結果
| 問題 |
No.262 面白くないビットすごろく
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2016-02-26 00:10:44 |
| 言語 | C++11(廃止可能性あり) (gcc 13.3.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 4,121 bytes |
| コンパイル時間 | 410 ms |
| コンパイル使用メモリ | 55,856 KB |
| 実行使用メモリ | 6,944 KB |
| 最終ジャッジ日時 | 2024-09-22 13:48:16 |
| 合計ジャッジ時間 | 932 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 3 WA * 1 |
ソースコード
#include<iostream>
/* 以下拾ってきたテンプレート */
//// bit ////
#ifdef _MSC_VER
#ifdef _WIN32
inline unsigned int __builtin_ctz(unsigned int x) { unsigned long r; _BitScanForward(&r, x); return r; }
inline unsigned int __builtin_clz(unsigned int x) { unsigned long r; _BitScanReverse(&r, x); return 31 - r; }
inline unsigned int __builtin_ffs(unsigned int x) { unsigned long r; return _BitScanForward(&r, x) ? r + 1 : 0; }
inline unsigned int __builtin_popcount(unsigned int x) { return __popcnt(x); }
#ifdef _WIN64
inline unsigned long long __builtin_ctzll(unsigned long long x) { unsigned long r; _BitScanForward64(&r, x); return r; }
inline unsigned long long __builtin_clzll(unsigned long long x) { unsigned long r; _BitScanReverse64(&r, x); return 63 - r; }
inline unsigned long long __builtin_ffsll(unsigned long long x) { unsigned long r; return _BitScanForward64(&r, x) ? r + 1 : 0; }
inline unsigned long long __builtin_popcountll(unsigned long long x) { return __popcnt64(x); }
#else
inline unsigned int hidword(unsigned long long x) { return static_cast<unsigned int>(x >> 32); }
inline unsigned int lodword(unsigned long long x) { return static_cast<unsigned int>(x & 0xFFFFFFFF); }
inline unsigned long long __builtin_ctzll(unsigned long long x) { return lodword(x) ? __builtin_ctz(lodword(x)) : __builtin_ctz(hidword(x)) + 32; }
inline unsigned long long __builtin_clzll(unsigned long long x) { return hidword(x) ? __builtin_clz(hidword(x)) : __builtin_clz(lodword(x)) + 32; }
inline unsigned long long __builtin_ffsll(unsigned long long x) { return lodword(x) ? __builtin_ffs(lodword(x)) : hidword(x) ? __builtin_ffs(hidword(x)) + 32 : 0; }
inline unsigned long long __builtin_popcountll(unsigned long long x) { return __builtin_popcount(lodword(x)) + __builtin_popcount(hidword(x)); }
#endif // _WIN64
#endif // _WIN32
#endif // _MSC_VER
/* コピペテンプレートおわり */
inline unsigned long long popcount(unsigned long long x) { return __builtin_popcountll(x); }
#define BITS_LOWER (10)
using namespace std;
typedef unsigned long long ull;
struct Point {
ull need2overflow;
ull next;
};
// problems/402
int main() {
ull n;
cin >> n;
int i=0;
ull tmp = n;
while (true) {
if(tmp>>1 == 0) break;
tmp = tmp >> 1;
i++;
}
ull nbits = i;
ull bits_upper = nbits >= BITS_LOWER ? nbits - BITS_LOWER : 1;
bits_upper++; // 行き過ぎの検知のために多少オーバーすることがあるため、一桁多く取る
//cout << bits_upper << endl;
// if (npc <= BITS_LOWER) {普通に計算;}
// 大きい値を諦めてみる
if (bits_upper > 24) {
cout << -1 << endl;
return 0;
}
Point** P = new Point*[bits_upper];
for (int i = 0; i < bits_upper; i++) {
P[i] = new Point[1 << BITS_LOWER];
}
// 下BITS_LOWERビットについて調べる
for (int i = 0; i < bits_upper; i++) {
for (ull ii = 0; ii < 1 << BITS_LOWER; ii++) {
if (i == 0 && ii == 0) continue;
ull bit = ii;
ull max = 1 << BITS_LOWER;
ull c = 0;
while (true) {
c++;
bit += (i + popcount(bit));
if (bit >= max) {
bit -= max;
break;
}
}
P[i][ii].need2overflow = c;
P[i][ii].next = bit;
//cout << "[" << i << "][" << ii << "]: " << P[i][ii].need2overflow << ", " << P[i][ii].next << endl;
}
}
ull result = -1;
ull upper = 0;
ull lower = 1;
ull count = 1;
ull current_upper = upper;
ull current_lower = lower;
ull current_count = count;
ull upc = popcount(upper);
while (true) {
current_upper = upper;
current_lower = lower;
current_count = count;
upc = popcount(upper);
count += P[upc][lower].need2overflow;
lower = P[upc][lower].next;
upper++;
ull pos = (upper << BITS_LOWER) + lower;
if (pos >= n) { // 行き過ぎ
// 一つ戻す
count = current_count;
upper = current_upper;
lower = current_lower;
pos = (upper << BITS_LOWER) + lower;
// 普通に計算する
while (true) {
if (pos == n) {
result = count;
break;
}
else if (pos > n) break;
pos += popcount(pos);
count++;
}
break;
}
}
cout << result << endl;
return 0;
}