Submission #862187

#	Time	Username	Problem	Language	Result	Execution time	Memory
862187		TAhmed33	Set (COCI21_set)	C++98	0 / 110	0 ms	348 KiB

Main

#include <bits/stdc++.h>
using namespace std;
int op (string a, string b) {
	int ret = 0;
	for (int i = 0; i < (int)a.length(); i++) {
		ret *= 3;
		if (a[i] == b[i]) ret += a[i] - '0';
		else if (a[i] == '1' && b[i] == '2') {
			ret += 3;
		} else if (a[i] == '2' && b[i] == '1') {
			ret += 3;
		} else if (a[i] == '1' && b[i] == '3') {
			ret += 2;
		} else if (a[i] += '3' && b[i] == '1') {
			ret += 2;
		} else {
			ret++;
		}
	}
	return ret;
}
int freq[6563];
int hsh[2188];
string arr[2188];
int hashh (string s) {
	reverse(s.begin(), s.end());
	int cnt = 0;
	while (s.length()) {
		cnt *= 3;
		cnt += (s.back() - '0');
		s.pop_back();
	}
	return cnt;
}
int main () {
	ios::sync_with_stdio(0);
	cin.tie(0);
	int n, m;
	cin >> n >> m;
	for (int i = 0; i < n; i++) {
		cin >> arr[i];
		hsh[i] = hashh(arr[i]);
		freq[hsh[i]]++;
	}
	long long ans = 0;
	for (int i = 0; i < n; i++) {
		for (int j = 0; j < n; j++) {
			if (i == j) continue;
			ans += freq[op(arr[i], arr[j])];
			if (arr[i] == arr[j]) ans -= 2;
		}
	}
	ans /= 6;
	cout << ans << '\n';
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 30
• Subtask 3: 0 / 70