Method change

cpp_easygraph/classes/segment_tree.cpp:28–41

        }

        void change(int p, const int &k) {
            p += tn; this->t[p] = k; p >>= 1;
            while (p) {
                if (this->t[p<<1] < this->t[p<<1|1]) {
                    this->t[p] = this->t[p<<1];
                    this->num[p] = this->num[p<<1];
                }
                else {
                    this->t[p] = this->t[p<<1|1];
                    this->num[p] = this->num[p<<1|1];
                }
                p >>= 1;
            }
        }
};