Submission #197472

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
197472	2020-01-21 12:12:28	red1108	Split the sequence (APIO14_sequence)	C++17	0 / 100	121 ms	84892 KiB

sequence

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#include<bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define fastio ios_base::sync_with_stdio(false);cin.tie(0)
#define eb emplace_back
typedef long long ll;
typedef pair<ll,ll> pll;
struct A{
  ll a, b;
  int ind;
  A(){}
  A(ll x, ll y, int z){a=x;b=y;ind=z;}
};
struct CHT{
  int top = 0;
  vector<A> line;
  void clear(){
    top = 0;
    line.clear();
  }
  double cross(A a, A b){
    return (double)(b.b-a.b)/(double)(a.a-b.a);
  }
  void add(A l){
    while(line.size()>1&&cross(line[line.size()-2], line.back())>=cross(line.back(), l)) line.pop_back();
    line.eb(l);
  }
  pll get(ll x){
    top = min(top, (int)line.size()-1);
 
 
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Compilation message (stderr)

sequence.cpp: In member function 'pll CHT::get(ll)':
sequence.cpp:31:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   while(top+1<line.size()&&cross(line[top], line[top+1])<=x) top++;
         ~~~~~^~~~~~~~~~~~
sequence.cpp: In function 'int main()':
sequence.cpp:65:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=1;i<h.size();i++) cout<<h[i]<<" ";
              ~^~~~~~~~~

• Subtask 1: 0 / 11
• Subtask 2: 0 / 11
• Subtask 3: 0 / 11
• Subtask 4: 0 / 17
• Subtask 5: 0 / 21
• Subtask 6: 0 / 29