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  1. #include<stdio.h>
  2. int main(void)
  3. {
  4. int a;
  5. int i;
  6. int sum=0;
  7. scanf("%d",&a);
  8.  
  9. for(i=1;i<=a; i++)
  10. {
  11.   sum=sum+i;
  12. }
  13. printf("1から%dまでの和は%d",a,sum);
  14. return 0;
  15. }
  16.  
Success #stdin #stdout 0s 5320KB
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stdin
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3
stdout
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1から3までの和は6
https://ideone.com/k35CF7
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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