Codeforces Round #497 (Div. 1) (A. Reorder the Array)

Bismillahir Rahmanir Rahim
///Author: Tanvir Ahmmad
///CSE,Islamic University,Bangladesh

#include<iostream>
#include<cstdio>
#include<algorithm>
#include<string>
#include<cstring>
#include<sstream>
#include<cmath>
#include<cstring>
#include<vector>
#include<queue>
#include<map>
#include<set>
#include<stack>
#include<vector>
#include<iterator>
#include <functional> ///sort(arr,arr+n,greater<int>()) for decrement of array
/*every external angle sum=360 degree
  angle find using polygon hand(n) ((n-2)*180)/n*/
///Floor[Log(b)  N] + 1 = the number of digits when any number is represented in base b
using namespace std;
typedef long long ll;

int main()
{
    set<ll>st;
    ll n;
    cin>>n;
    ll arr[n+3],vis[n+9],start=0,cnt=0;
    for(ll i=0;i<n;i++) cin>>arr[i],vis[i]=0,st.insert(arr[i]);
    sort(arr,arr+n);
    if(st.size()==1)
    {
        cout<<"0"<<endl;
        return 0;
    }
    for(ll i=0;i<n && start<n;i++)
        for(ll j=start;j<n;j++)
            if(arr[i]<arr[j] && vis[j]==0)
            {
                start=j,vis[j]=1,cnt++;
                break;
            }
    cout<<cnt<<endl;
    return 0;
}
///Alhamdulillah

Problem Link: https://codeforces.com/problemset/problem/1007/A

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