Added count_subarrays.cpp, add.cpp, n_times.cpp, power_of_two.cpp

Author: Nova-007

C++/InvertPyramid.c++

@@ -0,0 +1,19 @@
+#include<iostream>
+#include<vector>
+using namespace std;
+
+#define vii vector<int>
+
+int solve(){
+    int a,b; cin >> a >> b;
+    return a+b;
+}
+
+int main(){
+    int t=1;
+    // cin >> t;
+    while(t--){
+        cout << solve() << "\n";
+    }
+    return 0;
+}

C++/add.cpp

@@ -0,0 +1,28 @@
+#include<iostream>
+#include<vector>
+using namespace std;
+
+#define vii vector<int>
+
+int solve(){
+    int n;  cin>> n;
+    vii vec(n, 0);
+    for(int i=0; i<n; i++) cin >> vec[i];
+    int cnt =0;
+    for(int i=0; i<n; i++){
+        for(int j=i; j<n; j++){
+            if(j>0 && i!=j && vec[j]<vec[j-1])
+                break;
+            cnt++;
+        }
+    }
+    return cnt;
+}
+
+int main(){
+    int t;  cin >> t;
+    while(t--){
+        cout << solve() << "\n";
+    }
+    return 0;
+}

C++/count_subarrays.cpp

@@ -0,0 +1,21 @@
+#include<iostream>
+#include<vector>
+using namespace std;
+
+#define vii vector<int>
+
+int solve(){
+    int n;  cin>> n;
+    char c; cin >> c;
+    for(int i=0; i<n; i++)
+        cout << c  << " "; 
+}
+
+int main(){
+    int t;  cin >> t;
+    while(t--){
+        solve();
+        cout << "\n";
+    }
+    return 0;
+}

C++/n_times.cpp

@@ -0,0 +1,11 @@
+#include<iostream>
+#include<vector>
+using namespace std;
+
+
+int main(){
+    long long  n;
+    cin >> n; 
+    cout << ((__builtin_popcountll(n)==1) ? "YES" : "NO");
+    return 0;
+}