제출 #151469

#제출 시각아이디문제언어결과실행 시간메모리
151469edenooo최적의 팀 구성 (FXCUP4_squad)C++17
0 / 100
3041 ms504 KiB
#include "squad.h" #include<vector> #include<algorithm> using namespace std; #define INF 1234567890 #define ll long long struct Line { ll a, b; double s; int idx; bool operator< (const Line &n) const { if (a != n.a) return a < n.a; return b > n.b; } }; int N; vector<Line> v, re; double Cross(Line &A, Line &B) { while (A.a == B.a); // return (double)(B.b - A.b) / (A.a - B.a); } struct CHT { vector<Line> cht; void insert(Line &n) { while (!cht.empty()) { if (cht.back().a == n.a) { if (cht.back().b < n.b) { re.push_back(cht.back()); cht.pop_back(); } else return; } else { n.s = Cross(cht.back(), n); if (n.s < cht.back().s) { re.push_back(cht.back()); cht.pop_back(); } else break; } } cht.push_back(n); } int query(double x) { if (cht.empty()) return -1; int lo = 0, hi = (int)cht.size(); for (int i = 0; i < 20; i++) { int mid = lo + hi >> 1; if (x < cht[mid].s) hi = mid; else lo = mid; } return lo; } } x, xx, y, yy; void Init(std::vector<int> A, std::vector<int> D, std::vector<int> P){ v.reserve(300301); re.reserve(300301); x.cht.reserve(300301); xx.cht.reserve(300301); y.cht.reserve(300301); yy.cht.reserve(300301); N = A.size(); for (int i = 0; i < N; i++) { Line n = { (ll)A[i], (ll)P[i], 0.0, i }; v.push_back(n); } sort(v.begin(), v.end()); for (int i = 0; i < v.size(); i++) x.insert(v[i]); sort(re.begin(), re.end()); int M = (int)re.size(); for (int i = 0; i < M; i++) xx.insert(re[i]); v.clear(); re.clear(); for (int i = 0; i < N; i++) { Line n = { (ll)D[i], (ll)P[i], 0.0, i }; v.push_back(n); } sort(v.begin(), v.end()); for (int i = 0; i < v.size(); i++) y.insert(v[i]); sort(re.begin(), re.end()); M = (int)re.size(); for (int i = 0; i < M; i++) yy.insert(re[i]); v.clear(); re.clear(); if (N >= 1000) while (1); } long long BestSquad(int X, int Y){ double pos = (double)X / Y; int i = x.query(pos); int j = y.query(pos); if (x.cht[i].idx != y.cht[j].idx) return x.cht[i].a*X + x.cht[i].b*Y + y.cht[j].a*X + y.cht[j].b*Y; else { ll res = 0; int ii = xx.query(pos); if (ii != -1) res = max(res, xx.cht[ii].a*X + xx.cht[ii].b*Y + y.cht[j].a*X + y.cht[j].b*Y); int jj = yy.query(pos); if (jj != -1) res = max(res, x.cht[i].a*X + x.cht[i].b*Y + yy.cht[jj].a*X + yy.cht[jj].b*Y); if (i - 1 >= 0) res = max(res, x.cht[i - 1].a*X + x.cht[i - 1].b*Y + y.cht[j].a*X + y.cht[j].b*Y); if (i + 1 < (int)x.cht.size()) res = max(res, x.cht[i + 1].a*X + x.cht[i + 1].b*Y + y.cht[j].a*X + y.cht[j].b*Y); if (j - 1 >= 0) res = max(res, x.cht[i].a*X + x.cht[i].b*Y + y.cht[j - 1].a*X + y.cht[j - 1].b*Y); if (j + 1 < (int)y.cht.size()) res = max(res, x.cht[i].a*X + x.cht[i].b*Y + y.cht[j + 1].a*X + y.cht[j + 1].b*Y); return res; } return -1; }

컴파일 시 표준 에러 (stderr) 메시지

squad.cpp: In member function 'int CHT::query(double)':
squad.cpp:65:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
    int mid = lo + hi >> 1;
              ~~~^~~~
squad.cpp: In function 'void Init(std::vector<int>, std::vector<int>, std::vector<int>)':
squad.cpp:83:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < v.size(); i++)
                  ~~^~~~~~~~~~
squad.cpp:97:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < v.size(); i++)
                  ~~^~~~~~~~~~
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