Submission #444203

#	Time	Username	Problem	Language	Result	Execution time	Memory
444203		BeanZ	Lozinke (COCI17_lozinke)	C++14	85 / 100	320 ms	15892 KiB

lozinke

// I_Love_LPL 1y0m3d
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define endl '\n'
const int N = 1e5 + 5;
long long mod = 1e9 + 7;
const int lim = 4e5 + 5;
const int lg = 20;
const int base = 311;
const long double eps = 1e-6;
string s[N];
ll h[N], p[N];
map<ll, ll> mem;
ll get(ll l, ll r){
    return (h[r] - h[l - 1] * p[r - l + 1] + mod * mod) % mod;
}
bool cmp(string x, string y){
    return x.length() < y.length();
}
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    if (fopen("tests.inp", "r")){
        freopen("test.inp", "r", stdin);
        freopen("test.out", "w", stdout);
    }
    ll n;
    cin >> n;
    for (int i = 1; i <= n; i++){
        cin >> s[i];
    }
    sort(s + 1, s + n + 1, cmp);
    p[0] = 1;
    ll ans = 0;
    for (int i = 1; i <= 10; i++) p[i] = p[i - 1] * base % mod;
    for (int i = 1; i <= n; i++){
        ll x = s[i].length();
        for (int j = 1; j <= x; j++){
            h[j] = (h[j - 1] * base + (s[i][j - 1] - 'a' + 1)) % mod;
        }
        map<ll, ll> eat;
        for (int j = 1; j <= x; j++){
            for (int k = j; k <= x; k++){
                if (j == 1 && k == x) continue;
                if (!eat[get(j, k)]) ans = ans + mem[get(j, k)];
                eat[get(j, k)] = 1;
            }
        }
        mem[h[x]]++;
    }
    for (auto j : mem){
        ans = ans + j.second * (j.second - 1);
    }
    cout << ans;
}
/*
Ans:

Out:
*/

Compilation message (stderr)

lozinke.cpp: In function 'int main()':
lozinke.cpp:25:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   25 |         freopen("test.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
lozinke.cpp:26:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   26 |         freopen("test.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 85 / 100