結果
| 問題 |
No.390 最長の数列
|
| コンテスト | |
| ユーザー |
anta
|
| 提出日時 | 2016-07-08 22:54:44 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 62 ms / 5,000 ms |
| コード長 | 3,817 bytes |
| コンパイル時間 | 1,845 ms |
| コンパイル使用メモリ | 172,256 KB |
| 実行使用メモリ | 7,852 KB |
| 最終ジャッジ日時 | 2024-10-02 10:33:06 |
| 合計ジャッジ時間 | 2,808 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 15 |
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; }
class FastInput {
bool _end;
public:
FastInput() : _end(false) {}
operator void*() { return _end ? 0 : (void*)this; }
template<typename T>
void read_unsigned(T *res) {
T x = 0;
for(char c = skip(); '0' <= c && c <= '9'; c = gc())
x = x * 10 + (c - '0');
*res = x;
}
template<typename T>
void read_signed(T *res) {
char c = skip();
bool sign = false;
if(c == '-') sign = true, c = gc();
T x = 0;
for(; '0' <= c && c <= '9'; c = gc())
x = x * 10 + (c - '0');
*res = !sign ? x : -x;
}
void read_c_string(char *str, int *len) {
int n = 0;
for(char c = skip(); !is_delim(c); c = gc())
str[n ++] = c;
str[n] = 0;
*len = n;
}
void read_string(std::string *str) {
str->clear();
for(char c = skip(); !is_delim(c); c = gc())
*str += c;
}
void read_line(std::string *str) {
str->clear();
for(char c = gc(); c != '\n'; c = gc())
*str += c;
if(!str->empty() && (*str)[str->size() - 1] == '\r') str->resize(str->size() - 1);
}
void read_double(double *res) {
std::string buf;
read_string(&buf);
sscanf(buf.c_str(), "%lf", res);
}
void read_char(char *res) {
*res = skip();
}
void read_string_buf(char *res, int n) {
*res = skip();
}
FastInput &operator()(char &res) { read_char(&res); return *this; }
FastInput &operator()(int &res) { read_signed(&res); return *this; }
FastInput &operator()(unsigned &res) { read_unsigned(&res); return *this; }
FastInput &operator()(long long &res) { read_signed(&res); return *this; }
FastInput &operator()(unsigned long long &res) { read_unsigned(&res); return *this; }
FastInput &operator()(char *res) { int len; read_c_string(res, &len); return *this; }
FastInput &operator()(std::string &res) { read_string(&res); return *this; }
FastInput &operator()(double &res) { read_double(&res); return *this; }
template<typename T1, typename T2>
FastInput &operator()(T1 &res1, T2 &res2) {
return operator()(res1)(res2);
}
template<typename T1, typename T2, typename T3>
FastInput &operator()(T1 &res1, T2 &res2, T3 &res3) {
return operator()(res1)(res2)(res3);
}
template<typename T>
FastInput &a(T *a, int n) {
for(int i = 0; i < n; ++ i)
operator()(a[i]);
return *this;
}
template<typename T>
FastInput &operator()(vector<T> &v) {
for(size_t i = 0; i < v.size(); ++ i)
operator()(v[i]);
return *this;
}
private:
static char gc() {
#if defined(__GNUC__) && !defined(__MINGW32__)
return (char)getchar_unlocked();
#elif defined(_MSC_VER)
return (char)_getchar_nolock();
#else
return (char)getchar();
#endif
}
static bool is_delim(char c) {
return c == ' ' || c == '\t' || c == '\n' || c == '\r' || c == EOF;
}
char skip() {
if(_end) return EOF;
char c;
for(c = gc(); c != -1 && is_delim(c); c = gc());
if(c == EOF) _end = true;
return c;
}
} in;
int main() {
int N;
while(in(N)) {
vector<int> xs(N);
in(xs);
int X = *max_element(xs.begin(), xs.end());
vector<bool> ok(X + 1);
for(int x : xs)
ok[x] = true;
vector<int> dp(X + 1, 1);
rer(i, 1, X) if(ok[i]) {
int x = dp[i];
for(int j = i * 2; j <= X; j += i) if(ok[j])
amax(dp[j], x + 1);
}
int ans = *max_element(dp.begin(), dp.end());
printf("%d\n", ans);
}
return 0;
}
anta