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Submission #165722

# Submission time Handle Problem Language Result Execution time Memory
165722 2019-11-28T11:44:18 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++) {
		unordered_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 2 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 22 ms 1144 KB Output is correct
6 Correct 10 ms 1144 KB Output is correct
7 Correct 56 ms 1272 KB Output is correct
8 Correct 8 ms 1144 KB Output is correct
9 Execution timed out 1085 ms 2040 KB Time limit exceeded
10 Correct 40 ms 2040 KB Output is correct
11 Execution timed out 1081 ms 2680 KB Time limit exceeded
12 Incorrect 78 ms 2680 KB Output isn't correct
13 Correct 143 ms 3148 KB Output is correct
14 Execution timed out 1075 ms 3448 KB Time limit exceeded
15 Incorrect 87 ms 3192 KB Output isn't correct
16 Correct 116 ms 2064 KB Output is correct
17 Correct 45 ms 2040 KB Output is correct
18 Execution timed out 1075 ms 3048 KB Time limit exceeded
19 Correct 144 ms 3064 KB Output is correct
20 Execution timed out 1078 ms 2424 KB Time limit exceeded