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## Codeforces 977A Wrong Subtraction solution in CPP

## Wrong Subtraction

#include<bits/stdc++.h>
using namespace std;
int main()
{
int n,k,r=0;
cin>>n>>k;
for(int i=1;i<=k;i++) {
r=n%10;
if(r==0)
{
n/=10;
}
else
{
n=n-1;
}
}
cout<<n;
}

## Code Explanation

**This is a C++ code that takes two integers n and k as input from the user, and then performs a loop that iterates k times. In each iteration, it does the following:
**
Calculate the remainder of n divided by 10 and store it in the variable r.
If r is equal to 0, divide n by 10.
Otherwise, subtract 1 from n.
After the loop finishes, the code prints the final value of n. [Free Code Center]
The purpose of this code is to simulate a process where you can either divide a number by 10 (if it is divisible by 10), or subtract 1 from it, and repeat this process k times. The final value of n is the result of performing this process k times.**Codeforces 977A Wrong Subtraction solution in CPP**.codeforces problem solution .
For example, if n is 432 and k is 3, the first iteration of the loop will subtract 1 from n, since the remainder of 432 divided by 10 is not equal to 0. This will make n equal to 431. The second iteration will divide n by 10, making it equal to 43. The third iteration will also divide n by 10, making it equal to 4. Therefore, the final value of n will be 4.
Note that the bits/stdc++.h header file is not a standard C++ header file and is not guaranteed to be available on all compilers. It includes all standard library header files and some non-standard ones, and is commonly used in competitive programming. It is recommended to include only the necessary header files instead of relying on this non-standard header.
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