제출 #658299

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
658299	2022-11-12 19:13:41	Richem	원 고르기 (APIO18_circle_selection)	C++14	60 / 100	3097 ms	96044 KiB

circle_selection

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#include <iostream>
#include <unordered_map>
#include <algorithm>
#include <vector>
#include <time.h>
#pragma once
#include <chrono>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
struct uint64_hash {
  static inline uint64_t rotr(uint64_t x, unsigned k) {
    return (x >> k) | (x << (8U * sizeof(uint64_t) - k));
  }
 
  static inline uint64_t hash_int(uint64_t x) noexcept {
    auto h1 = x * (uint64_t)(0xA24BAED4963EE407);
    auto h2 = rotr(x, 32U) * (uint64_t)(0x9FB21C651E98DF25);
    auto h = rotr(h1 + h2, 32U);
    return h;
  }
 
  size_t operator()(uint64_t x) const {
    static const uint64_t FIXED_RANDOM = std::chrono::steady_clock::now().time_since_epoch().count();
    return hash_int(x + FIXED_RANDOM);
  }
};
template <typename K, typename V, typename Hash = uint64_hash>
using hash_map = __gnu_pbds::gp_hash_table<K, V, Hash>;
 
 
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컴파일 시 표준 에러 (stderr) 메시지

circle_selection.cpp:6:9: warning: #pragma once in main file
    6 | #pragma once
      |         ^~~~

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