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Author: BrandonTang89

Other_Tasks/CF2067_A_Adjacent_Digit_Sums.py

@@ -0,0 +1,14 @@
+t = int(input())
+for _ in range(t):
+    x, y = map(int, input().split())
+    if x + 1 == y:
+        print("Yes")
+        continue
+    if x < y:
+        print("No")
+        continue
+    
+    if (x - y) % 9 == 8:
+        print("Yes")
+    else:
+        print("No")

Other_Tasks/CF2067_B_Two_Large_Bags.cpp

@@ -0,0 +1,55 @@
+#pragma GCC optimize("Ofast")
+#pragma GCC optimize("unroll-loops")
+#include <bits/stdc++.h>  
+using namespace std;
+
+typedef long long ll;
+
+int main(){
+    int tc;
+    cin >> tc;
+    while(tc--){
+        int n;
+        cin >> n;
+        vector<int> v(n);
+        map<int, int> m;
+        for (int i = 0; i < n; i++){
+            cin >> v[i];
+            m[v[i]]++;
+        }
+
+        int prev = -1;
+        int prevNum = 0;
+        bool can = true;
+        while (!m.empty()){
+            int val = m.begin()->first;
+            int num = m.begin()->second;
+            m.erase(m.begin());
+
+            if (prev + 1 == val){
+                num += prevNum;
+            }
+            else if (prevNum > 0){
+                m.insert({val, num});
+                val = prev + 1;
+                num = prevNum;
+            }
+
+            if (num == 1){
+                can = false;
+                break;
+            }
+            num -= 2;
+            prev = val;
+            prevNum = num;
+        }
+        if (prevNum % 2 == 1){
+            can = false;
+        }
+
+        cout << (can ? "Yes" : "No") << endl;
+
+    }
+
+    return 0;
+}