結果
| 問題 |
No.979 Longest Divisor Sequence
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2021-11-14 21:44:57 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 1,724 bytes |
| コンパイル時間 | 2,120 ms |
| コンパイル使用メモリ | 196,264 KB |
| 最終ジャッジ日時 | 2025-01-25 18:06:57 |
|
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 3 WA * 13 |
ソースコード
// code of JUYU ^ ^ never doubt youself !
#include <bits/stdc++.h>
typedef long long ll;
#define int ll
#define For(i,a,b) for (int i = a; i <= b; i ++)
#define Dow(i,a,b) for (int i = b; i >= a; -- i)
#define ms(a,b) memset(a, b, sizeof (a))
#define fir first
#define sec second
#define mk make_pair
#define pb push_back
#define eb emplace_back
using namespace std;
typedef pair<int,int> PII;
const int mod = 998244353;
const int MOD = 1000000007;
const int maxn = 3e5 + 5;
inline ll read()
{
ll t = 0, dp = 1; char c = getchar();
while(!isdigit(c)) {if (c == '-') dp = -1; c = getchar();}
while(isdigit(c)) t = t * 10 + c - 48, c = getchar();
return t * dp;
}
inline void write(ll x){if (x < 0){putchar('-'); x = -x;} if(x >= 10) write(x / 10); putchar(x % 10 + 48);}
inline void writeln(ll x){write(x); puts("");}
inline void write_p(ll x){write(x); putchar(' ');}
inline void write_b(ll x){putchar(' '); write(x);}
inline int qpow(int x, int y, int z){int ret = 1; for (; y; y /= 2, x = x * x % z) if (y & 1) ret = ret * x % z; return ret;}
inline int PrimeInv(int x, int y, int z){return qpow(x, y - 2, z);}
int a[maxn], dp[maxn], n;
vector<int> divide[maxn];
inline void init()
{
For(i,1,maxn) for (int j = 1; i * j <= n; j ++) divide[i * j].pb(i);
}
signed main()
{
init();
n = read();
For(i,0,n-1) a[i] = read();
For(i,0,n-1)
{
int MAX = 0;
for (int x : divide[i]) if (x < i) MAX = max(MAX, dp[x]);
dp[i] = ++ MAX;
}
writeln(*max_element(dp, dp + n + 1));
return 0;
}
/* stuff you should look for
* int overflow, array bounds
* special cases (n=1?)
* do smth instead of nothing and stay organized
* WRITE STUFF DOWN
* DON'T GET STUCK ON ONE APPROACH
-- Benq
*/