int two_sum(){  

    int target = 19;

    int n = 10;

    int arr[n] = {1,2,3,4,5,6,7,8,9,10};

    int l = 0;

    int r = n-1;

    while (l<r) {

        // If we find a pair

        if(arr[l] + arr[r] == target)

            return 1;

        else if (arr[l] + arr[r] < target)

            l++;

        else

            r--;

    }

    return -1;

}

#include <iostream>

using namespace std;

int main() 

{

int num1, num2, sum; 

cout<<"Enter the first number.\n";

cin>>num1;

cout<<"Enter the second number.\n";

cin>>num2;

sum = num1 + num2;

cout<<"The sum is \n"<<sum;

return 0;

}

bool twosum(int A[], int N, int X) {

    sort(A, A+N);

    int i = 0, j = N-1;

    while (i < j) {

        if (A[i] + A[j] == X) return true;

        else if (A[i] + A[j] > X) j--;

        else i++;

    }

    return false;

}

#include <iostream>

​

int main(){

    float sum=0;

    int array [3][5] = 

    {

        { 1, 2, 3, 4, 5, }, // row 0

        { 6, 7, 8, 9, 10, }, // row 1

        { 11, 12, 13, 14, 15 } // row 2

    };

  for ( i = 0; i < 3; i++ ){

    for ( j = 0; j < 5; j++ ){

      sum+=array[i][j];

    }

  }

  std::cout << sum << std::endl;

}