CF 798, didnt get far

codeforces/rounds/798/a.cpp

@@ -0,0 +1,85 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+void test_case(int tc){
+    int n, m, k;
+
+    cin >> n >> m >> k;
+
+    vector<char> x, y;
+    for (size_t i = 0; i < n; i++){
+        char c;
+        cin >> c;
+        x.push_back(c);
+    }
+    for (size_t i = 0; i < m; i++){
+        char c;
+        cin >> c;
+        y.push_back(c);
+    }
+
+    int k_counter = 0;
+    string result = "";
+    // We need to keep track of the last one for optimal placement I think
+    bool lastChoice = x.front() < y.front();
+
+    sort(x.begin(), x.end());
+    reverse(x.begin(), x.end());
+
+    sort(y.begin(), y.end());
+    reverse(y.begin(), y.end());
+
+    while(!x.empty() && !y.empty()){
+        char cx = x.back(), cy = y.back();
+
+        if(lastChoice != (cx < cy)){
+            k_counter = 0;
+        }
+        
+        if(lastChoice == (cx < cy) && k_counter == k){
+            k_counter = 0;
+            lastChoice = cx >= cy;
+
+            if(cx < cy){
+                y.pop_back();
+                result.push_back(cy);
+            } else {
+                x.pop_back();
+                result.push_back(cx);
+            }
+        } else {
+            lastChoice = cx < cy;
+
+            if(cx < cy){
+                x.pop_back();
+                result.push_back(cx);
+            } else{
+                y.pop_back();
+                result.push_back(cy);
+            }
+        }
+
+        k_counter++;
+    }
+
+    cout << result << '\n';
+}
+
+
+
+int main(){
+    ios::sync_with_stdio(0);
+    cin.tie(0);
+
+    int t;
+    cin >> t;
+
+    for(int tc = 1; tc <= t; ++tc){
+        test_case(tc);
+    }
+
+    cout << flush;
+
+    return 0;
+}

codeforces/rounds/798/b.cpp

@@ -0,0 +1,82 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+void test_case(int tc){
+    int n;
+    cin >> n;
+
+    if(n == 1){
+        cout << "-1\n";
+        return;
+    }
+
+    vector<int> p(n);
+    array<bool, 10> numbers;
+
+    for(int i = 1; i < 10; ++i){
+        numbers[i] = false;
+    }
+
+    for(int i = 0; i < n; ++i){
+        cin >> p[i];
+        numbers[p[i]] = true;
+    }
+
+    vector<int> result;
+
+    for(int i = 0; i < n - 2; ++i){
+        for(int j = 1; j < 10; ++j){
+            if(j != p[i] && numbers[j]){
+                numbers[j] = false;
+                result.push_back(j);
+                break;
+            }
+        }
+    }
+
+    int a, b;
+    for(int j = 1; j < 10; ++j){
+        if(numbers[j]){
+            a = j;
+            numbers[j] = false;
+            break;
+        }
+    }
+
+    for(int j = 1; j < 10; ++j){
+        if(numbers[j]){
+            b = j;
+            break;
+        }
+    }
+
+    if(a == p[n - 2]){
+        swap(a, b);
+    }
+
+    result.push_back(b);
+    result.push_back(a);
+
+    for(int i : result){
+        cout << i << " ";
+    } cout << '\n';
+}
+
+
+
+int main(){
+    ios::sync_with_stdio(0);
+    cin.tie(0);
+
+    int t;
+    cin >> t;
+
+    for(int tc = 1; tc <= t; ++tc){
+        test_case(tc);
+    }
+
+    cout << flush;
+
+    return 0;
+}

codeforces/rounds/798/c.cpp

@@ -0,0 +1,25 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+void test_case(int tc){
+
+}
+
+
+
+int main(){
+    ios::sync_with_stdio(0);
+    cin.tie(0);
+
+    int t;
+    cin >> t;
+
+    for(int tc = 1; tc <= t; ++tc){
+        test_case(tc);
+    }
+
+    cout << flush;
+
+    return 0;
+}

codeforces/rounds/798/d.cpp

@@ -0,0 +1,25 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+void test_case(int tc){
+
+}
+
+
+
+int main(){
+    ios::sync_with_stdio(0);
+    cin.tie(0);
+
+    int t;
+    cin >> t;
+
+    for(int tc = 1; tc <= t; ++tc){
+        test_case(tc);
+    }
+
+    cout << flush;
+
+    return 0;
+}

codeforces/rounds/798/e.cpp

@@ -0,0 +1,25 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+void test_case(int tc){
+
+}
+
+
+
+int main(){
+    ios::sync_with_stdio(0);
+    cin.tie(0);
+
+    int t;
+    cin >> t;
+
+    for(int tc = 1; tc <= t; ++tc){
+        test_case(tc);
+    }
+
+    cout << flush;
+
+    return 0;
+}