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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4.  
  5. 	int num,i,c;
  6. 	for(num=1;num<25;num++){
  7. 		c=0;
  8. 		for(i=2;i<num/2;i++){
  9. 			if(num%i==0){
  10. 				c++;
  11. 				break;
  12. 			}
  13. 		}
  14. 		if(c==0&&num!=1){
  15. 			printf("%d",i);
  16. 		}
  17. 	}
  18. 	return 0;
  19. }
  20.  
Success #stdin #stdout 0s 4368KB
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22223568911
https://ideone.com/k72eki
language:
C (gcc 8.3)
created:
4 years ago
visibility:
public

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