제출 #412479

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
412479	2021-05-27 01:21:09	tatyam	육각형 영역 (APIO21_hexagon)	C++17	20 / 100	2098 ms	1048580 KiB

hexagon

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#include <bits/stdc++.h>
using namespace std;
using uint = uint32_t;
constexpr uint mod = 1'000'000'007;
struct Modint{
    uint num = 0;
    Modint(){}
    template<class T> Modint(T x): num(x % mod){}
    operator int() const { return num; }
    void operator+=(Modint x){
        num += x.num;
        if(num >= mod) num -= mod;
    }
    void operator-=(Modint x){
        if(num < x.num) num += mod;
        num -= x.num;
    }
    Modint operator+(Modint x) const {
        Modint ans = *this;
        ans += x;
        return ans;
    }
    Modint operator-(Modint x) const {
        Modint ans = *this;
        ans -= x;
        return ans;
    }
    Modint operator*(Modint x) const {
        return uint((uint64_t)num * x.num % mod);
 
 
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컴파일 시 표준 에러 (stderr) 메시지

hexagon.cpp: In function 'int draw_territory5(int, Modint, Modint, std::vector<int>, std::vector<int>)':
hexagon.cpp:42:18: warning: unused variable 'dx' [-Wunused-variable]
   42 |     const Modint dx[6] = {0, sqrt3, sqrt3, 0, mod - sqrt3, mod - sqrt3}, dy[6] = {1, (mod + 1) / 2, mod - (mod + 1) / 2, -1, mod - (mod + 1) / 2, (mod + 1) / 2};
      |                  ^~
hexagon.cpp:42:74: warning: unused variable 'dy' [-Wunused-variable]
   42 |     const Modint dx[6] = {0, sqrt3, sqrt3, 0, mod - sqrt3, mod - sqrt3}, dy[6] = {1, (mod + 1) / 2, mod - (mod + 1) / 2, -1, mod - (mod + 1) / 2, (mod + 1) / 2};
      |                                                                          ^~
hexagon.cpp:44:12: warning: variable 'x' set but not used [-Wunused-but-set-variable]
   44 |     Modint x = 0, y = 0;
      |            ^
hexagon.cpp:44:19: warning: variable 'y' set but not used [-Wunused-but-set-variable]
   44 |     Modint x = 0, y = 0;
      |                   ^
hexagon.cpp: In lambda function:
hexagon.cpp:70:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   70 |         if(i == inside.size()) return 1;
      |            ~~^~~~~~~~~~~~~~~~
hexagon.cpp: In lambda function:
hexagon.cpp:80:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   80 |         if(i == outside.size()) return 1;
      |            ~~^~~~~~~~~~~~~~~~~

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