CP answers

ADD Competitive Programming answers here.
#include<iostream>
using namespace std;;

Q.1
int main(){
    int a,b,x;
    cout<<"Enter number: ";
    cin>>a>>b;
    x=a*b;
    cout<<"multi. is: "<<x<<endl;
    return 0;
}

Q.2
int main(){
    int a;
    cout<<"Enter number: ";
    cin>>a;
    if(a%2==0){
        cout<<"number is even"<<endl;
    }
    else{
        cout<<"Number is odd"<<endl;
    }
    return 0;
}

// Q3.


int fact(int n){
    if(n==0){
        return 1;
    }
    else if(n<0){
        return -1;
    }
    else{
        return n*fact(n-1);
    }
}
int main(){
	
	cout<<fact(6)<<endl;
}

//Q4.
#include<iostream>
#include<string.h>
using namespace std;

int main(){
	string s;
	cin>>s;
	int count;
	int len=s.size();
	
	for(int i=0; i<len; i++){
		if(s[i]=='a' || s[i]=='e' || s[i]=='i'|| s[i]=='o'|| s[i]=='u'){
			
			count++;
		}
		
	}
	
	cout<<"Number of vowels is: "<<count;
}

Q5.

#include<stdio.h>

int max(int arr[],int n){
	int max,i;
 	max=arr[0];
    for(i=1; i<n; i++)
    {
		   if(max<arr[i]){
		    max=arr[i];   }    
    }
    

    cout<<"maximum of array is : "<<max<<endl;

}

//Q6. 
#include <iostream>
using namespace std;

int min(int arr[], int n) {
    int min = arr[0];
    for (int i = 1; i < n; i++) {
        if (arr[i] < min) { 
            min = arr[i];   
        }
    }
    return min;
}

int main() {
    int n;
    int arr[100];
    cout << "Enter the size of the array: ";
    cin >> n;
    cout << "Enter the elements of the array: ";
    for (int i = 0; i < n; i++) {
        cin >> arr[i];
    }
    int minimum = min(arr, n); 
    cout << "The minimum of the array is " << minimum << endl;
    return 0;
}





int main(){
    int n;
    int arr[100];
    cout<<"enter the size of arry";
    cin>>n;
    cout<<"enter the element of arry";
    for(int i=0;i<n;i++){
         cin>>arr[i];
    }
    max(arr,n);
}



//Q.7
int main(){
    int a,b,temp;
    cout<<"enter numbers: ";
    cin>>a>>b;
    cout<<"before: "<<endl;
    cout<<a<<" "<<b<<endl;

    temp=a;
    a=b;
    b=temp;

    cout<<"after: "<<endl;
    cout<<a<<" "<<b<<endl
}

//Q8. 
int main(){
    int year;
    cout<<"enter year: "<<endl;
    cin>>year;

    if(year%4==0){
        cout<<"leap year"<<endl;
    }
    else if(year%100==0){
        cout<<"not a leap year"<<endl;
    }
    else if(year%400==0){
        cout<<"leap year"<<endl;
    }
    else{
        cout<<"leap year"<<endl;
    }
}

//Q9.


void reverseStr(string& str)
{
	int n = str.length();

	
	for (int i = 0; i < n / 2; i++)
		swap(str[i], str[n - i - 1]);
}

int main()
{
	string str = "gdsc";
	reverseStr(str);
	cout << str;
	return 0;
}

// Q10.


int main(){
    int a,b,c;
    cin>>a>>b>>c;
    if(a>b && b>c){
        cout<<"number 1 is maximum   "<<a;
    }
    else if(b>c && b>a){
        cout<<"number 2 is maximum   "<<b;
    }
    else{
        cout<<"number 3 is maximum  "<<c;
    }
}
//MCQ 1

A) O(N)

// MCQ2
B) Stack

//MCQ3
B)exit the loop

//MCQ4
A) sorted


//MCQ5
B) The number of operations it performs