public class AddNum {
    public static void main(String args[]) {
        int num = 99;
        int mid = num / 2 + 1;
        int sum = 0;
        int start, end;
        for (int i = 0; i < mid + 1; i++) {
            start = i;
            for (int j = i + 1; j < mid + 1; j++) {
                sum = sum + j;
                if (sum == num) {
                    end = j;
                    System.out.println(start + 1 + "-----" + end);
                }
            }
            sum = 0;
        }

    }
}

------解决方案--------------------

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Java code

public void printNums(int totalNum){
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        if( (totalNum - n*(n-1)/2)%n !=0 )
            continue;
        else{
            a = (totalNum ……