Ruudukko

#include <bits/stdc++.h>
using namespace std;

int fact(int x) {
	if (x <= 1)
		return 1;

	return x * fact(x - 1);
}

int main()
{
	ios_base::sync_with_stdio(0);
	cin.tie(0);

	int n;
	cin >> n;
	
	map<string, int> charOrigins;

	for (int i = 0; i < n; i++) {
		string s;
		cin >> s;
		map<char, int> charOriginMap;
		string charOriginString = "";

		for (unsigned int j = 0; j < s.size(); j++) {
			if (!charOriginMap[s[j]]) {
				charOriginMap[s[j]] = j;
			}

			charOriginString += charOriginMap[s[j]];
		}

		if (charOrigins[charOriginString]) {
			charOrigins[charOriginString]++;
		} else {
			charOrigins[charOriginString] = 1;
		}
	}

	int totalPairs = 0;

	for (auto i : charOrigins) {
		totalPairs += fact(i.second) / (2*fact(i.second - 2));
	}

	cout << totalPairs;
}

Test 1

Verdict: WRONG ANSWER

Test 2

Verdict: WRONG ANSWER

Test 3

Verdict: WRONG ANSWER

Test 4

Verdict: RUNTIME ERROR

Test 5

Verdict: RUNTIME ERROR

Test 6

Verdict: RUNTIME ERROR