#include <stdio.h>
int main (){
int x, y, p[50001], a, b;
p[0]=0;
for (int i = 1; i <= x; i++){
p[i]=p[i] + p[i-1];
}
while (y--){
printf ("Hari ke %d-%d: %.2f\n", a
, b
, (p
[b
]- p
[a
-1])/(b
-a
+1.0));
}
return 0;
}
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