제출 #584116

#제출 시각아이디문제언어결과실행 시간메모리
584116AtinaRMiners (IOI07_miners)C++14
52 / 100
1591 ms210400 KiB
#include <bits/stdc++.h> using namespace std; const long long MAX=1e5+1; long long n; string s; long long dp[MAX][4][4][4][4]; long long check(long long a, long long b, long long c) { set<long long> st; if(a!=0)st.insert(a); if(b!=0)st.insert(b); if(c!=0)st.insert(c); return st.size(); } long long rek(long long i, long long L1,long long L2, long long R1, long long R2) { if(i==n) { return 0; } long long res=0; if(dp[i][L1][R1][L2][R2]!=-1)return dp[i][L1][L2][R1][R2]; long long tmp; if(s[i]=='M') { tmp=1; } else if(s[i]=='B') { tmp=2; } else { tmp=3; } res=rek(i+1,tmp,L1, R1, R2)+check(tmp,L1,L2); res=max(res,rek(i+1,L1,L2,tmp,R1)+check(tmp,R1,R2)); return dp[i][L1][L2][R1][R2]=res; } int main() { cin>>n; cin>>s; memset(dp,-1,sizeof(dp)); cout<<rek(0,0,0,0,0)<<endl; return 0; }
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