Section One

1.1.1

 #include <iostream>
 using namespace std;
 
 int main()
 {
     int a,b,N;
     cin >> N;
     while ( cin >>a >>b)
     {
         cout << a+b <<endl;
     }
     return ;
 }

1.1.2

 #include <iostream>
 using namespace std;
 
 int main()
 {
     int a,b,N;
     cin >> N;
     for (int i = N; i > ; i--)
     {
         cin >>a >>b;
         cout << a+b <<endl;
     }
 
     return ;
 }

1.1.3

#include <iostream>
using namespace std;
 
int main()
{
    int a,b;
    while ((cin >>a >>b) && (a||b))
    {
        cout << a+b <<endl;
    }
    return ;
}

1.1.4

#include <iostream>
using namespace std;
 
#define MAXN 1000 + 10 //不能加分号
int main()
{
    int N;
    int arr[MAXN] = {};
//    arr[MAXN] ;
    while ((cin >>N) && N)
    {
        int sum = ;
        for (int i=N; i>; i--)
        {
            cin >> arr[i];
            sum += arr[i];
        }
        cout << sum << endl;
    }
    return ;
}

1.1.5

 #include <iostream>
 using namespace std;
 
 #define MAXN 1000 + 10 //不能加分号
 int main()
 {
     int N;
     int arr[MAXN] = {};
 //    arr[MAXN] ;
     int M;
     cin >> M;
     while ((cin >>N) && (M>))
     {
         M--;
         int sum = ;
         for (int i=N; i>; i--)
         {
             cin >> arr[i];
             sum += arr[i];
         }
         cout << sum << endl;
     }
     return ;
 }

1.1.6

#include <iostream>
using namespace std;
 
#define MAXN 1000 + 10 //不能加分号
int main()
{
    int N;
    int arr[MAXN] = {};
    while ((cin >>N) )
    {
        int sum = ;
        for (int i=N; i>; i--)
        {
            cin >> arr[i];
            sum += arr[i];
        }
        cout << sum << endl;
    }
    return ;
}

1.1.7

 #include <iostream>
 using namespace std;
 
 int main()
 {
     int a,b;
     while (cin >> a >> b)
     {
         cout << a+b << endl << endl;
     }
     return ;
 }

1.1.8

 #include <iostream>
 using namespace std;
 
 #define MAXN 1000 + 10 //不能加分号
 int main()
 {
     int N;
     int arr[MAXN] = {};
     int M;
     cin >> M;
     while ((cin >>N) && (M>))
     {
         M--;
         int sum = ;
         for (int i=N; i>; i--)
         {
             cin >> arr[i];
             sum += arr[i];
         }
         (M!=)?(cout << sum << endl << endl):(cout << sum <<endl);
     }
     return ;
 }