20240907 md's submission for cf858d (#6477)

daily_problems/2024/09/0907/personal_submission/cf858d_md.cpp

@@ -0,0 +1,42 @@
+// 0907
+#include <bits/stdc++.h>
+
+int main() {
+    std::ios::sync_with_stdio(false);
+    std::cin.tie(nullptr);
+
+    int n;
+    std::cin >> n;
+    std::vector<std::string> nums(n);
+    std::vector<std::vector<std::string>> hash(n);
+    std::map<std::string, int> cnt;
+    for (int i = 0; i < n; ++i) {
+        std::cin >> nums[i];
+        for (int len = 1; len <= 9; ++len) {
+            std::set<std::string> patterns;
+
+            for (int left = 0; left + len <= 9; ++left) {
+                std::string sub = nums[i].substr(left, len);
+                patterns.insert(sub);
+            }
+
+            for (auto pattern : patterns) {
+                hash[i].push_back(pattern);
+                cnt[pattern]++;
+            }
+        }
+
+    }
+
+    for (int i = 0; i < n; ++i) {
+        for (auto& sub : hash[i]) {
+            if (cnt[sub] == 1) {
+                std::cout << sub << '\n';
+                break;
+            }
+        }
+    }
+
+
+    return 0;
+}