Solved 3 problems in today's Div3 round

4 files changed, 198 insertions, 0 deletions

diff --git a/codeforces/RudolphAndTicTacToe/main b/codeforces/RudolphAndTicTacToe/main
new file mode 100755
index 0000000..a4f1dae
--- /dev/null
+++ b/codeforces/RudolphAndTicTacToe/main
diff --git a/codeforces/RudolphAndTicTacToe/main.cpp b/codeforces/RudolphAndTicTacToe/main.cpp
new file mode 100755
index 0000000..650f957
--- /dev/null
+++ b/codeforces/RudolphAndTicTacToe/main.cpp
@@ -0,0 +1,177 @@
+#include <bits/stdc++.h>
+using namespace std;
+
+using ll = long long;
+using pii = pair<int, int>;
+using vpi = vector<pii>;
+using vi = vector<int>;
+using vll = vector<long long>;
+using mpii = map<int, int>;
+using mpll = map<ll, ll>;
+using db = long double;
+
+#define pb push_back
+#define all(x) (x).begin(), (x).end()
+#define rall(x) (x).rbegin(), (x).rend()
+#define lb lower_bound
+#define ub upper_bound
+#define make_unique(x)                                                         \
+  sort(all((x)));                                                              \
+  (x).resize(unique(all((x))) - (x).begin())
+#define ceil(a, b) ((a) + (b) - 1) / (b))
+
+const int MOD = (int)1e9 + 7;
+const db PI = acos((db)-1);
+const int dx[4]{1, 0, -1, 0};
+const int dy[4]{0, 1, 0, -1};
+
+template <typename K, typename V>
+ostream &operator<<(ostream &os, const pair<K, V> &p);
+template <typename T> ostream &operator<<(ostream &os, const vector<T> &vec);
+template <typename K, typename V>
+ostream &operator<<(ostream &os, const map<K, V> &m);
+template <typename K, typename V>
+ostream &operator<<(ostream &os, const unordered_map<K, V> &m);
+template <typename T> ostream &operator<<(ostream &os, const set<T> &s);
+template <typename T>
+ostream &operator<<(ostream &os, const unordered_set<T> &s);
+
+template <typename K, typename V>
+ostream &operator<<(ostream &os, const pair<K, V> &p) {
+  os << "(" << p.first << ", " << p.second << ")";
+  return os;
+}
+
+template <typename T> ostream &operator<<(ostream &os, const vector<T> &vec) {
+  os << "{";
+  for (size_t i = 0; i < vec.size(); ++i) {
+    if (i > 0)
+      os << ", ";
+    os << vec[i];
+  }
+  os << "}";
+  return os;
+}
+
+template <typename K, typename V>
+ostream &operator<<(ostream &os, const map<K, V> &m) {
+  os << "{";
+  for (const auto &p : m) {
+    os << p.first << ": " << p.second << ", ";
+  }
+  os << "}";
+  return os;
+}
+
+template <typename K, typename V>
+ostream &operator<<(ostream &os, const unordered_map<K, V> &m) {
+  os << "{";
+  for (const auto &p : m) {
+    os << p.first << ": " << p.second << ", ";
+  }
+  os << "}";
+  return os;
+}
+
+template <typename T> ostream &operator<<(ostream &os, const set<T> &s) {
+  int i = 0;
+  os << "{";
+  for (const auto &e : s) {
+    if (i > 0)
+      os << ", ";
+    os << e;
+    i++;
+  }
+  os << "}";
+  return os;
+}
+
+template <typename T>
+ostream &operator<<(ostream &os, const unordered_set<T> &s) {
+  int i = 0;
+  os << "{";
+  for (const auto &e : s) {
+    if (i > 0)
+      os << ", ";
+    os << e;
+    i++;
+  }
+  os << "}";
+  return os;
+}
+
+void dbg() { cerr << "\n"; }
+
+template <typename T, typename... TS> void dbg(T val, TS... vals) {
+  cerr << val << " ";
+  dbg(vals...);
+}
+
+/* stuff you should look for:
+  ---------------------------
+   * special cases (n=1?)
+   * int overflow, array bounds
+   * do smth instead of nothing and stay organized
+   * WRITE STUFF DOWN
+   * DON'T GET STUCK ON ONE APPROACH
+ */
+
+bool isWinner(const vector<string> &board, char player) {
+  // Check rows
+  for (int i = 0; i < 3; ++i) {
+    if (board[i][0] == player && board[i][1] == player &&
+        board[i][2] == player) {
+      return true;
+    }
+  }
+
+  // Check columns
+  for (int i = 0; i < 3; ++i) {
+    if (board[0][i] == player && board[1][i] == player &&
+        board[2][i] == player) {
+      return true;
+    }
+  }
+
+  // Check diagonals
+  if ((board[0][0] == player && board[1][1] == player &&
+       board[2][2] == player) ||
+      (board[0][2] == player && board[1][1] == player &&
+       board[2][0] == player)) {
+    return true;
+  }
+
+  return false;
+}
+
+char checkWinner(const vector<string> &board) {
+  for (char player : {'X', 'O', '+'}) {
+    if (isWinner(board, player)) {
+      return player;
+    }
+  }
+  return '.'; // '\0' represents no winner
+}
+
+void solve() {
+  vector<string> v(3);
+  for (int i = 0; i < 3; i++) {
+    cin >> v[i];
+  }
+  char winner = checkWinner(v);
+  if (winner == '.') {
+    cout << "DRAW\n";
+  } else {
+    cout << winner << "\n";
+  }
+}
+
+int main() {
+  ios_base::sync_with_stdio(false);
+  cin.tie(NULL);
+  int tt;
+  cin >> tt;
+  while (tt--) {
+    solve();
+  }
+}
diff --git a/codeforces/RudolphAndTicTacToe/main_input0.txt b/codeforces/RudolphAndTicTacToe/main_input0.txt
new file mode 100644
index 0000000..f807a3a
--- /dev/null
+++ b/codeforces/RudolphAndTicTacToe/main_input0.txt
@@ -0,0 +1,16 @@
+5
++X+
+OXO
+OX.
+O+.
++OX
+X+O
+.XO
+OX.
++++
+O.+
+X.O
++..
+.++
+X.O
++..
diff --git a/codeforces/RudolphAndTicTacToe/main_output0.txt b/codeforces/RudolphAndTicTacToe/main_output0.txt
new file mode 100644
index 0000000..e1566f0
--- /dev/null
+++ b/codeforces/RudolphAndTicTacToe/main_output0.txt
@@ -0,0 +1,5 @@
+X
+O
++
+DRAW
+DRAW