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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. string Sum(string n , string m) {
  5.     string num = m;
  6.     // make the length of num and n in the same size
  7.     while (n.length() < num.length()) {
  8.         n = "0" + n;
  9.     }
  10.     while (n.length() > num.length()) {
  11.         num = "0" + num;
  12.     }
  13.     int curry = 0;
  14.     string result = "";
  15.     for (int i = n.length() - 1; i >= 0; i--) {
  16.         int x = (n[i] - '0') + (num[i] - '0') + curry;
  17.         char a = (x%10)+'0';
  18.         result = a + result;
  19.         curry = x / 10;
  20.     }
  21.     if (curry != 0){
  22.         char a = curry+'0';
  23.         result = a + result;
  24.     }
  25.     return result;
  26. }
  27. string multi(string n ){
  28. string result = "";
  29. int curry = 0;
  30. for(int i = n.length()-1 ; i>=0 ; i--){
  31.     int x = ((n[i]-'0')*9) + curry;
  32.     char a = (x%10)+'0';
  33.     result = a + result;
  34.     curry = x/10;
  35. }
  36. if(curry != 0){
  37.     char a = curry + '0';
  38.     result = a + result;
  39. }
  40. int t = 3;
  41. string k = result;
  42. while(t--){
  43.     string secondNum = k+"0";
  44.     k = Sum(result , secondNum);
  45.     //cout << secondNum << " " << k << endl;
  46. }
  47. return k;
  48. }
  49. int main() {
  50.     string n , a = "9999";
  51.     cin >> n;
  52.     cout << Sum(n,a) << endl << multi(n);
  53. }
  54.  
Success #stdin #stdout 0.01s 5280KB
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stdin
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Standard input is empty
stdout
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9999
000
https://ideone.com/HhVMyS
language:
C++ (gcc 8.3)
created:
3 days ago
visibility:
public

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