Submission #234391

#	Time	Username	Problem	Language	Result	Execution time	Memory
234391		kartel	Lozinke (COCI17_lozinke)	C++14	85 / 100	453 ms	16248 KiB

lozinke

#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 optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("-O3")
#define F first
#define S second
#define pb push_back
#define N +100500
#define M ll(1e9 + 7)
#define sz(x) (int)x.size()
#define re return
#define oo ll(1e18)
#define el '\n'
#define pii pair <int, int>
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;

string s[N];
ll i, n, ans, j, hsh, p[N], l, r;
map <ll, ll> mp;
map <string, ll> mk;

ll mult(ll x, ll y) {return (x * y) % M;}
ll sm(ll x, ll y) {return (x + y) % M;}

int main()
{
    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;

    p[0] = 1;
    for (i = 1; i <= n; i++) p[i] = mult(p[i - 1], 29);

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

        hsh = 0;

        for (j = 0; j < sz(s[i]); j++)
                hsh = sm(hsh, mult(s[i][j] - 'a' + 1, p[j]));

        mp[hsh]++;
    }

    for (i = 1; i <= n; i++)
    {
        mk.clear();

//        int cur = 0;

        for (l = 0; l < sz(s[i]); l++)
        {
            hsh = 0;

            string t = "";

            for (r = l; r < sz(s[i]); r++)
            {
                t += s[i][r];

                hsh = sm(hsh, mult(s[i][r] - 'a' + 1, p[r - l]));
                if (mk[t]) continue;

                mk[t] = 1;

//                cur += mp[hsh];
                ans += mp[hsh];
            }
        }

//        cout << cur - 1 << el;

    }

    cout << ans - n;
}

• Subtask 1: 85 / 100