Submission #782518

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
782518	2023-07-14 04:07:09	phoebe	Linear Garden (IOI08_linear_garden)	C++17	85 / 100	59 ms	65536 KiB

linear_garden

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#include <bits/stdc++.h>
using namespace std;
// #define int long long
#define ll long long
#define pii pair<int, int>
#define F first
#define S second
#define PB push_back
#define ALL(x) x.begin(), x.end()
#define FOR(i, n) for (int i = 0; i < n; i++)
#define NYOOM ios::sync_with_stdio(0); cin.tie(0);
#define endl '\n'
const int INF = 1e9 + 7;
const ll LLINF = 1ll<<60;
const int maxn = 1e6 + 10;
int n, m, dp[3][3][maxn];
string s; 
int cnt(int mn, int mx, int rem){ // mn = min(l - p), mx = max(l - p)
    if (mn <= -3 || mx >= 3) return 0;
    if (rem <= 0) return 1;
    if (dp[-mn][mx][rem] != -1) return dp[-mn][mx][rem];
    int go_l = cnt(min(mn + 1, 0), mx + 1, rem - 1);
    int go_p = cnt(mn - 1, max(0, mx - 1), rem - 1);
    dp[-mn][mx][rem] = (go_l + go_p) % m;
    return dp[-mn][mx][rem];
}
 
 
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