map不会蓝？

#include <bits/stdc++.h>
using namespace std;

int n;
map<int, int>a;
int c;

int main(){
    cin >> n;
    for (int i=1;i<=n;i++){
        cin >> c;
        a[c]++;
    } 
 
    for (auto i=a.begin();i!=a.end();i++){ 
        if (i->second!=0){
            cout << i->first << " " << i->second << "\n";
        }
    }
    
    return 0; 
}