Submission #741773

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
741773	2023-05-14 21:32:39	MODDI	Linear Garden (IOI08_linear_garden)	C++14	100 / 100	95 ms	3324 KiB

linear_garden

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#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define mp make_pair
typedef long long ll;
typedef pair<long long, long long> pll;
typedef pair<int,int> pii;
typedef vector<long long> vl;
typedef vector<int> vi;
int n, mod;
string str;
// 'L' < 'P'
int dp[2][3][3][2];
void add(int &x, int val){
  x += val;
  if(x >= mod)
    x-= mod;
}
int main(){
  cin>>n>>mod>>str;
  dp[0][0][0][1] = 1;
  for(int i = 0; i < n; i++){
    char c = str[i];
    for(int mi = 0; mi <= 2; mi++){
      for(int ma = 0; ma <= 2; ma++){
       if(ma != 2) {
                    if(c == 'L') {
                        add(dp[(i+1)%2][max(0, mi- 1)][ma + 1][1], dp[i%2][mi][ma][1]);
                        add(dp[(i+1)%2][max(0, mi - 1)][ma + 1][0], dp[i%2][mi][ma][0]);
                    } else {
 
 
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