結果
問題 | No.886 Direct |
ユーザー | QCFium |
提出日時 | 2019-08-20 11:14:25 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 1,603 ms / 4,000 ms |
コード長 | 3,231 bytes |
コンパイル時間 | 1,881 ms |
コンパイル使用メモリ | 176,156 KB |
実行使用メモリ | 15,088 KB |
最終ジャッジ日時 | 2024-10-06 11:47:38 |
合計ジャッジ時間 | 13,700 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
5,248 KB |
testcase_01 | AC | 2 ms
5,248 KB |
testcase_02 | AC | 1 ms
5,248 KB |
testcase_03 | AC | 3 ms
5,248 KB |
testcase_04 | AC | 2 ms
5,248 KB |
testcase_05 | AC | 2 ms
5,248 KB |
testcase_06 | AC | 1 ms
5,248 KB |
testcase_07 | AC | 2 ms
5,248 KB |
testcase_08 | AC | 2 ms
5,248 KB |
testcase_09 | AC | 2 ms
5,248 KB |
testcase_10 | AC | 2 ms
5,248 KB |
testcase_11 | AC | 2 ms
5,248 KB |
testcase_12 | AC | 1 ms
5,248 KB |
testcase_13 | AC | 2 ms
5,248 KB |
testcase_14 | AC | 1 ms
5,248 KB |
testcase_15 | AC | 2 ms
5,248 KB |
testcase_16 | AC | 2 ms
5,248 KB |
testcase_17 | AC | 3 ms
5,248 KB |
testcase_18 | AC | 8 ms
5,248 KB |
testcase_19 | AC | 6 ms
5,248 KB |
testcase_20 | AC | 4 ms
5,248 KB |
testcase_21 | AC | 3 ms
5,248 KB |
testcase_22 | AC | 9 ms
5,248 KB |
testcase_23 | AC | 215 ms
8,704 KB |
testcase_24 | AC | 500 ms
9,344 KB |
testcase_25 | AC | 185 ms
7,040 KB |
testcase_26 | AC | 153 ms
8,124 KB |
testcase_27 | AC | 873 ms
14,180 KB |
testcase_28 | AC | 883 ms
13,824 KB |
testcase_29 | AC | 28 ms
14,976 KB |
testcase_30 | AC | 27 ms
14,976 KB |
testcase_31 | AC | 1,603 ms
15,088 KB |
testcase_32 | AC | 1,591 ms
14,976 KB |
testcase_33 | AC | 1,563 ms
14,996 KB |
testcase_34 | AC | 1,566 ms
15,016 KB |
testcase_35 | AC | 1,582 ms
14,916 KB |
ソースコード
#include <bits/stdc++.h> #define MOD 1000000007 int ri() { int n; scanf("%d", &n); return n; } template<int mod> struct ModInt{ int x; ModInt():x(0){} ModInt(long long y):x(y>=0?y%mod:(mod-(-y)%mod)%mod){} ModInt &operator+=(const ModInt &p){ if((x+=p.x)>=mod)x-=mod; return *this; } ModInt &operator-=(const ModInt &p){ if((x+=mod-p.x)>=mod)x-=mod; return *this; } ModInt &operator*=(const ModInt &p){ x=(int)(1LL*x*p.x%mod); return *this; } ModInt &operator/=(const ModInt &p){ *this*=p.inverse(); return *this; } ModInt &operator^=(long long p){ ModInt res = 1; for (; p; p >>= 1) { if (p & 1) res *= *this; *this *= *this; } return *this = res; } ModInt operator-()const{return ModInt(-x);} ModInt operator+(const ModInt &p)const{return ModInt(*this)+=p;} ModInt operator-(const ModInt &p)const{return ModInt(*this)-=p;} ModInt operator*(const ModInt &p)const{return ModInt(*this)*=p;} ModInt operator/(const ModInt &p)const{return ModInt(*this)/=p;} ModInt operator^(long long p)const{return ModInt(*this)^=p;} bool operator==(const ModInt &p)const{return x==p.x;} bool operator!=(const ModInt &p)const{return x!=p.x;} explicit operator int() const { return x; } // added by QCFium ModInt operator=(const int p) {x = p; return ModInt(*this);} // added by QCFium ModInt inverse()const{ int a=x,b=mod,u=1,v=0,t; while(b>0){ t=a/b; a-=t*b; std::swap(a,b); u-=t*v; std::swap(u,v); } return ModInt(u); } friend std::ostream &operator<<(std::ostream &os,const ModInt<mod> &p){ return os<<p.x; } friend std::istream &operator>>(std::istream &is,ModInt<mod> &a){ long long x; is>>x; a=ModInt<mod>(x); return (is); } }; typedef ModInt<MOD> mint; mint solve(int h, int w) { if (h < w) std::swap(h, w); std::vector<int> pf_table(h + 1); for (int i = 2; i <= h; i++) if (!pf_table[i]) for (int j = i; j <= h / i; j++) pf_table[j * i] = i; mint res = mint(h) * (w - 1) + mint(w) * (h - 1); for (int i = 1; i < w; i++) { std::vector<int> facts; for (int cur = i; ; ) { if (!pf_table[cur]) { if (cur > 1) facts.push_back(cur); break; } facts.push_back(pf_table[cur]); cur /= pf_table[cur]; } std::sort(facts.begin(), facts.end()); facts.erase(std::unique(facts.begin(), facts.end()), facts.end()); int n_fact = facts.size(); int prod[1 << n_fact]; for (int j = 0; j < n_fact; j++) prod[1 << j] = facts[j]; prod[0] = 1; for (int j = 1; j < 1 << n_fact; j++) prod[j] = prod[j & j - 1] * prod[j & ~(j - 1)]; mint so_num = 0; mint so_sum = 0; for (int i = 0; i < 1 << n_fact; i++) { int num = (h - 1) / prod[i]; mint sum = mint(num) * (num + 1) / 2 * prod[i]; if (__builtin_popcount(i) & 1) so_num -= num, so_sum -= sum; else so_num += num, so_sum += sum; } res += mint(2) * (w - i) * (so_num * h - so_sum); } return res; } int main() { int h = ri(), w = ri(); std::cout << solve(h, w) << std::endl; return 0; }