Submission #581349

#	Time	Username	Problem	Language	Result	Execution time	Memory
581349		Omar_Elgedawy	Miners (IOI07_miners)	C++14	60 / 100	940 ms	524288 KiB

miners

#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;
map<pair<int,pair<deque<char>,deque<char>>>,int>dp;
map<pair<int,pair<deque<char>,deque<char>>>,bool>vis;
int rec(int idx,deque<char>msk1,deque<char>msk2){
  if(idx==n)return 0;
  if(vis[make_pair(idx,make_pair(msk1,msk2))]){
    return dp[make_pair(idx,make_pair(msk1,msk2))];
  }
  vis[make_pair(idx,make_pair(msk1,msk2))]=1;
  deque<char>before=msk1,before2=msk2;
  if(msk1.size()==3)
    msk1.pop_front();
  msk1.push_back(s[idx]);
  int m=0,b=0,f=0;
  for(int i=0;i<msk1.size();i++){
    m+=msk1[i]=='M';
    b+=msk1[i]=='B';
    f+=msk1[i]=='F';
  }
  int c1=rec(idx+1,msk1,msk2)+(m>0)+(b>0)+(f>0);
  if(msk2.size()==3){
    msk2.pop_front();
  }
  msk2.push_back(s[idx]);
  m=0,b=0,f=0;
  for(int i=0;i<msk2.size();i++){
    m+=msk2[i]=='M';
    b+=msk2[i]=='B';
    f+=msk2[i]=='F';
  }
  int c2=rec(idx+1,before,msk2)+(m>0)+(b>0)+(f>0);
  return dp[make_pair(idx,make_pair(before,before2))]=max(c1,c2);
}
void testcase(int h){
  cin>>n>>s;
  deque<char>q;
  cout<<rec(0,q,q);
}
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, std::deque<char>, std::deque<char>)':
miners.cpp:34:16: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::deque<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |   for(int i=0;i<msk1.size();i++){
      |               ~^~~~~~~~~~~~
miners.cpp:45:16: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::deque<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |   for(int i=0;i<msk2.size();i++){
      |               ~^~~~~~~~~~~~

• Subtask 1: 9 / 9
• Subtask 2: 9 / 9
• Subtask 3: 9 / 9
• Subtask 4: 9 / 9
• Subtask 5: 9 / 9
• Subtask 6: 7 / 7
• Subtask 7: 8 / 8
• Subtask 8: 0 / 8
• Subtask 9: 0 / 8
• Subtask 10: 0 / 8
• Subtask 11: 0 / 8
• Subtask 12: 0 / 8