제출 #1179922

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1179922		MarwenElarbi	Fire (JOI20_ho_t5)	C++20	0 / 100	165 ms	327680 KiB

ho_t5

#include <bits/stdc++.h>
using namespace std;
const int nax=2e5+5;
vector<int> tab(nax);
vector<int> segtree(nax*4);
void build(int pos,int l,int r){
  if(l==r){
    segtree[pos]=tab[l];
    return;
  }
  int mid=(r+l)/2;
  build(pos*2+1,l,mid);
  build(pos*2+2,mid+1,r);
  segtree[pos]=max(segtree[pos*2+1],segtree[pos*2+2]);
}
long long query(int pos,int l,int r,int left,int right){
  if(l>r||l>right||r<left) return 0;
  if(l>=left&&r<=right) return segtree[pos];
  int mid=(r+l)/2;
  return max(query(pos*2+1,l,mid,left,right),query(pos*2+2,mid+1,r,left,right));
}
int main(){
  #ifndef ONLINE_JUDGE
    freopen("input.txt","r",stdin);
    freopen("output.txt","w",stdout);
  #endif
  int n,q;
  cin>>n>>q;
  for (int i = 0; i < n; ++i)
  {
    cin>>tab[i];
  }
  build(0,0,n-1);
  while(q--){
    int x,l,r;
    cin>>x>>l>>r;
    l--;r--;
    cout << query(0,0,n-1,max(0,l-x),l)<<endl;
  }  
}

컴파일 시 표준 에러 (stderr) 메시지

ho_t5.cpp: In function 'int main()':
ho_t5.cpp:24:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |     freopen("input.txt","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
ho_t5.cpp:25:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   25 |     freopen("output.txt","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 1
• Subtask 2: 0 / 6
• Subtask 3: 0 / 7
• Subtask 4: 0 / 6
• Subtask 5: 0 / 80