C++ :

#include <bits/stdc++.h>
using namespace std;
map<int,int> mp;
int main(int argc, char** argv) {
	ios::sync_with_stdio(false);
	int n,x,maxn=-1;
	cin>>n;
	for(int i=1;i<=n;i++)
	{
		cin>>x;
		mp[x]++;
	}
	
	map<int,int>::iterator it;
	for(it=mp.begin();it!=mp.end();it++)
	   cout<<it->first<<" "<<it->second<<endl;
	return 0;
}

Python :

import math
import sys
n=int(input())
s=list()
for i in range(n):
    s.append(int(input()))
d=dict()
for item in s:
    if item not in d:
        d[item]=1
    else:
        d[item]=d[item]+1
lst = sorted(d.items(),key=lambda x :x[0])
for item in lst:
    print(item[0],item[1])