Sakib's Problem 3

#include <stdio.h>
#include <string.h>

int main() {
    int num;
    scanf("%d", &num);
    if(num >= 0 && num <= 100) {
        if (num >= 90 && num <= 100) {
            printf("A\n");
        } else if (num >= 86 && num <= 89) {
            printf("A-\n");
        } else if (num >= 82 && num <= 85) {
            printf("B+\n");
        } else if (num >= 78 && num <= 81) {
            printf("B\n");
        } else if (num >= 74 && num <= 77) {
            printf("B-\n");
        } else if (num >= 70 && num <= 73) {
            printf("C+\n");
        } else if (num >= 66 && num <= 69) {
            printf("C\n");
        } else if (num >= 62 && num <= 65) {
            printf("C-\n");
        } else if (num >= 58 && num <= 61) {
            printf("D+\n");
        } else if (num >= 55 && num <= 57) {
            printf("D\n");
        } else {
            printf("F\n");
        }
    } else {
        printf("Wrong Input.\nEnter the number between 0 to 100.\n");
    }
}