結果
| 問題 |
No.737 PopCount
|
| コンテスト | |
| ユーザー |
はまやんはまやん
|
| 提出日時 | 2018-09-30 10:03:24 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 2 ms / 1,000 ms |
| コード長 | 4,115 bytes |
| コンパイル時間 | 1,908 ms |
| コンパイル使用メモリ | 172,888 KB |
| 実行使用メモリ | 6,820 KB |
| 最終ジャッジ日時 | 2024-10-12 08:58:08 |
| 合計ジャッジ時間 | 2,483 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 15 |
ソースコード
#include<bits/stdc++.h>
#define rep(i,a,b) for(int i=a;i<b;i++)
#define rrep(i,a,b) for(int i=a;i>=b;i--)
#define fore(i,a) for(auto &i:a)
#define all(x) (x).begin(),(x).end()
#pragma GCC optimize ("-O3")
using namespace std; void _main(); int main() { cin.tie(0); ios::sync_with_stdio(false); _main(); }
typedef long long ll; const int inf = INT_MAX / 2; const ll infl = 1LL << 60;
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a = b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a = b; return 1; } return 0; }
//---------------------------------------------------------------------------------------------------
template<int MOD> struct ModInt {
static const int Mod = MOD; unsigned x; ModInt() : x(0) { }
ModInt(signed sig) { x = sig < 0 ? sig % MOD + MOD : sig % MOD; }
ModInt(signed long long sig) { x = sig < 0 ? sig % MOD + MOD : sig % MOD; }
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 {
long long a = x, b = MOD, u = 1, v = 0;
while (b) { long long t = a / b; a -= t * b; std::swap(a, b); u -= t * v; std::swap(u, v); }
return ModInt(u);
}
bool operator==(ModInt that) const { return x == that.x; }
bool operator!=(ModInt that) const { return x != that.x; }
ModInt operator-() const { ModInt t; t.x = x == 0 ? 0 : Mod - x; return t; }
};
template<int MOD> ostream& operator<<(ostream& st, const ModInt<MOD> a) { st << a.get(); return st; };
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;
/*---------------------------------------------------------------------------------------------------
∧_∧
∧_∧ (´<_` ) Welcome to My Coding Space!
( ´_ゝ`) / ⌒i
/ \ | |
/ / ̄ ̄ ̄ ̄/ |
__(__ニつ/ _/ .| .|____
\/____/ (u ⊃
---------------------------------------------------------------------------------------------------*/
ll N;
string B; int NB;
mint comb[61][62][2];
mint sum[61][62][2];
//---------------------------------------------------------------------------------------------------
string to_binary(ll N, int digit = 0) {
string res = "";
while (N) {
if (N & 1) res = "1" + res;
else res = "0" + res;
N >>= 1;
}
if (0 < digit) {
int n = digit - res.length();
rep(i, 0, n) res = "0" + res;
}
return res;
}
//---------------------------------------------------------------------------------------------------
void _main() {
cin >> N;
B = to_binary(N);
NB = B.length();
comb[0][0][0] = 1;
sum[0][0][0] = 0;
rep(dgt, 0, NB) rep(tot, 0, NB + 1) rep(isless, 0, 2) {
int c = B[dgt] - '0';
rep(nxt, 0, 2) {
if (isless == 0 and c < nxt) continue;
int isless2 = isless;
if (nxt < c) isless2 = 1;
comb[dgt + 1][tot + nxt][isless2] += comb[dgt][tot][isless];
sum[dgt + 1][tot + nxt][isless2] += sum[dgt][tot][isless] * 2 + comb[dgt][tot][isless] * nxt;
}
}
mint ans = 0;
rep(tot, 0, NB + 2) rep(isless, 0, 2) ans += sum[NB][tot][isless] * tot;
cout << ans << endl;
}
はまやんはまやん