제출 #559819

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
559819		SSRS	Sterilizing Spray (JOI15_sterilizing)	C++14	75 / 100	663 ms	66064 KiB

sterilizing

#include <bits/stdc++.h>
using namespace std;
array<long long, 30> operator +(array<long long, 30> A, array<long long, 30> B){
  for (int i = 0; i < 31; i++){
    A[i] += B[i];
  }
  return A;
}
array<long long, 30> apply(array<long long, 30> A, int x){
  x = min(x, 30);
  for (int i = 0; i < 30 - x; i++){
    A[i] = A[i + x];
  }
  for (int i = 30 - x; i < 30; i++){
    A[i] = 0;
  }
  return A;
}
array<long long, 30> get(int x, int K){
  array<long long, 30> ans;
  ans[0] = x;
  for (int i = 0; i < 29; i++){
    ans[i + 1] = ans[i] / K;
  }
  return ans;
}
struct lazy_segment_tree{
  int N;
  vector<array<long long, 30>> ST;
  vector<int> lazy;
  lazy_segment_tree(vector<int> A, int K){
    int N2 = A.size();
    N = 1;
    while (N < N2){
      N *= 2;
    }
    ST = vector<array<long long, 30>>(N * 2 - 1);
    for (int i = 0; i < N2; i++){
      ST[N - 1 + i] = get(A[i], K);
    }
    for (int i = N2; i < N; i++){
      ST[N - 1 + i] = get(0, K);
    }
    for (int i = N - 2; i >= 0; i--){
      ST[i] = ST[i * 2 + 1] + ST[i * 2 + 2];
    }
    lazy = vector<int>(N * 2 - 1, 0);
  }
  void eval(int i){
    if (lazy[i] > 0){
      if (i < N - 1){
        lazy[i * 2 + 1] += lazy[i];
        lazy[i * 2 + 2] += lazy[i];
      }
      ST[i] = apply(ST[i], lazy[i]);
      lazy[i] = 0;
    }
  }
  void update(int i, int x, int K){
    i += N - 1;
    vector<int> X;
    X.push_back(i);
    while (X.back() > 0){
      int t = (X.back() - 1) / 2;
      X.push_back(t);
    }
    reverse(X.begin(), X.end());
    for (int t : X){
      eval(t);
      if (t < N - 1){
        eval(t * 2 + 1);
        eval(t * 2 + 2);
      }
    }
    ST[i] = get(x, K);
    while (i > 0){
      i = (i - 1) / 2;
      ST[i] = ST[i * 2 + 1] + ST[i * 2 + 2];
    }
  }
  void range_apply(int L, int R, int i, int l, int r){
    eval(i);
    if (r <= L || R <= l){
      return;
    } else if (L <= l && r <= R){
      lazy[i] = 1;
      eval(i);
    } else {
      int m = (l + r) / 2;
      range_apply(L, R, i * 2 + 1, l, m);
      range_apply(L, R, i * 2 + 2, m, r);
      ST[i] = ST[i * 2 + 1] + ST[i * 2 + 2];
    }
  }
  void range_apply(int L, int R){
    range_apply(L, R, 0, 0, N);
  }
  long long range_sum(int L, int R, int i, int l, int r){
    eval(i);
    if (r <= L || R <= l){
      return 0;
    } else if (L <= l && r <= R){
      return ST[i][0];
    } else {
      int m = (l + r) / 2;
      return range_sum(L, R, i * 2 + 1, l, m) + range_sum(L, R, i * 2 + 2, m, r);
    }
  }
  long long range_sum(int L, int R){
    return range_sum(L, R, 0, 0, N);
  }
};
int main(){
  int N, Q, K;
  cin >> N >> Q >> K;
  vector<int> C(N);
  for (int i = 0; i < N; i++){
    cin >> C[i];
  }
  lazy_segment_tree ST(C, K);
  for (int i = 0; i < Q; i++){
    int S, T, U;
    cin >> S >> T >> U;
    if (S == 1){
      T--;
      ST.update(T, U, K);
    }
    if (S == 2){
      T--;
      ST.range_apply(T, U);
    }
    if (S == 3){
      T--;
      cout << ST.range_sum(T, U) << endl;
    }
  }
}

컴파일 시 표준 에러 (stderr) 메시지

sterilizing.cpp: In function 'std::array<long long int, 30> operator+(std::array<long long int, 30>, std::array<long long int, 30>)':
sterilizing.cpp:5:10: warning: iteration 30 invokes undefined behavior [-Waggressive-loop-optimizations]
    5 |     A[i] += B[i];
sterilizing.cpp:4:21: note: within this loop
    4 |   for (int i = 0; i < 31; i++){
      |                   ~~^~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 75 / 75