Submission #100166

#	Time	Username	Problem	Language	Result	Execution time	Memory
100166		pamaj	Rima (COCI17_rima)	C++14	14 / 140	100 ms	36892 KiB

rima

#include <bits/stdc++.h>
using namespace std;

const int maxn = 18;

int dp[1 << maxn], n;
vector<string> s;

bool rhyme(const string& a, const string& b)
{
	int u = a.size() - 1, v = b.size() - 1;

	int cont = 0;
	while(a[u] == b[v] and u >= 0 and v >= 0)
	{
		cont++, u--, v--;
	}

	if(cont >= max(a.size(), b.size()) - 1) return true;
	return false;
}

int solve(int i, int mask)
{

	if(dp[mask] != -1) return dp[mask];

	int ans = 0;


	for(int j = i + 1; j < n; j++)
	{
		if(i == -1)
		{
			ans = max(ans, solve(j, mask | (1 << j)) + 1);
		}
		else if(rhyme(s[i], s[j]))
		{
			ans = max(ans, solve(j, mask | (1 << j)) + 1);
		}
	}

	return dp[mask] = ans;
}

int main()
{
	ios::sync_with_stdio(false), cin.tie(nullptr);

	cin >> n;

	for(int i = 0; i < n; i++)
	{
		string a;
		cin >> a;
		s.push_back(a);
	}

	memset(dp, -1, sizeof(dp));

	cout << solve(-1, 0) << "\n";
}

Compilation message (stderr)

rima.cpp: In function 'bool rhyme(const string&, const string&)':
rima.cpp:19:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if(cont >= max(a.size(), b.size()) - 1) return true;
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 14 / 140