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  1. #include <math.h>
  2. #include <stdio.h>
  3.  
  4. int main() {
  5.   int maks;
  6.   scanf("%d", &maks);
  7.  
  8.   for (int i = 2; i <= maks; i++) {
  9.     int prima = 1;
  10.     for (int j = 2; j <= sqrt(i); j++) {
  11.       if (i % j == 0) {
  12.         prima = 0;
  13.         break;
  14.       }
  15.     }
  16.  
  17.     if (prima) {
  18.       printf("*");
  19.     } else {
  20.       printf("%d", i);
  21.     };
  22.     if (i + 1 <= maks)
  23.       printf(" ");
  24.   }
  25. }
Success #stdin #stdout 0s 5276KB
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stdin
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10
stdout
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* * 4 * 6 * 8 9 10
https://ideone.com/vhg4Jo
language:
C (gcc 8.3)
created:
276 days ago
visibility:
public

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