Submission #862185

#	Time	Username	Problem	Language	Result	Execution time	Memory
862185		TAhmed33	Set (COCI21_set)	C++98	10 / 110	1068 ms	150352 KiB

Main

#include <bits/stdc++.h>
using namespace std;
string op (string a, string b) {
	string ret;
	for (int i = 0; i < (int)a.length(); i++) {
		if (a[i] == b[i]) ret += a[i];
		else {
			set <char> x = {'1', '2', '3'};
			x.erase(a[i]); x.erase(b[i]);
			ret += *(x.begin());
		}
	}
	return ret;
}
string op2[2188][2188];
int main () {
	int n, m;
	cin >> n >> m;
	string arr[n];
	for (int i = 0; i < n; i++) cin >> arr[i];
	for (int i = 0; i < n; i++) {
		for (int j = 0; j < i; j++) {
			op2[i][j] = op(arr[i], arr[j]);
		}
	}
	long long ans = 0;
	for (int i = 0; i < n; i++) {
		unordered_map <string, int> freq2;
		for (int j = 0; j < i; j++) {
			if (arr[i] == arr[j]) continue;
			ans += freq2[op2[i][j]];
			freq2[arr[j]]++;
		}
		ans += freq2[arr[i]] * (freq2[arr[i]] - 1) / 2;
	}
	cout << ans << '\n';
}

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