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Find Number.cpp
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Find Number.cpp
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//{ Driver Code Starts
// Initial Template for C++
#include <bits/stdc++.h>
using namespace std;
// } Driver Code Ends
// User function Template for C++
/*
0 1 2 3 4
9 1 3 5 7
1 3 5 7 9
11 13 15 17 19
31 33 35 37 39
51 53 55 57 59
71 73 75 77 79
91 93 95 97 99
Base is 5
13%5=3 ->5
13/5=2 ->3*10+5 ->35
20%5=0 ->9
20/5-1=3 ->5*10+9 ->59
*/
class Solution
{
public:
long long findNumber(long long N)
{
long long curr = 1, ans = 0;
int arr[] = {9, 1, 3, 5, 7};
while (N)
{
ans = arr[N % 5] * curr + ans;
if (N % 5 == 0)
{
N = N / 5 - 1;
}
else
{
N = N / 5;
}
curr = curr * 10;
}
return ans;
}
};
//{ Driver Code Starts.
int main()
{
int t;
cin >> t;
while (t--)
{
long long N;
cin >> N;
Solution ob;
cout << ob.findNumber(N) << endl;
}
return 0;
}
// } Driver Code Ends