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Source Code
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#include <bits/stdc++.h>
#include <cmath>
using namespace std;
int leng(int n){
int k=0;
while(n){
k+=1;
n=n/10;
}
return k;
}
int main()
{
int t;
cin >> t;
while(t--)
{
int n;
cin >> n;
int a[n];
for(int i=0;i<n;i++){
cin >> a[i];
}
int len[n];
int max = -1;
for(int i=0;i<n;i++){
len[i] = leng(a[i]);
if(len[i]>max){
max = len[i];
}
}
int b[n];
for(int i=0;i<n;i++){
b[i] = a[i]*pow(10,max-leng(a[i]));
}
for(int i=0;i<n;i++){
//cout<<b[i]<<" ";
}
long long int jj = 0;
for(int i=0;i<n;i++){
int q=-1;
int ma = 0;
for(int j=0;j<n;j++){
if(b[j]>ma){
ma = b[j];
q = j;
}
}
//cout<<ma<<" ";
b[q] = 0;
if(jj==0){
jj+=a[q];
//cout<<jj<<"\n";
}
else{
jj*=pow(10,len[q]);
jj+=a[q];
//cout<<jj<<"\n";
}
}
cout<<jj<<"\n";
}
}
Compiling Program...
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