Submission #862186

#	Time	Username	Problem	Language	Result	Execution time	Memory
862186		TAhmed33	Set (COCI21_set)	C++98	10 / 110	1096 ms	500 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 {
			set <char> x = {'1', '2', '3'};
			x.erase(a[i]); x.erase(b[i]);
			ret += *(x.begin()) - '0';
		}
	}
	return ret;
}
int freq[6563];
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 () {
	int n, m;
	cin >> n >> m;
	for (int i = 0; i < n; i++) cin >> arr[i];
	for (int i = 0; i < n; i++) freq[hashh(arr[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: 10 / 10
• Subtask 2: 0 / 30
• Subtask 3: 0 / 70