#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
typedef tree<int, null_type, less<int>, rb_tree_tag,tree_order_statistics_node_update> ordered_set;
#define scan(x) do{while((x=getchar())<'0'); for(x-='0'; '0'<=(_=getchar()); x=(x<<3)+(x<<1)+_-'0');}while(0)
char _;
#define complete_unique(a) a.erase(unique(a.begin(),a.end()),a.end())
#define all(a) a.begin(),a.end()
#define println printf("\n");
#define readln(x) getline(cin,x);
#define pb push_back
#define endl "\n"
#define INT_INF 0x3f3f3f3f
#define LL_INF 0x3f3f3f3f3f3f3f3f
#define MOD 1000000007
#define mp make_pair
#define fastio cin.tie(0); cin.sync_with_stdio(0);
#define MAXN 100001
typedef unsigned long long ull;
typedef long long ll;
typedef long double ld;
typedef unordered_map<int,int> umii;
typedef pair<int,int> pii;
typedef pair<double,double> pdd;
typedef pair<ll,ll> pll;
typedef pair<int,pii> triple;
typedef int8_t byte;
mt19937 g1(time(0));
int randint(int a, int b){return uniform_int_distribution<int>(a, b)(g1);}
ll randlong(ll a,ll b){return uniform_int_distribution<long long>(a, b)(g1);}
ll gcd(ll a, ll b){return b == 0 ? a : gcd(b, a % b);}
ll lcm(ll a, ll b){return a*b/gcd(a,b);}
ll fpow(ll b, ll exp, ll mod){if(exp == 0) return 1;ll t = fpow(b,exp/2,mod);if(exp&1) return t*t%mod*b%mod;return t*t%mod;}
ll divmod(ll i, ll j, ll mod){i%=mod,j%=mod;return i*fpow(j,mod-2,mod)%mod;}
int arr[MAXN] = {2,3,4,12,6,7,1};
set<int> s;
int valid(int n, int seq[MAXN]){
int mx = 0; for(int i=0; i<n; i++) mx = max(mx,seq[i]);
for(int i=0; i<n; i++){
if(s.count(seq[i])) return 0;
s.insert(seq[i]);
}
s.clear(); for(int i=1; i<=mx; i++) s.insert(i);
priority_queue<pii> q;
for(int i=0; i<n; i++){
q.push(mp(seq[i],i));
s.erase(seq[i]);
}
while(q.size()){
pii t = q.top(); q.pop();
if(t.first <= n) continue;
int nxt = *s.rbegin();
q.push(mp(nxt,t.second));
s.erase(nxt);
seq[t.second] = nxt;
}
int idx = -1;
for(int i=0; i<n; i++)
if(seq[i] == 1)
idx = i;
rotate(seq,seq+idx,seq+n);
for(int i=1; i<n; i++)
if(seq[i] != seq[i-1]+1)
return 0;
return 1;
}
int replacement(int n, int gondolaSeq[MAXN], int replacementSeq[MAXN]);
int countReplacement(int n, int inputSeq[MAXN]);
Compilation message
/tmp/ccS1RuLT.o: In function `main':
grader.cpp:(.text.startup+0xc3): undefined reference to `countReplacement'
grader.cpp:(.text.startup+0xe2): undefined reference to `valid'
grader.cpp:(.text.startup+0x106): undefined reference to `replacement'
collect2: error: ld returned 1 exit status
