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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. const int MAX_SIZE = 20;
  5. const int TEN = 10;
  6.  
  7. void multiply(int a[], int x, int product[]) {
  8.     for (int i = 1; i <= a[0]; ++i) {
  9.         product[i] += a[i] * x;
  10.         product[i + 1] += product[i] / TEN;
  11.         product[i] %= TEN;
  12.         int j = i; 
  13.         while (product[j + 1] >= TEN) {
  14.             ++j;
  15.             if (product[0] < j) {
  16.                 ++product[0];
  17.             }
  18.             product[j + 1] += product[j] / TEN;
  19.             product[j] %= TEN;
  20.         }
  21.     }
  22.     if (product[product[0] + 1]) {
  23.     	++product[0];
  24.     }
  25. }
  26.  
  27. int main() {
  28.     int a[MAX_SIZE + 1] = {0}, x, product[MAX_SIZE + 1] = {0};
  29.     for (int i = 0; i <= a[0]; ++i) {
  30.         cin >> a[i];
  31.     }
  32.     cin >> x;
  33.     multiply(a, x, product);
  34.     for (int i = 0; i <= product[0]; ++i) {
  35.         cout << product[i] << ' ';
  36.     }
  37.     return 0;
  38. }
Success #stdin #stdout 0s 5292KB
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https://ideone.com/RkRizt
language:
C++ (gcc 8.3)
created:
4 days ago
visibility:
public

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