Submission #1011937

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1011937	2024-07-01T11:19:00 Z	0npata	Lozinke (COCI17_lozinke)	C++17	100 / 100	185 ms	13316 KB

lozinke

#include<bits/stdc++.h>
using namespace std;

#define int long long
#define vec vector

const int MX = 1e9+7;

mt19937 rng(54);

int rng_next(int mx) {
	return uniform_int_distribution<int32_t>(0, mx)(rng);
}

int32_t main() {
	ios_base::sync_with_stdio(false);
	cin.tie(0);

	int n;
	cin >> n;
	vec<string> a(n);

	for(int i = 0; i<n; i++) cin >> a[i];

	vec<int> pos_hash(10);
	vec<int> let_hash(26);

	for(int i = 0; i<10; i++) {
		pos_hash[i] = rng_next(MX);
	}
	for(int i = 0; i<26; i++) {
		let_hash[i] = rng_next(MX);
	}

	map<int, int> cnt;

	for(int i = 0; i<a.size(); i++) {
		set<int> subs;
		for(int j = 0; j < a[i].size(); j++) {
			int hash = 0;
			for(int k = j; k<a[i].size(); k++) {
				int pos = k-j;
				hash += pos_hash[pos] * let_hash[a[i][k]-'a'];
				subs.insert(hash);
			}
		}

		for(int subh : subs) {
			cnt[subh] += 1;
		}
	}

	int ans = 0;
	for(int i = 0; i<n; i++) {
		int hash = 0;
		for(int j = 0; j<a[i].size(); j++) {
			hash += pos_hash[j] * let_hash[a[i][j]-'a'];
		}
		ans += cnt[hash]-1;
	}

	cout << ans << '\n';

}

Compilation message

lozinke.cpp: In function 'int32_t main()':
lozinke.cpp:37:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |  for(int i = 0; i<a.size(); i++) {
      |                 ~^~~~~~~~~
lozinke.cpp:39:20: 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]
   39 |   for(int j = 0; j < a[i].size(); j++) {
      |                  ~~^~~~~~~~~~~~~
lozinke.cpp:41:20: 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]
   41 |    for(int k = j; k<a[i].size(); k++) {
      |                   ~^~~~~~~~~~~~
lozinke.cpp:56:19: 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]
   56 |   for(int j = 0; j<a[i].size(); j++) {
      |                  ~^~~~~~~~~~~~

Subtask #1

100.0 / 100.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	1 ms	348 KB	Output is correct
5	Correct	3 ms	756 KB	Output is correct
6	Correct	4 ms	604 KB	Output is correct
7	Correct	7 ms	1372 KB	Output is correct
8	Correct	13 ms	1884 KB	Output is correct
9	Correct	26 ms	2140 KB	Output is correct
10	Correct	81 ms	6184 KB	Output is correct
11	Correct	44 ms	3636 KB	Output is correct
12	Correct	169 ms	13316 KB	Output is correct
13	Correct	75 ms	2388 KB	Output is correct
14	Correct	122 ms	12112 KB	Output is correct
15	Correct	185 ms	13140 KB	Output is correct
16	Correct	68 ms	1200 KB	Output is correct
17	Correct	12 ms	860 KB	Output is correct
18	Correct	9 ms	860 KB	Output is correct
19	Correct	106 ms	6912 KB	Output is correct
20	Correct	35 ms	1116 KB	Output is correct