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  1. #include <stdio.h>
  2. int main()
  3. {
  4. 	int a,i,sum=0;
  5.     scanf("%d",&a);
  6.  
  7. 	for ( i=1 ; i<=a; i++)
  8. 	{
  9. 		sum = sum+i;
  10.  
  11. 	}
  12. 		printf("合計：%d \n",sum);
  13.    return 0;
  14. }
Success #stdin #stdout 0.01s 5320KB
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stdin
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4
stdout
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合計：10
https://ideone.com/KeHCCL
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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