Problem p02352 (C++) — buggy submission, verdict: Time Limit Exceeded

#include <bits/stdc++.h>
using namespace std;
using lint = long long int;
template <class T = int> using V = vector<T>;
template <class T = int> using VV = V<V<T>>;
template <class T> void assign(V<T> &v, int n, const T &a = T()) {
  v.assign(n, a);
}
template <class T, class... U> void assign(V<T> &v, int n, const U &...u) {
  v.resize(n);
  for (auto &&i : v)
    assign(i, u...);
}

struct M {
  using T = struct mms {
    lint min, max, sum;
    mms(lint a = numeric_limits<lint>::max(),
        lint b = numeric_limits<lint>::min(), lint c = 0)
        : min(a), max(b), sum(c) {}
  };
  using U = struct lf {
    lint a, b;
    lf(lint a = 1, lint b = 0) : a(a), b(b) {}
  };
  static T op(const T &a, const T &b) {
    return T{min(a.min, b.min), max(a.max, b.max), a.sum + b.sum};
  }
  static void ap(T &a, const U &g, lint k) {
    a.min = g.a * a.min + g.b;
    a.max = g.a * a.max + g.b;
    if (g.a < 0)
      swap(a.min, a.max);
    a.sum = g.a * a.sum + k * g.b;
  }
  static void ap(U &f, const U &g) {
    f.a *= g.a;
    f.b = g.a * f.b + g.b;
  }
};

template <class M> struct ST {
  using T = typename M::T;
  using U = typename M::U;
  lint n;
  unordered_map<lint, T> t;
  unordered_map<lint, U> u;

  ST(lint n) : n(1LL << 8 * sizeof(lint) - __builtin_clzll(max(n - 1, 1LL))) {}

  void _ap(lint i, const U &f) {
    M::ap(t[i], f, 1 << __builtin_clzll(i) - __builtin_clzll(n));
    if (i < n)
      M::ap(u[i], f);
  }

  T get(lint l, lint r) {
    _push(l, r);
    T resl, resr;
    for (l += n, r += n; l < r; l >>= 1, r >>= 1) {
      if (l & 1)
        resl = M::op(resl, t[l++]);
      if (r & 1)
        resr = M::op(t[--r], resr);
    }
    return M::op(resl, resr);
  }

  void _push(lint l, lint r) {
    for (lint hl = 8 * sizeof(lint) - __builtin_clzll(l + n) - 1,
              hr = 8 * sizeof(lint) - __builtin_clzll(r - 1 + n) - 1;
         hr > 0; hl--, hr--) {
      lint i = r - 1 + n >> hr;
      _ap(2 * i, u[i]);
      _ap(2 * i + 1, u[i]);
      u.erase(i);
      i = l + n >> hl;
      if (i == r - 1 + n >> hr or i >= n)
        continue;
      _ap(2 * i, u[i]);
      _ap(2 * i + 1, u[i]);
      u.erase(i);
    }
  }

  void set(lint l, lint r, const U &f) {
    _push(l, r);
    for (lint i = l + n, j = r + n; i < j; i >>= 1, j >>= 1) {
      if (i & 1)
        _ap(i++, f);
      if (j & 1)
        _ap(--j, f);
    }
    for (l += n; !(l & 1);)
      l >>= 1;
    while (l >>= 1)
      t[l] = M::op(t[2 * l], t[2 * l + 1]);
    for (r += n; !(r & 1);)
      r >>= 1;
    while (r >>= 1)
      t[r] = M::op(t[2 * r], t[2 * r + 1]);
  }
};

int main() {
  cin.tie(NULL);
  ios::sync_with_stdio(false);
  int n, q;
  cin >> n >> q;
  ST<M> st(1e7);
  st.set(0, n, M::U(0, 0));
  for (int i = 0; i < q; i++) {
    int t;
    cin >> t;
    if (t) {
      int l, r;
      cin >> l >> r;
      cout << st.get(l, r + 1).min << '\\n';
    } else {
      int l, r, x;
      cin >> l >> r >> x;
      st.set(l, r + 1, M::U(1, x));
    }
  }
}


