Submission #444217

#	Time	Username	Problem	Language	Result	Execution time	Memory
444217		BeanZ	Lozinke (COCI17_lozinke)	C++14	100 / 100	386 ms	15972 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 = 2038074751;
long long mod2 = 1e9 + 7;
const int lim = 4e5 + 5;
const int lg = 20;
const int base = 37;
const int base2 = 311;
const long double eps = 1e-6;
string s[N];
ll h[N], p[N], h2[N], p2[N];
map<pair<ll, ll>, ll> mem;
ll get(ll l, ll r){
    return (h[r] - h[l - 1] * p[r - l + 1] + mod * mod) % mod;
}
ll get2(ll l, ll r){
    return (h2[r] - h2[l - 1] * p2[r - l + 1] + mod2 * mod2) % mod2;
}
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;
    p2[0] = 1;
    ll ans = 0;
    for (int i = 1; i <= 10; i++) p[i] = p[i - 1] * base % mod;
    for (int i = 1; i <= 10; i++) p2[i] = p2[i - 1] * base2 % mod2;
    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;
            h2[j] = (h2[j - 1] * base2 + (s[i][j - 1] - 'a' + 1)) % mod2;
        }
        map<pair<ll, 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), get2(j, k)}]) ans = ans + mem[{get(j, k), get2(j, k)}];
                eat[{get(j, k), get2(j, k)}] = 1;
            }
        }
        mem[{h[x], h2[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:30:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |         freopen("test.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
lozinke.cpp:31:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |         freopen("test.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 100 / 100