結果
問題 | No.377 背景パターン |
ユーザー | anta |
提出日時 | 2016-06-05 01:06:27 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 418 ms / 5,000 ms |
コード長 | 3,783 bytes |
コンパイル時間 | 2,498 ms |
コンパイル使用メモリ | 183,008 KB |
実行使用メモリ | 5,248 KB |
最終ジャッジ日時 | 2024-10-11 00:58:41 |
合計ジャッジ時間 | 3,632 ms |
ジャッジサーバーID (参考情報) |
judge1 / 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 | 3 ms
5,248 KB |
testcase_01 | AC | 3 ms
5,248 KB |
testcase_02 | AC | 2 ms
5,248 KB |
testcase_03 | AC | 2 ms
5,248 KB |
testcase_04 | AC | 2 ms
5,248 KB |
testcase_05 | AC | 2 ms
5,248 KB |
testcase_06 | AC | 2 ms
5,248 KB |
testcase_07 | AC | 3 ms
5,248 KB |
testcase_08 | AC | 3 ms
5,248 KB |
testcase_09 | AC | 2 ms
5,248 KB |
testcase_10 | AC | 3 ms
5,248 KB |
testcase_11 | AC | 3 ms
5,248 KB |
testcase_12 | AC | 2 ms
5,248 KB |
testcase_13 | AC | 5 ms
5,248 KB |
testcase_14 | AC | 5 ms
5,248 KB |
testcase_15 | AC | 3 ms
5,248 KB |
testcase_16 | AC | 406 ms
5,248 KB |
testcase_17 | AC | 418 ms
5,248 KB |
testcase_18 | AC | 2 ms
5,248 KB |
ソースコード
#include "bits/stdc++.h" using namespace std; #define rep(i,n) for(int (i)=0;(i)<(int)(n);++(i)) #define rer(i,l,u) for(int (i)=(int)(l);(i)<=(int)(u);++(i)) #define reu(i,l,u) for(int (i)=(int)(l);(i)<(int)(u);++(i)) static const int INF = 0x3f3f3f3f; static const long long INFL = 0x3f3f3f3f3f3f3f3fLL; typedef vector<int> vi; typedef pair<int, int> pii; typedef vector<pair<int, int> > vpii; typedef long long ll; template<typename T, typename U> static void amin(T &x, U y) { if(y < x) x = y; } template<typename T, typename U> static void amax(T &x, U y) { if(x < y) x = y; } template<int MOD> struct ModInt { static const int Mod = MOD; unsigned x; ModInt() : x(0) {} ModInt(signed sig) { int sigt = sig % MOD; if(sigt < 0) sigt += MOD; x = sigt; } ModInt(signed long long sig) { int sigt = sig % MOD; if(sigt < 0) sigt += MOD; x = sigt; } int get() const { return (int)x; } ModInt &operator+=(ModInt that) { if((x += that.x) >= MOD) x -= MOD; return *this; } ModInt &operator-=(ModInt that) { if((x += MOD - that.x) >= MOD) x -= MOD; return *this; } ModInt &operator*=(ModInt that) { x = (unsigned long long)x * that.x % MOD; return *this; } ModInt &operator/=(ModInt that) { return *this *= that.inverse(); } ModInt operator+(ModInt that) const { return ModInt(*this) += that; } ModInt operator-(ModInt that) const { return ModInt(*this) -= that; } ModInt operator*(ModInt that) const { return ModInt(*this) *= that; } ModInt operator/(ModInt that) const { return ModInt(*this) /= that; } ModInt inverse() const { signed a = x, b = MOD, u = 1, v = 0; while(b) { signed t = a / b; a -= t * b; std::swap(a, b); u -= t * v; std::swap(u, v); } if(u < 0) u += Mod; ModInt res; res.x = (unsigned)u; return res; } }; template<int MOD> ModInt<MOD> operator^(ModInt<MOD> a, unsigned long long k) { ModInt<MOD> r = 1; while(k) { if(k & 1) r *= a; a *= a; k >>= 1; } return r; } typedef ModInt<1000000007> mint; vector<bool> isprime; vector<int> primes; void sieve(int n) { if((int)isprime.size() >= n + 1) return; isprime.assign(n + 1, true); isprime[0] = isprime[1] = false; int sqrtn = (int)(sqrt(n * 1.) + .5); for(int i = 2; i <= sqrtn; i ++) if(isprime[i]) { for(int j = i * i; j <= n; j += i) isprime[j] = false; } primes.clear(); for(int i = 2; i <= n; i ++) if(isprime[i]) primes.push_back(i); } typedef int FactorsInt; typedef vector<pair<FactorsInt, int> > Factors; void primeFactors(FactorsInt x, Factors &out_v) { out_v.clear(); int sqrtx = (int)(sqrt(x*1.) + 10.5); sieve(sqrtx); for(vector<int>::const_iterator p = primes.begin(); p != primes.end(); ++ p) { if(*p > sqrtx) break; if(x % *p == 0) { int t = 1; x /= *p; while(x % *p == 0) { t ++; x /= *p; } out_v.push_back(make_pair(*p, t)); } } if(x != 1) out_v.push_back(make_pair(x, 1)); } template<typename T>T gcd(T x, T y) { if(y == 0)return x; else return gcd(y, x%y); } void getDivisors(int N, vector<pair<int,int>> &res) { Factors fs; primeFactors(N, fs); res.emplace_back(1, 1); for(auto f : fs) { int p = f.first, k = f.second; for(int i = (int)res.size() - 1; i >= 0; -- i) { int d = res[i].first, t = res[i].second; t *= p - 1; for(int j = 1; j <= k; ++ j) { d *= p; res.emplace_back(d, t); t *= p; } } } sort(res.begin(), res.end()); } int main() { sieve(100000); int H; int W; int K; while(~scanf("%d%d%d", &H, &W, &K)) { vector<pair<int,int>> divsH, divsW; getDivisors(H, divsH); getDivisors(W, divsW); mint ans; for(auto d : divsH) for(auto e : divsW) { int a = d.first, b = e.first; mint cnt = mint(K) ^ ((ll)W * H / a / b * gcd(a, b)); ans += cnt * d.second * e.second; } ans /= (ll)H * W; printf("%d\n", ans.get()); } return 0; }