Method init

cpp_easygraph/classes/segment_tree.cpp:15–26

            this->num = std::vector<int>(size+1 , 0);
        }
        void init(int N) {
            for(int i = 0; i < size; i++){
                this->t[i] = INT_MAX;
                this->num[i] = 0;
            }
            
            tn = 1;
            while(tn < N) tn <<= 1;
            --tn;
            for (int i = 1; i <= N; ++i)
                this->num[i + tn] = i;
        }

        void change(int p, const int &k) {
            p += tn; this->t[p] = k; p >>= 1;