#include<stdio.h> int main() {     int a,b,sum,t;     t=0;     sum=0;     scanf("%d%d",&a,&b);     if(1<=a&&a<=b&&b<=1000000)     {         t=(b-a)+1;         for(int i=1;i<=t;i++)             {             if(i%5==0)             {                 ...