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  1. #include <stdio.h>
  2. int main(void) {
  3. 	int a,n,sum=0;
  4. 	scanf("%d",&n);
  5. 	for(a=1;a<=n;a++){
  6. 		sum=sum+a;
  7. 	}
  8.     printf("1から%dまでの和は%d", a,n );
  9. 	return 0;
  10. }
  11.  
Success #stdin #stdout 0s 5324KB
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stdin
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10
stdout
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1から11までの和は10
https://ideone.com/1Ddl3R
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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