Submission #701240

#	Time	Username	Problem	Language	Result	Execution time	Memory
701240		tamthegod	Rima (COCI17_rima)	C++17	42 / 140	1058 ms	70160 KiB

rima

// Make the best become better
// No room for laziness
#include<bits/stdc++.h>

#define int long long
#define pb push_back
#define fi first
#define se second
using namespace std;
using ll = long long;
using ld = long double;
using ull = unsigned long long;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const int maxN = 1e6 + 5;
const int mod = 1e9 + 7;
const ll oo = 1e18;
int n;
string s[maxN];
map<int, int> f;
const int base = 234744;
int dp[maxN];
void ReadInput()
{
    cin >> n;
    for(int i=1; i<=n; i++)
    {
        cin >> s[i];
        reverse(s[i].begin(), s[i].end());
        s[i] = ' ' + s[i];
    }
    sort(s + 1, s + n + 1, [](string p, string q)
    {
        return p.size() > q.size();
    });
}
void Solve()
{
    int res = 0;
    for(int i=1; i<=n; i++)
    {
        int val = 0;
        for(int j=1; j<s[i].size(); j++)
            dp[j] = (dp[j - 1] * base + s[i][j]) % mod;
        val = max(f[dp[s[i].size() - 1]], f[dp[s[i].size() - 2]]);
        val++;
        f[dp[s[i].size() - 1]] = val;
        f[dp[s[i].size() - 2]] = val;
        res = max(res, val);
    }
    cout << res;
}
int32_t main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    ReadInput();
    Solve();
}

Compilation message (stderr)

rima.cpp: In function 'void Solve()':
rima.cpp:42:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |         for(int j=1; j<s[i].size(); j++)
      |                      ~^~~~~~~~~~~~

• Subtask 1: 42 / 140