Method ST

Data Structures/HLD.cpp:10–13

#define rc ((n << 1) | 1)
  int t[4 * N], lazy[4 * N];
  ST() {
    fill(t, t + 4 * N, -inf);
    fill(lazy, lazy + 4 * N, 0);
  }
  inline void push(int n, int b, int e) {
    if(lazy[n] == 0) return;
    t[n] = t[n] + lazy[n];