Submission #1020501

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1020501	2024-07-12 06:03:02	boyliguanhan	Linear Garden (IOI08_linear_garden)	C++17	100 / 100	34 ms	10988 KiB

linear_garden

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#include<bits/stdc++.h>
using namespace std;
vector<pair<int,int>>v;
int main(){
    cin.tie(0)->sync_with_stdio(0);
    int n,m;
    cin>>n>>m;
    string str;
    cin>>str;
    int A=0,B=0;
    for(auto i:str) {
        if(i=='P'){
            v.push_back({A+1,max(1,B)-1});
        } else v.push_back({3,3});
        if(i=='L')
            A++,B=max(1,B)-1;
        else B++,A=max(1,A)-1;
    }
    reverse(v.begin(),v.end());
    int dp[4][4]{},dp2[4][4]{};
    long long ans=1;
    dp[0][0]=1;
    for(auto[a,b]:v){
        for(int i=0;i<3;i++)
            for(int j=0;j<3;j++)
                if(i+a<3&&j+b<3)
                    ans+=dp[i][j];
        for(int i=0;i<3;i++)
            for(int j=0;j<3;j++)
                dp2[i+1][max(j-1,0)]+=dp[i][j],
 
 
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