1) != 1) return 0;
if (*max_element(a + 1, a + n + 1) != n) return 0;
for (int i = 1; i <= n; ++i) f[i] = 0;
for (int i = 1; i <= n; ++i) f[a[i]] = 1;
for (int i = 1; i <= n; ++i) if (!f[i]) return 0;
return 1;
}
// ll query(ll l, ll r){
// cout << l << " " << r << endl;
// cin >> rep;
// return rep;
// }
// void answer(ll i, ll x){
// a[i] = x;
// }
void solve(){
cin >> n;
ll d = query(1, 2);
for (int i = 1; i < n; ++i){
a[1] = i;
if (a[1] - d >= 1){
a[2] = a[1] - d;
for (int i = 3; i <= n; ++i){
ll t1 = query(i - 1, i);
ll t2 = query(i - 2, i);
if (a[i - 2] > a[i - 1]){
if (t2 >= t1) a[i] = a[i - 1] + t1;
else a[i] = a[i - 1] - t1;
}else{
if (t2 < t1) a[i] = a[i - 1] + t1;
else a[i] = a[i - 1] - t1;
}
}
// for (int i = 1; i <= n; ++i) cout << a[i] << " ";
if (check()){
for (int i = 1; i <= n; ++i){
answer(i, a[i]);
}
return;
}
}
if (a[1] + d <= n){
a[2] = a[1] + d;
for (int i = 3; i <= n; ++i){
ll t1 = query(i - 1, i);
ll t2 = query(i - 2, i);
if (a[i - 2] > a[i - 1]){
if (t2 >= t1) a[i] = a[i - 1] + t1;
else a[i] = a[i - 1] - t1;
}else{
if (t2 < t1) a[i] = a[i - 1] + t1;
else a[i] = a[i - 1] - t1;
}
}
// for (int i = 1; i <= n; ++i) cout << a[i] << " ";
if (check()){
for (int i = 1; i <= n; ++i){
answer(i, a[i]);
}
return;
}
}
}
}
signed main(){
// ios_base::sync_with_stdio(0);
// cin.tie(0); cout.tie(0);
ll TC = 1; // cin >> TC;
while (TC--){
solve();
}
}
Compilation message
xylophone.cpp: In function 'void solve()':
xylophone.cpp:44:13: error: 'query' was not declared in this scope
44 | ll d = query(1, 2);
| ^~~~~
xylophone.cpp:63:26: error: 'answer' was not declared in this scope
63 | answer(i, a[i]);
| ^~~~~~
xylophone.cpp:84:26: error: 'answer' was not declared in this scope
84 | answer(i, a[i]);
| ^~~~~~
