need a little help

[jennahello]

Heyy!
I just started learning programing and there is a little assigment that i need to do, but i cant figure out why my program is not doing what it should do. If i look at it, everything seems correct, but when i try to run it, it never stops.
I have to find minimal number m, where m=a^3+b^3=c^3+d^3. It should print out 1729, but it doesnt.
No idea how to fix this.

#include <iostream>

using namespace std;

int maks(int num1, int num2);
int main()
{
    int atgr,m,n,sk=100;

    for (int k=1; k<=sk; k++){

        for (int  l=1; l<=sk; l++){

            for (int i=1; i<=sk; i++){

                for (int  j=1; j<=sk; j++){

                    m= k*k*k + l*l*l;
                    n= j*j*j + i*i*i;

                    if(k!=l && k!=i && k!=j && l!=i && l!=j && i!=j){
                    cout<<atgr;}

                }
            }
            }
            };
    atgr=maks(m,n);

}

    int maks(int num1, int num2){
    int m;
    if (num1==num2) m=num1;
    return m;
    }