Submission #539535

#	Time	Username	Problem	Language	Result	Execution time	Memory
539535		MurotY	Miners (IOI07_miners)	C++14	36 / 100	1585 ms	7496 KiB

miners

#include <bits/stdc++.h>
#define ll long long
#define ios ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define ff first
#define ss second
using namespace std;
const int N=1e5+7, M=1e9+7;
ll mp[N];	
int n;
string s;
ll ans=0;
void dfs(ll x, string a){
	mp[x]++;
	string b;
	for (int i=0;i<n;i++) if (mp[i] == 0) b=b+s[i];
	
	map <char,ll> mp1;
	ll res=0;
	//cout << a << "\n";
	for (int i=0;i<a.size();i++){
		if (i-1 >= 0) mp1[a[i-1]]=1;
		if (i-2 >= 0) mp1[a[i-2]]=1;
		mp1[a[i]]=1;
		res+=mp1['B']+mp1['F']+mp1['M'];
		mp1.clear();
	}
	mp1.clear();
	for (int i=0;i<b.size();i++){
		if (i-1 >= 0) mp1[b[i-1]]=1;
		if (i-2 >= 0) mp1[b[i-2]]=1;
		mp1[b[i]]=1;
		res+=mp1['B']+mp1['F']+mp1['M'];
		mp1.clear();
	}
	ans=max(ans, res);
	//if (res == 14) cout << a << " " << b <<"\n";
	for (int i=0;i<n;i++){
		if (i > x) dfs(i, a+s[i]);
	}
	mp[x]--;
	return ;
}
int main()
{
	ios;
	cin >> n >> s;
	string q;
	q=q+s[0];
	dfs(0, q);
	cout << ans;
}

Compilation message (stderr)

miners.cpp: In function 'void dfs(long long int, std::string)':
miners.cpp:20:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |  for (int i=0;i<a.size();i++){
      |               ~^~~~~~~~~
miners.cpp:28:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |  for (int i=0;i<b.size();i++){
      |               ~^~~~~~~~~

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