Submission #251721

#	Time	Username	Problem	Language	Result	Execution time	Memory
251721		kartel	Rima (COCI17_rima)	C++14	14 / 140	1079 ms	130424 KiB

rima

#include <bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
#define in(x) freopen(x, "r", stdin)
#define out(x) freopen(x, "w", stdout)
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
//#pragma GCC optimize("Ofast,nso-stack-protector,unroll-loops,fast-math,-O3")
#define F first
#define S second
#define pb push_back
#define N +500500
#define M ll(1e9 + 7)
#define sz(x) (int)x.size()
#define re return
#define oo ll(1e9)
#define el '\n'
#define Max_A int(1e9)
//#define el endl
#define pii pair <int, int>
#define err ld(1e-9)
#define Max_S int(3e6)
#define last(x) x.back()
#define all(x) (x).begin(), (x).end()
#define arr_all(x, n) (x + 1), (x + 1 + n)
using namespace std;
//using namespace __gnu_pbds;
//typedef tree <int, null_type, less_equal <int> , rb_tree_tag, tree_order_statistics_node_update> ordered_set;
typedef long long ll;
typedef long double ld;

int f[N], i, n;
string s;
ll st[Max_S + 50], hsh[N][2];
int mrk[N];
map <int, set <int> > g;

int mult(ll a, ll b) {return (a * b) % M;}
int sum(ll a, ll b) {return (a + b + M) % M;}

void dfs(int v, int pr)
{
    if (mrk[v]) return;

    mrk[v] = 1;

    for (auto u : g[hsh[v][1]])
    {
        if (mrk[u] == 1) continue;

        dfs(u, v);
        f[v] = max(f[u] + 1, f[v]);
    }

    for (auto u : g[hsh[v][0]])
    {
        if (mrk[u] == 1) continue;

        dfs(u, v);
        f[v] = max(f[u] + 1, f[v]);
    }
    mrk[v] = 2;
}

int main()
{
    cout.precision(2);
    srand(time(0));
    ios_base::sync_with_stdio(0);
    iostream::sync_with_stdio(0);
    ios::sync_with_stdio(0);
    cin.tie(NULL);
    cout.tie(NULL);

//    in("input.txt");
//    out("output.txt");

    cin >> n;

    st[0] = 1;

    for (i = 1; i <= Max_S; i++) st[i] = mult(st[i - 1], 29);

    for (i = 1; i <= n; i++)
    {
        cin >> s;
        f[i] = 1;

        hsh[i][0] = hsh[i][1] = 0;

        for (int j = 1; j < sz(s); j++)
            hsh[i][1] = sum(hsh[i][1], mult(s[j] - 'a' + 1, st[j - 1]));

        hsh[i][0] = sum(s[0] - 'a' + 1, mult(hsh[i][1], 29));

        g[hsh[i][0]].insert(i);
        g[hsh[i][1]].insert(i);
    }

//    cerr << sz(g[0]) << el;

    for (i = 1; i <= n; i++)
    {
        if (mrk[i]) continue;

        dfs(i, -1);
    }

    int ans = 1;

    for (i = 1; i <= n; i++) ans = max(ans, f[i]);

    cout << ans;
}
//
//00000
//00110
//00111
//00011
//00000

• Subtask 1: 14 / 140