some tasks

contests/4contest/3.cpp

@@ -1,22 +1,39 @@
 #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());
+void process(const std::vector<int>& v1, std::vector<int>& v2) {
+    std::vector<int> copy_v1(v1);
+    std::sort(copy_v1.begin(), copy_v1.end());
+    auto last = std::unique(copy_v1.begin(), copy_v1.end());
+    copy_v1.erase(last, copy_v1.end());
 
-    if (set1.empty() || mas2.empty()) {
-        return;
-    }
+    auto iter = --v2.end();
+    int num = (int)v2.size() - 1;
 
-    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);
+    while (iter != --v2.begin()) {
+        if (std::binary_search(copy_v1.begin(), copy_v1.end(), num)) {
+            iter = v2.erase(iter);
         }
+
+        num--;
+        iter--;
     }
 
     return;
-}
+}
+
+
+// #include <iostream>
+// int main() {
+//     std::vector<int> v1 = { 0, 2, 4, 10, -6, 2, 2, 4 };
+//     std::vector<int> v2 = { 0, 2, 4, 10, -6, 2, 2, 4 };
+
+//     process(v1, v2);
+
+//     for (auto& i : v2) {
+//         std::cout << i << " ";
+//     }
+//     std::cout << std::endl;
+
+//     return 0;
+// }