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  1. #include <stdio.h>
  2. #include<math.h>
  3. int main(void) {
  4. 	int i,j;
  5. 	int a[4];
  6. 	int sum=0;
  7. 	for(i=0;i<=2019;i++){
  8. 		n=(int)log(10)+1;
  9. 		for(j=0;j<n;j++){
  10. 			a[j]=(i/(int)pow(10,n-j-j))%10;
  11. 		}
  12. 		for(j=0;j<n;j++){
  13. 			if(a[j]==2||a[j]==0||a[j]==1||a[j]==9)
  14. 			sum=sum+i*i;
  15. 		}
  16. 	}
  17. 	printf("%d",sum);
  18. 	return 0;
  19. }
  20.  
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
prog.c: In function ‘main’:
prog.c:8:3: error: ‘n’ undeclared (first use in this function)
   n=(int)log(10)+1;
   ^
prog.c:8:3: note: each undeclared identifier is reported only once for each function it appears in
stdout
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Standard output is empty
https://ideone.com/lxmpIh
language:
C (gcc 8.3)
created:
4 years ago
visibility:
public

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