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- #include <stdio.h>
- #include <stdlib.h>
- int main()
- {
- double N,in,Sum=0,P;
- scanf("%lf",&N);
- while(1)
- {
- scanf("%lf",&in);
- if(in>=0) Sum+=in;
- else break;
- }
- P=(Sum*100)/N;
- printf("%.0lf\n",N);
- printf("%.0lf\n",Sum);
- printf("%.2lf\n",P);
- if(P>=80) printf("4");
- else if(P>=70) printf("3");
- else if(P>=60) printf("2");
- else if(P>=50) printf("1");
- else printf("0");
- return 0;
- }
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