#49415: iostream+map
kenny980721.tu@gmail.com
(有事直接私)
#include<iostream>
#include<map>
using namespace std;
int main() {
int n;
cin >> n;
int a;
map<int,int> mp;
while(n--) {
cin >> a;
if(mp.count(a))mp[a]++;
else mp[a]=1;
}
for(auto[a,b]:mp) {
cout << a << " " << b << endl;
}
}