lab

/* #include <stdio.h>

int main()
{
    int num;

    printf("enter a number: ");
    scanf("%d", &num);

    if(num % 2 == 0)
    {
        printf("%d is even", num);
    }
    else
    {
        printf("%d is odd", num);
    }
    return 0;
}*/



/*#include <stdio.h>

int main()
{
    int a, b;

    printf("enter a and b: ");
    scanf("%d %d", &a, &b);

    if(a > b)
    {
        printf("%d > %d", a, b);
    }
    else if(a < b)
    {
        printf("%d < %d", a, b);
    }
    else
    {
        printf("%d = %d", a, b);
    }
    return 0;
}*/



/*#include <stdio.h>

int main()
{
    int a, b, c, largest;

    printf("enter 3 nums: ");
    scanf("%d %d %d", &a, &b, &c);

    if(a > b && a > c)
    {
        largest = a;
    }
    else if(b > a && b > c)
    {
        largest = b;
    }
    else
    {
        largest = c;
    }

    printf("largest num is %d", largest);

    return 0;
}*/



/*#include <stdio.h>

int main()
{
    int num, digit, sum = 0;

    printf("enter atlest 2 digit number: ");
    scanf("%d", &num);

    while(num > 0)
    {
        digit = num % 10;
        sum += digit;
        num /= 10;
    }

    printf("sum is %d", sum);

    return 0;
}*/



/*#include <stdio.h>

int main()
{
    int age;

    do
    {
        printf("enter your age: ");
        scanf("%d", &age);

        if(age = 0 || age < 21)
        {
            printf("you are not old enough to drink\n");
        }
        else if(age < 0 || age > 115)
        {
            printf("invalid age!\n");
        }
        else
        {
            printf("you are old enough to drink\n");
        }
    } while (1);

    return 0;
}*/




#include <stdio.h>

void main()
{
    int m, n;
    scanf("%d %d", &m, &n);

    int sum = 0;

    for(int i = m; i <= n; ++i)
    {
        sum += i;
    }
    printf("sum:%d", sum);
}

/*void main()
{
    int n;
    scanf("%d", &n);

    int a = 1;
    printf("%d\n", a);

    int q = 3;

    for(int i = 2; i <= n; ++i)
    {
        a*=q;
        printf("%d \n", a);
    }
}*/