Error: TLE

Fixed submission:

#include <bits/stdc++.h>
using namespace std;
using lint = long long int;
template <class T = int> using V = vector<T>;
template <class T = int> using VV = V<V<T>>;
template <class T> void assign(V<T> &v, int n, const T &a = T()) {
  v.assign(n, a);
}
template <class T, class... U> void assign(V<T> &v, int n, const U &...u) {
  v.resize(n);
  for (auto &&i : v)
    assign(i, u...);
}

struct M {
  using T = struct mms {
    lint min, max, sum;
    mms(lint a = numeric_limits<lint>::max(),
        lint b = numeric_limits<lint>::min(), lint c = 0)
        : min(a), max(b), sum(c) {}
  };
  using U = struct lf {
    lint a, b;
    lf(lint a = 1, lint b = 0) : a(a), b(b) {}
  };
  static T op(const T &a, const T &b) {
    return T{min(a.min, b.min), max(a.max, b.max), a.sum + b.sum};
  }
  static void ap(T &a, const U &g, lint k) {
    a.min = g.a * a.min + g.b;
    a.max = g.a * a.max + g.b;
    if (g.a < 0)
      swap(a.min, a.max);
    a.sum = g.a * a.sum + k * g.b;
  }
  static void ap(U &f, const U &g) {
    f.a *= g.a;
    f.b = g.a * f.b + g.b;
  }
};

template <class M> struct ST {
  using T = typename M::T;
  using U = typename M::U;
  lint n;
  unordered_map<lint, T> t;
  unordered_map<lint, U> u;

  ST(lint n) : n(1LL << 8 * sizeof(lint) - __builtin_clzll(max(n - 1, 1LL))) {}

  void _ap(lint i, const U &f) {
    M::ap(t[i], f, 1 << __builtin_clzll(i) - __builtin_clzll(n));
    if (i < n)
      M::ap(u[i], f);
  }

  T get(lint l, lint r) {
    _push(l, r);
    T resl, resr;
    for (l += n, r += n; l < r; l >>= 1, r >>= 1) {
      if (l & 1)
        resl = M::op(resl, t[l++]);
      if (r & 1)
        resr = M::op(t[--r], resr);
    }
    return M::op(resl, resr);
  }

  void _push(lint l, lint r) {
    for (lint hl = 8 * sizeof(lint) - __builtin_clzll(l + n) - 1,
              hr = 8 * sizeof(lint) - __builtin_clzll(r - 1 + n) - 1;
         hr > 0; hl--, hr--) {
      lint i = r - 1 + n >> hr;
      _ap(2 * i, u[i]);
      _ap(2 * i + 1, u[i]);
      u.erase(i);
      i = l + n >> hl;
      if (i == r - 1 + n >> hr or i >= n)
        continue;
      _ap(2 * i, u[i]);
      _ap(2 * i + 1, u[i]);
      u.erase(i);
    }
  }

  void set(lint l, lint r, const U &f) {
    _push(l, r);
    for (lint i = l + n, j = r + n; i < j; i >>= 1, j >>= 1) {
      if (i & 1)
        _ap(i++, f);
      if (j & 1)
        _ap(--j, f);
    }
    for (l += n; !(l & 1);)
      l >>= 1;
    while (l >>= 1)
      t[l] = M::op(t[2 * l], t[2 * l + 1]);
    for (r += n; !(r & 1);)
      r >>= 1;
    while (r >>= 1)
      t[r] = M::op(t[2 * r], t[2 * r + 1]);
  }
};

int main() {
  cin.tie(NULL);
  ios::sync_with_stdio(false);
  int n, q;
  cin >> n >> q;
  ST<M> st(1e8);
  st.set(0, n, M::U(0, 0));
  for (int i = 0; i < q; i++) {
    int t;
    cin >> t;
    if (t) {
      int l, r;
      cin >> l >> r;
      cout << st.get(l, r + 1).min << '\\n';
    } else {
      int l, r, x;
      cin >> l >> r >> x;
      st.set(l, r + 1, M::U(1, x));
    }
  }
}