Hi ,My name is Ron and I'm new here. I would very welcome some help with an exercise. Some hints and ideas would be very helpful. The exercise: I have 'n' students and 'k' sits ,and I need to build a function (in C) that need to print all the combinations ,while there are some rules: * n>=2k-1; * every two students must be divided by at least one sit; * I must use an array of STUDENTS , each cell contains only '0' or '1' ; * the function must be recursive ,and contain no 'FOR' or 'WHILE' loops. For example, n=5 ,k=2 the output would be : 00101 01001 01010 10001 10010 10100 any hints would be welcomed. 10x and good day.