A small college offers 253 different classes. No two classes can meet at the same time in the same room, of course. There are 13 different time slots at which classes can occur. What is the minimum number of classrooms needed to accommodate all the classes

Cprogram to find //perimeter of rectangle printf(" \n perimeter of rectangle \n"); printf(""); printf("\n enter width and length of the rectangle : "); scanf("%f%f", & width,& length); perimeter = 2 * (width + length); printf("perimeter of rectangle is: %.3f", perimeter);