Help me in solving MANYSUMS problem

help
,
1

My issue

What is the issue in the code

My code

#include<stdio.h>

int main() {
    int T, L, R;
    scanf("%d", &T);

    while (T > 0) {
        scanf("%d %d", &L, &R);
        
        // Initialize count for each test case
        int count = 1;

        // Check all combinations of pairs (i, j) in the range [L, R]
        for (int i = L; i <= R; i++) {
            for (int j = L; j <= R; j++) {
                // Check if the sum i + j is a new reachable integer
                if (i + j != i + i && i + j != j + j) {
                    count++;
                }
            }
        }

        // Print the count for the current test case
        printf("%d\n", count);

        // Decrement the number of test cases
        T--;
    }

    return 0;
}

Learning course: Level up from 1* to 2*
Problem Link: Practice Problem in - CodeChef

2

@shrutinandanwa
due to high constraints looping will give u tle
so u have to do some maths over here .
plzz refer the following code for better understanding

#include <stdio.h>
int main()
{
    int t;
    scanf("%d", &t);
    while (t--)
    {
        int l, r;
        scanf("%d%d", &l, &r);
        if (l == r)
        {
            printf("1\n");
        }
        else
        {
            printf("%d\n", (2 * r) - (2 * l) + 1);
        }
    }
    return 0;
}