Sum of consecutive numers

[Nhân Trần]

Here is what i am attempting to do:

#include <stdlib.h>
#include <stdio.h>


int main()
{
    int t,i,j,k;
    scanf("%d", &t); // so test


    long int n[t+1], s=0;
    for(i=1; i<=t; i++)
        scanf("%li", &n[i]);
    for(i=1; i<=t; i++)
    {
        for(j=1; j<n[i]/2+1; j++)
        {
            for(k=j; k<=n[i]/2+1; k++)
            {
                long int a[n[i]/2+1];
                s = s+k;
                a[k] = k;
                if(s == n[i])
                {
                    printf("%li = ", n[i]);
                    for(k=j; k<=n[i]/2; k++)
                        printf("%li + ", a[k]);
                    break;
                }
                if(s > n[i])
                    break;




            }


        }
        if(s> n[i])
            printf("IMPOSSIBLE");
        printf("\n");


    }


    return 0;
}

Can u show me where i was wrong or give me some suggestions?
Thanks.

[laserlight]

What is the algorithm that you have in mind?