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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int cnt(int n){
  5.     int ans = 0;
  6.     while (n > 0){
  7.         n/=10;
  8.         ans++;
  9.     }
  10.     return ans;
  11. }
  12.  
  13. int main(){
  14.     int current, n; cin >> current >> n;
  15.     int start = current - 1;
  16.     while (n > cnt(start)){
  17.         n -= cnt(start);
  18.         start++;
  19.     }
  20.     cout << start;
  21. }
  22.  
Success #stdin #stdout 0s 5308KB
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stdin
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8 4
stdout
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10
https://ideone.com/CU1OrP
language:
C++14 (gcc 8.3)
created:
8 hours ago
visibility:
public

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