2177. Find Three Consecutive Integers That Sum to a Given

class Solution {
public:
    vector<long long> sumOfThree(long long num) {
        long long x;
        // as we you that x , x+1 and x+3= num  
        x=(num-3)/3;
        if(x +(x+1)+(x+2)==num)
             return {x,x+1,x+2};

        return {};
    }
};