Submission #1019369

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1019369	2024-07-10 18:24:17	ttamx	Linear Garden (IOI08_linear_garden)	C++17	80 / 100	106 ms	65536 KiB

linear_garden

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#include<bits/stdc++.h>
using namespace std;
const int N=1e6+5;
int n,m;
int dp[N][3][3][5];
string s;
int& norm(int &x){
    return x%=m;
}
int main(){
    cin >> n >> m;
    cin >> s;
    dp[0][0][0][2]=1;
    for(int i=1;i<=n;i++){
        for(int j=0;j<3;j++){
            for(int k=0;k<3;k++){
                for(int x=-2;x<=2;x++){
                    if(x<2)norm(dp[i][j][max(k,x+1)][x+3]+=dp[i-1][j][k][x+2]);
                    if(x>-2)norm(dp[i][max(j,-x+1)][k][x+1]+=dp[i-1][j][k][x+2]);
                }
            }
        }
    }
    int mn=0,mx=0,cur=0,ans=1;
    for(int i=0;i<n;i++){
 
 
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