제출 #197945

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
197945	2020-01-24 11:47:51	songc	수열 (APIO14_sequence)	C++14	49 / 100	344 ms	131076 KiB

sequence

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#include <bits/stdc++.h>
using namespace std;
typedef long long LL;
typedef pair<LL,LL> pii;
int N, K;
LL S[101010];
int P[101010][220];
struct Line{
  LL m, k;
  int id;
};
bool popchk(Line a, Line b, Line c){
  return ((__int128)b.k-c.k)*(b.m-a.m) <= ((__int128)a.k-b.k)*(c.m-b.m);
}
struct ConvHull{
  vector<Line> V;
  int p;
  void push(Line l){
    if (!V.empty() && V.back().m == l.m) return;
    while (V.size()>2 && popchk(V[V.size()-2], V.back(), l)){
      V.pop_back();
      if (V.size() <= p) p--;
    }
    V.push_back(l);
  }
 
 
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컴파일 시 표준 에러 (stderr) 메시지

sequence.cpp: In member function 'void ConvHull::push(Line)':
sequence.cpp:27:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if (V.size() <= p) p--;
        ~~~~~~~~~^~~~
sequence.cpp: In member function 'pii ConvHull::read(LL)':
sequence.cpp:33:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   while (p < V.size()-1 && V[p].m*x+V[p].k <= V[p+1].m*x+V[p+1].k) p++;
          ~~^~~~~~~~~~~~
sequence.cpp: In function 'int main()':
sequence.cpp:40:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &N, &K);
  ~~~~~^~~~~~~~~~~~~~~~~
sequence.cpp:43:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld", &S[i]);
   ~~~~~^~~~~~~~~~~~~~~

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