47 lines
987 B
C++
47 lines
987 B
C++
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#include <bits/stdc++.h>
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using namespace std;
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int main() {
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ios::sync_with_stdio(0);
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cin.tie(0);
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map<char, vector<pair<int, int>>> nodes;
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string line;
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vector<string> lines;
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while (getline(cin, line) && !line.empty()) {
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lines.push_back(line);
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}
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int mx = lines.size(), my = lines[0].size();
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for (int x = 0; x < mx; x++) {
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for (int y = 0; y < my; y++) {
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char c = lines[x][y];
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if (c != '.') {
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nodes[c].push_back({x, y});
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}
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}
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}
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set<pair<int, int>> total;
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for (auto &[c, poss] : nodes) {
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for (int a = 1; a < poss.size(); a++) {
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for (int b = 0; b < a; b++) {
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vector<pair<int, int>> pos = {
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{poss[b].first * 2 - poss[a].first,
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poss[b].second * 2 - poss[a].second},
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{poss[a].first * 2 - poss[b].first,
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poss[a].second * 2 - poss[b].second}};
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for (auto &x : pos) {
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if (x.first >= 0 && x.first < mx && x.second >= 0 &&
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x.second < my) {
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total.insert(x);
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}
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}
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}
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}
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}
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cout << total.size() << '\n';
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}
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