Create 1381. Design a Stack With Increment

1381. Design a Stack With Increment

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+class CustomStack {
+public:
+    int k;
+    vector<int> v;
+    CustomStack(int maxSize) {
+        k = maxSize;
+    }
+
+    void push(int x) {
+        if(v.size()<k){
+            v.push_back(x);
+        }
+    }
+
+    int pop() {
+        if(v.size()>0){
+            int x = v[v.size()-1];
+            v.pop_back();
+            return x;
+        }
+        else return -1;
+    }
+
+    void increment(int t, int val) {
+        for(int i=0; i<min((int)v.size(), t); i++){
+            v[i]+=val;
+        }
+    }
+};
+
+/**
+ * Your CustomStack object will be instantiated and called as such:
+ * CustomStack* obj = new CustomStack(maxSize);
+ * obj->push(x);
+ * int param_2 = obj->pop();
+ * obj->increment(k,val);
+ */