結果
問題 | No.826 連絡網 |
ユーザー | satanic |
提出日時 | 2020-03-30 20:57:17 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 7 ms / 2,000 ms |
コード長 | 5,975 bytes |
コンパイル時間 | 1,256 ms |
コンパイル使用メモリ | 130,832 KB |
実行使用メモリ | 6,944 KB |
最終ジャッジ日時 | 2024-06-23 02:55:17 |
合計ジャッジ時間 | 2,138 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
6,812 KB |
testcase_01 | AC | 1 ms
6,940 KB |
testcase_02 | AC | 2 ms
6,940 KB |
testcase_03 | AC | 2 ms
6,940 KB |
testcase_04 | AC | 2 ms
6,944 KB |
testcase_05 | AC | 2 ms
6,940 KB |
testcase_06 | AC | 1 ms
6,940 KB |
testcase_07 | AC | 1 ms
6,944 KB |
testcase_08 | AC | 2 ms
6,944 KB |
testcase_09 | AC | 2 ms
6,944 KB |
testcase_10 | AC | 1 ms
6,940 KB |
testcase_11 | AC | 2 ms
6,940 KB |
testcase_12 | AC | 6 ms
6,940 KB |
testcase_13 | AC | 4 ms
6,940 KB |
testcase_14 | AC | 5 ms
6,940 KB |
testcase_15 | AC | 2 ms
6,944 KB |
testcase_16 | AC | 3 ms
6,944 KB |
testcase_17 | AC | 3 ms
6,940 KB |
testcase_18 | AC | 2 ms
6,940 KB |
testcase_19 | AC | 6 ms
6,944 KB |
testcase_20 | AC | 6 ms
6,940 KB |
testcase_21 | AC | 1 ms
6,940 KB |
testcase_22 | AC | 3 ms
6,940 KB |
testcase_23 | AC | 4 ms
6,944 KB |
testcase_24 | AC | 3 ms
6,944 KB |
testcase_25 | AC | 7 ms
6,940 KB |
testcase_26 | AC | 2 ms
6,940 KB |
testcase_27 | AC | 6 ms
6,944 KB |
testcase_28 | AC | 5 ms
6,944 KB |
testcase_29 | AC | 3 ms
6,940 KB |
testcase_30 | AC | 7 ms
6,940 KB |
testcase_31 | AC | 4 ms
6,944 KB |
ソースコード
// need #include <iostream> #include <algorithm> // data structure #include <bitset> #include <map> #include <queue> #include <set> #include <stack> #include <string> #include <utility> #include <vector> #include <complex> //#include <deque> #include <valarray> #include <unordered_map> #include <unordered_set> #include <array> // stream //#include <istream> #include <sstream> //#include <ostream> #include <fstream> // etc #include <cassert> #include <cmath> #include <functional> #include <iomanip> #include <chrono> #include <random> #include <numeric> // input #define INIT std::ios::sync_with_stdio(false);std::cin.tie(0); #define VAR(type, ...)type __VA_ARGS__;MACRO_VAR_Scan(__VA_ARGS__); template<typename T> void MACRO_VAR_Scan(T& t) { std::cin >> t; } template<typename First, typename...Rest>void MACRO_VAR_Scan(First& first, Rest& ...rest) { std::cin >> first; MACRO_VAR_Scan(rest...); } #define VEC_ROW(type, n, ...)std::vector<type> __VA_ARGS__;MACRO_VEC_ROW_Init(n, __VA_ARGS__); for(int w_=0; w_<n; ++w_){MACRO_VEC_ROW_Scan(w_, __VA_ARGS__);} template<typename T> void MACRO_VEC_ROW_Init(int n, T& t) { t.resize(n); } template<typename First, typename...Rest>void MACRO_VEC_ROW_Init(int n, First& first, Rest& ...rest) { first.resize(n); MACRO_VEC_ROW_Init(n, rest...); } template<typename T> void MACRO_VEC_ROW_Scan(int p, T& t) { std::cin >> t[p]; } template<typename First, typename...Rest>void MACRO_VEC_ROW_Scan(int p, First& first, Rest& ...rest) { std::cin >> first[p]; MACRO_VEC_ROW_Scan(p, rest...); } #define VEC(type, c, n) std::vector<type> c(n);for(auto& i:c)std::cin>>i; #define MAT(type, c, m, n) std::vector<std::vector<type>> c(m, std::vector<type>(n));for(auto& R:c)for(auto& w:R)std::cin>>w; // output #define OUT(dist) std::cout<<(dist); #define FOUT(n, dist) std::cout<<std::fixed<<std::setprecision(n)<<(dist); #define SOUT(n, c, dist) std::cout<<std::setw(n)<<std::setfill(c)<<(dist); #define SP std::cout<<" "; #define TAB std::cout<<"\t"; #define BR std::cout<<"\n"; #define SPBR(w, n) std::cout<<(w + 1 == n ? '\n' : ' '); #define ENDL std::cout<<std::endl; #define FLUSH std::cout<<std::flush; #define SHOW(dist) {std::cerr << #dist << "\t:" << (dist) << "\n";} #define SHOWVECTOR(v) {std::cerr << #v << "\t:";for(const auto& xxx : v){std::cerr << xxx << " ";}std::cerr << "\n";} #define SHOWVECTOR2(v) {std::cerr << #v << "\t:\n";for(const auto& xxx : v){for(const auto& yyy : xxx){std::cerr << yyy << " ";}std::cerr << "\n";}} #define SHOWQUEUE(a) {auto tmp(a);std::cerr << #a << "\t:";while(!tmp.empty()){std::cerr << tmp.front() << " ";tmp.pop();}std::cerr << "\n";} // utility #define ALL(a) (a).begin(),(a).end() #define FOR(w, a, n) for(int w=(a);w<(n);++w) #define RFOR(w, a, n) for(int w=(n)-1;w>=(a);--w) #define REP(w, n) for(int w=0;w<int(n);++w) #define RREP(w, n) for(int w=int(n)-1;w>=0;--w) #define IN(a, x, b) (a<=x && x<b) template<class T> inline T CHMAX(T & a, const T b) { return a = (a < b) ? b : a; } template<class T> inline T CHMIN(T& a, const T b) { return a = (a > b) ? b : a; } #define EXCEPTION(msg) throw std::string("Exception : " msg " [ in ") + __func__ + " : " + std::to_string(__LINE__) + " lines ]" #define TRY(cond, msg) try {if (cond) EXCEPTION(msg);}catch (std::string s) {std::cerr << s << std::endl;} //void CHECKTIME(std::function<void()> f) { auto start = std::chrono::system_clock::now(); f(); auto end = std::chrono::system_clock::now(); auto res = std::chrono::duration_cast<std::chrono::nanoseconds>((end - start)).count(); std::cerr << "[Time:" << res << "ns (" << res / (1.0e9) << "s)]\n"; } // test template<class T> using V = std::vector<T>; template<class T> using VV = V<V<T>>; template<typename S, typename T> std::ostream& operator<<(std::ostream& os, std::pair<S, T> p) { os << "(" << p.first << ", " << p.second << ")"; return os; } #define random_shuffle "USE std::shuffle!"; // type/const #define int ll using ll = long long; using ull = unsigned long long; using ld = long double; using PAIR = std::pair<int, int>; using PAIRLL = std::pair<ll, ll>; constexpr int INFINT = (1 << 30) - 1; // 1.07x10^ 9 constexpr int INFINT_LIM = (1LL << 31) - 1; // 2.15x10^ 9 constexpr ll INFLL = 1LL << 60; // 1.15x10^18 constexpr ll INFLL_LIM = (1LL << 62) - 1 + (1LL << 62); // 9.22x10^18 constexpr double EPS = 1e-10; constexpr int MOD = 1000000007; constexpr double PI = 3.141592653589793238462643383279; template<class T, size_t N> void FILL(T(&a)[N], const T & val) { for (auto& x : a) x = val; } template<class ARY, size_t N, size_t M, class T> void FILL(ARY(&a)[N][M], const T & val) { for (auto& b : a) FILL(b, val); } template<class T> void FILL(std::vector<T> & a, const T & val) { for (auto& x : a) x = val; } template<class ARY, class T> void FILL(std::vector<std::vector<ARY>> & a, const T & val) { for (auto& b : a) FILL(b, val); } // ------------>8------------------------------------->8------------ std::vector<int> Eratosthenes(int n) { std::vector<bool> num(n, true); std::vector<int> prime; num[0] = false; for (int i = 0; i * i < n; ++i) { if (num[i]) { for (int j = 2; (i + 1) * j <= n; ++j) { num[(i + 1) * j - 1] = false; } } } for (int i = 0; i < n; ++i) { if (num[i]) { prime.push_back(i + 1); } } return prime; } std::vector<std::pair<ll, ll>> primeFact(ll n) { std::vector<std::pair<ll, ll>> result; for (ll i = 2; i * i <= n; ++i) { int divCount = 0; if (n % i == 0) { do { ++divCount; n /= i; } while (n % i == 0); result.emplace_back(i, divCount); } } if (n != 1) result.emplace_back(n, 1); return result; } signed main() { INIT; VAR(int, n, p); if (p == 1) { OUT(1)BR; return 0; } auto pv(primeFact(p)); auto ev(Eratosthenes(n)); if (pv.size() == 1) { if (pv[0].first * 2 > n) { OUT(1)BR; return 0; } } int ans = n - 1; for (auto& prime : ev) { if (prime * 2 > n) --ans; } OUT(ans)BR; return 0; }