제출 #968784

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
968784	2024-04-24 04:31:09	nguyentunglam	송신탑 (IOI22_towers)	C++17	23 / 100	4054 ms	10820 KiB

towers

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#include "towers.h"
#include<bits/stdc++.h>
using namespace std;
const int N = 1e5 + 10;
int h[N], lg[N], sp[20][N], L[N], R[N];
int n;
int get(int l, int r) {
  if (l > r) return -1e9;
  int k = lg[r - l + 1];
  return max(sp[k][l], sp[k][r - (1 << k) + 1]);
}
void init(int N, std::vector<int> H) {
  n = N;
  for(int i = 0; i < n; i++) h[i] = H[i];
  stack<int> st;
  for(int i = 0; i < n; i++) {
    while (!st.empty() && h[st.top()] >= h[i]) st.pop();
    L[i] = st.empty() ? -1 : st.top();
    st.push(i);
  }
  while (!st.empty()) st.pop();
  for(int i = n - 1; i >= 0; i--) {
    while (!st.empty() && h[st.top()] >= h[i]) st.pop();
    R[i] = st.empty() ? n : st.top();
    st.push(i);
 
 
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컴파일 시 표준 에러 (stderr) 메시지

towers.cpp: In function 'void init(int, std::vector<int>)':
towers.cpp:36:56: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
   36 |     sp[j][i] = max(sp[j - 1][i], sp[j - 1][i + (1 << j - 1)]);
      |                                                      ~~^~~

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