Grade Calculator

Problem Statement

Input Format

An integer representing marks (0 to 100).

Output Format

Print the corresponding single-character grade (A, B, C, D, or F).

Constraints

0 <= Marks <= 100

Sample Input

85

Sample Output

B

Explanation

Marks 85 fall in the range [80, 90), which corresponds to grade B.

Starter Code

#include <stdio.h>

int main() {
    int marks;
    if (scanf("%d", &marks) == 1) {
        // Write your code here
    }
    return 0;
}

Limits

• Time Limit: 1s
• Memory Limit: 256MB