Submission #588267

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
588267	2022-07-03 00:32:52	Bench0310	Linear Garden (IOI08_linear_garden)	C++17	100 / 100	33 ms	18056 KiB

linear_garden

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#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    int n,mod;
    cin >> n >> mod;
    auto add=[&](int a,int b)->int{return a+b-(a+b>=mod?mod:0);};
    auto sub=[&](int a,int b)->int{return a-b+(a-b<0?mod:0);};
    string s;
    cin >> s;
    vector<int> a(n+1,0);
    for(int i=1;i<=n;i++) a[i]=(s[i-1]=='P');
    vector<array<int,3>> dp(n+1,{0,0,0});
    dp[0]={1,1,1};
    for(int i=1;i<=n;i++)
    {
        for(int j=0;j<3;j++)
        {
            for(int k=0;k<3;k++)
            {
                if(abs(j-k)==1) dp[i][j]=add(dp[i][j],dp[i-1][k]);
            }
        }
    }
    int res=1;
 
 
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