Submission #899515

#	Time	Username	Problem	Language	Result	Execution time	Memory
899515		Nonoze	Miners (IOI07_miners)	C++17	92 / 100	833 ms	524288 KiB

miners

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

#define int long long
#define sz(x) (int)(x.size())

using namespace std;
using namespace __gnu_pbds;

typedef
tree<
  int,
  null_type,
  less<int>,
  rb_tree_tag,
  tree_order_statistics_node_update>
ordered_set;

int n, k, m;
string seq;
vector<vector<vector<vector<vector<int>>>>> memo;

int dp(int empl, pair<int, int> prec1, pair<int, int> prec2) {
	if (empl>=n) return 0;
	if (memo[empl][prec1.first][prec1.second][prec2.first][prec2.second]!=-1) {
		return memo[empl][prec1.first][prec1.second][prec2.first][prec2.second];
	}
	int vaut=1;
	if (seq[empl]=='F') vaut=2;
	if (seq[empl]=='B') vaut=3;
	int s1=dp(empl+1, {prec1.second, vaut}, prec2);
	int s2=dp(empl+1, prec1, {prec2.second, vaut});

	set<int> f1, f2;
	f1.insert(vaut), f2.insert(vaut);
	f1.insert(prec1.first), f1.insert(prec1.second);
	f2.insert(prec2.first), f2.insert(prec2.second);
	s1+=f1.size()-f1.count(0);
	s2+=f2.size()-f2.count(0);
	return memo[empl][prec1.first][prec1.second][prec2.first][prec2.second]=max(s1, s2);
}

void solve() {
	cin >> n;
	cin >> seq;
	memo.clear();
	memo.resize(n, vector<vector<vector<vector<int>>>>(4,
	vector<vector<vector<int>>> (4, vector<vector<int>> (4, vector<int>(4, -1)))));
	cout << dp(0, {0, 0}, {0, 0}) << endl;
	return;
}


signed main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	int tt=1;// cin >> tt;
	while(tt--) solve();
	return 0;
}

• 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: 8 / 8
• Subtask 9: 8 / 8
• Subtask 10: 8 / 8
• Subtask 11: 8 / 8
• Subtask 12: 0 / 8