結果
| 問題 |
No.822 Bitwise AND
|
| コンテスト | |
| ユーザー |
nomi
|
| 提出日時 | 2019-04-26 23:20:51 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 247 ms / 2,000 ms |
| コード長 | 3,648 bytes |
| コンパイル時間 | 1,804 ms |
| コンパイル使用メモリ | 174,416 KB |
| 実行使用メモリ | 31,888 KB |
| 最終ジャッジ日時 | 2024-06-25 18:16:03 |
| 合計ジャッジ時間 | 3,247 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| other | AC * 17 |
ソースコード
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define vvi vector<vector<int>>
#define vec vector
#define pq priority_queue
#define all(v) (v).begin(), (v).end()
#define uniqueV(x) sort(x.begin(), x.end()); x.erase(unique(x.begin(), x.end()), x.end());
#define rep(i, n) for (int (i) = (0); (i) < (n); ++(i))
#define repp(i, m, n) for (int (i) = (m); (i) < (n); ++(i))
#define dbg(x) cerr << #x << ": " << x << endl;
#define dbg2(x, y) cerr<<"("<<#x<<", "<<#y<<") = "<<"("<<x<<", "<<y<<")"<<endl;
#define dbg3(x, y, z) cerr<<"("<<#x<<", "<<#y<<", "<<#z<<") = "<<"("<<x<<", "<<y<<", "<<z<<")"<<endl;
#define dbgB(value, size) cerr<<#value<<": "<<bitset<size>(value) << endl;
#define line() cerr << "---------------" << endl;
const int dx[] = {1, -1, 0, 0};
const int dy[] = {0, 0, -1, 1};
const double PI = 3.14159265358979323846;
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<typename T>
void print1(T begin, T end) {
while (begin != end) {
cout << (*begin) << " ";
*begin++;
}
cout << endl;
}
template<typename T>
void print2(T Array, int height, int width) {
for (int i = 0; i < height; i++) {
for (int j = 0; j < width; j++) {
cout << " " << Array[i][j];
}
cout << endl;
}
}
void print() { std::cerr << endl; }
template <class Head, class... Tail>
void print(Head&& head, Tail&&... tail) {
std::cerr << head << " ";
print(std::forward<Tail>(tail)...);
}
template<class T>
void Add(T &a, const T &b, const T &mod=1000000007) {
int val = ((a % mod) + (b % mod)) % mod;
if (val < 0) { val += mod; }
a = val;
}
template <typename X, typename T> auto vectors(X x, T a) { return vector<T>(x, a); }
template <typename X, typename Y, typename Z, typename... Zs> auto vectors(X x, Y y, Z z, Zs... zs) { auto cont = vectors(y, z, zs...); return vector<decltype(cont)>(x, cont); }
// ------------------------------------------------------------------------------------------
int n, k;
int ans = 0;
bool check(int x, int y) {
return (x <= y) and (y - x <= k) and ((x & y) == n);
}
/*
void dfs(int turn, int x, int y) {
if (y - x > k) return;
if ((1ll << turn) > (1ll << n)) {
if (check(x, y)) {
// dbg2(x, y)
ans++;
}
return;
}
if ((1ll << turn) & n) {
if (y - x <= k) dfs(turn+1, x | (1ll << turn), y | (1ll << turn));
} else {
if (y - x <= k) dfs(turn+1, x, y);
if (y - x <= k) dfs(turn+1, x | (1ll << turn), y);
if (y - x <= k) dfs(turn+1, x, y | (1ll << turn));
}
}
*/
set<int> cand;
void dfs(int turn, int val) {
if (turn > 18) {
if ((val & n) == n) cand.insert(val);
return;
}
dfs(turn+1, val);
dfs(turn+1, val | (1ll << turn));
}
signed main() {
cin >> n >> k;
if (n < k) {
puts("INF");
return 0;
}
dfs(0, 0);
int lim = 0;
while (1) {
if ((1ll << lim) > n) {
break;
}
lim++;
}
vector<int> v(cand.size());
int cnt = 0;
for (int val : cand) {
v[cnt++] = val;
// if (val < (1<<lim) - 1) {
// dbg(val)
// }
}
int ans2 = 0;
int v1 = -2, v2 = -1;
rep (i, v.size()) {
repp (j, i, v.size()) {
if (v[j] - v[i] > k) break;
if (check(v[i], v[j])) {
ans2++;
if (v1 == -2) {
v1 = -1;
continue;
}
if (v1 == -1) {
v1 = v[j] - v[i];
continue;
}
if (v1 >= 0 and v2 == -1) {
v2 = v[j] - v[i];
continue;
}
}
}
}
cout << ans2 << endl;
return 0;
}
nomi