Submission #581572

#TimeUsernameProblemLanguageResultExecution timeMemory
581572Omar_ElgedawyMiners (IOI07_miners)C++14
32 / 100
1129 ms499144 KiB
#include <bits/stdc++.h> using namespace std; #define cin(vec) for(auto& i : vec) cin >> i #define cout(vec) for(auto& i : vec) cout << i << " "; cout << "\n"; #define fast ios::sync_with_stdio(0);cin.tie(0); #define loop(i,a,b) for (int i = a; i < b; i++) #define F first #define S second #define pb(n) push_back(n) #define pf(n) push_front(n) #define dci(d) fixed<<setprecision(d) #define sp ' ' #define el '\n' #define all(v) v.begin(),v.end() #define int long long int dx[8]= {0,0,1,-1,-1,1,1,-1}; int dy[8]= {-1,1,0,0,-1,1,-1,1}; int const N=1e5+1,M=1e3+1,Mod=1e9+7; string s; int n; int dp[N][5][5][5][5]; int value(int a,int b,int c){ set<int>s; s.insert(a); s.insert(b); s.insert(c); s.erase(0ll); return s.size(); } int trans(char x){ if(x=='M')return 1; if(x=='B')return 2; return 3; } int rec(int idx, int left_a, int left_b, int right_a, int right_b){ if(idx==n)return 0; int _idx=idx,lefta=left_a,leftb=left_b,righta=right_a,rightb=right_b; int &ret=dp[idx][left_a][left_b][right_a][right_b]; if(~ret)return ret; int c=trans(s[idx]); int c1=rec(idx+1,left_b,c,right_a,right_b)+value(left_a,left_b,c); int c2=rec(idx+1,left_a,left_b,right_b,c)+value(right_a,right_b,c); return dp[idx][lefta][leftb][righta][rightb]=max(c1,c2); } void testcase(int h){ cin>>n>>s; memset(dp,-1,sizeof dp); cout<<max(rec(1,trans(s[0]),0,0,0)+1,rec(1,0,0,trans(s[0]),0)+1); } int32_t main() { fast testcase(1); // int tc;cin>>tc;for(int i=1;i<=tc;i++)testcase(i); return 0; }

Compilation message (stderr)

miners.cpp: In function 'long long int rec(long long int, long long int, long long int, long long int, long long int)':
miners.cpp:38:7: warning: unused variable '_idx' [-Wunused-variable]
   38 |   int _idx=idx,lefta=left_a,leftb=left_b,righta=right_a,rightb=right_b;
      |       ^~~~
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