init commit

contests/4contest/3.cpp

@@ -0,0 +1,22 @@
+#include <vector>
+#include <set>
+#include <algorithm>
+#include <cstdint>
+
+void process(const std::vector<int>& mas1, std::vector<int>& mas2) {
+    std::set<int> set1(mas1.begin(), mas1.end());
+
+    if (set1.empty() || mas2.empty()) {
+        return;
+    }
+
+    for (auto it = mas2.end() - 1; it != mas2.begin() - 1; --it) {
+        int dst = it - mas2.begin();
+
+        if (std::find(set1.begin(), set1.end(), dst) != set1.end()) {
+            mas2.erase(it);
+        }
+    }
+
+    return;
+}