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Submission #165721

# Submission time Handle Problem Language Result Execution time Memory
165721 2019-11-28T11:42:13 Z Sensei Lozinke (COCI17_lozinke) C++17
65 / 100
 1000 ms 3448 KB 
#include <bits/stdc++.h>

using namespace std;

const long long P = 53;
const long long MOD = 1e9 + 7;

const int MAXN = 2e4;

long long add (long long x, long long y) {
	return ((x % MOD) + (y % MOD)) % MOD;
}

long long mul (long long x, long long y) {
	return ((x % MOD) * (y % MOD)) % MOD;
}

map<long long, set<int> > m;
string st[MAXN + 7];

int main () {
	int N;
	cin >> N;

	for (int i = 1; i <= N; i++) {
		cin >> st[i];
	}

	for (int i = 1; i <= N; i++) {
		long long hash = 0;

		for (int j = 0; j < st[i].size(); j++) {
			hash = mul(hash, P);
			hash = add(hash, st[i][j] - 'a' + 1);
		}

		m[hash].insert(i);
	}

	long long ans = 0;

	for (int i = 1; i <= N; i++) {
		set<int> s;

		for (int ss = 0; ss < st[i].size(); ss++) {
			long long hash = 0;

			for (int j = ss; j < st[i].size(); j++) {
				if (ss == 0 && j + 1 == st[i].size()) {
					break;
				}

				hash = mul(hash, P);
				hash = add(hash, st[i][j] - 'a' + 1);

				if (m.find(hash) != m.end()) {
					for (int id : m[hash]) {
						if (id != i) {
							s.insert(id);
						}
					}
				}
			}
		}

		ans += s.size();
	}

	long long ans2 = 0;

	for (int i = 1; i <= N; i++) {
		long long hash = 0;

		for (int j = 0; j < st[i].size(); j++) {
			hash = mul(hash, P);
			hash = add(hash, st[i][j] - 'a' + 1);
		}

		ans2 += m[hash].size() - 1;
	}

	ans += ans2;

	cout << ans << "\n";

	return 0;
}

Compilation message

lozinke.cpp: In function 'int main()':
lozinke.cpp:32:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int j = 0; j < st[i].size(); j++) {
                   ~~^~~~~~~~~~~~~~
lozinke.cpp:45:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int ss = 0; ss < st[i].size(); ss++) {
                    ~~~^~~~~~~~~~~~~~
lozinke.cpp:48:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for (int j = ss; j < st[i].size(); j++) {
                     ~~^~~~~~~~~~~~~~
lozinke.cpp:49:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if (ss == 0 && j + 1 == st[i].size()) {
                    ~~~~~~^~~~~~~~~~~~~~~
lozinke.cpp:74:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int j = 0; j < st[i].size(); j++) {
                   ~~^~~~~~~~~~~~~~

Subtask #1
65.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1016 KB Output is correct
2 Correct 3 ms 888 KB Output is correct
3 Correct 3 ms 888 KB Output is correct
4 Correct 5 ms 1016 KB Output is correct
5 Correct 24 ms 1144 KB Output is correct
6 Correct 9 ms 1144 KB Output is correct
7 Correct 54 ms 1272 KB Output is correct
8 Correct 8 ms 1144 KB Output is correct
9 Execution timed out 1084 ms 2168 KB Time limit exceeded
10 Correct 39 ms 2012 KB Output is correct
11 Execution timed out 1086 ms 2680 KB Time limit exceeded
12 Incorrect 76 ms 2552 KB Output isn't correct
13 Correct 138 ms 3064 KB Output is correct
14 Execution timed out 1071 ms 3448 KB Time limit exceeded
15 Incorrect 91 ms 3192 KB Output isn't correct
16 Correct 108 ms 2044 KB Output is correct
17 Correct 46 ms 1912 KB Output is correct
18 Execution timed out 1077 ms 2552 KB Time limit exceeded
19 Correct 135 ms 3064 KB Output is correct
20 Execution timed out 1065 ms 2296 KB Time limit exceeded