// 1
#include <iomanip>
#include <iostream>
#include <cmath>
using namespace std;
void nuskaitymas (int &n, int A[]);
int suma (int n, int A[]);
int main () {
    int n;
    int A[100000];
    nuskaitymas(n, A);
    cout << suma(n, A) << endl;
    return 0;
}
void nuskaitymas (int &n, int A[]){
    cin >> n;
    for (int i = 0; i < n; i++){
        cin >> A[i];
    }
}
int suma (int n, int A[]){
    int sum = 0;
    for (int i = 0; i < n; i++){
        sum += A[i];
    }
    return sum;
}
////////////////////////////////

//2

#include <iomanip>
#include <iostream>
#include <cmath>
using namespace std;
int main () {
    int n;
    int A[11];
    int suma = 0, x = 0;
    double vidurkis = 0;
    cin >> n;
    for (int i = 0; i < n; i++){
        cin >> A[i];
        if (A[i] < 0){
            suma += A[i];
            x++;
        }
    }
    if (x == 0) cout << "NO";
    else {
        vidurkis = suma * 0.1 * 10 / x;
        cout << fixed << setprecision(2) << vidurkis;
    }

    return 0;
}

//////////////////

// 3
#include <iomanip>
#include <iostream>
#include <cmath>
using namespace std;

void skaitymas (int A[], int &n);

int main () {
    int n;
    int A[11];
    int vieta = 0;
    int x = 0;
    int kint = 1000001;
    skaitymas(A, n);
    for (int i = 0; i < n; i++){
        if ((A[i] != 0) && (A[i] % 2 == 0)){
         if (A[i] < kint){
            kint = A[i];
            vieta = i;
            x++;
         }
    }
    }
    if (x > 0) cout << A[vieta];
    else cout << "No";
    return 0;
}

void skaitymas (int A[], int &n)
{
    cin >> n;
    for (int i = 0; i < n; i++){
        cin >> A[i];
    }
}

//////////////////////

// 5

#include <iomanip>
#include <iostream>
#include <cmath>
using namespace std;
int main ()
{
    int n;
    int A[11];
    int x = 0;
    cin >> n;
    for (int i = 0; i < n; i++){
        cin >> A[i];
    }
    for (int i = 0; i < n; i++){
        for (int j = i+1; j < n; j++){
            if (A[i] == A[j]) x++;
        }
    }
    if (x > 0) cout << "NE";
    else cout << "TAIP";


    return 0;
}

//////////////////////////////////

// 8

#include <iomanip>
#include <iostream>
#include <cmath>
using namespace std;
void input (int A[][12], int &n, int &m, int &k);
int suma (int A[][12], int n, int m, int k);
int main ()
{
    int n, m, k;
    int A[12][12];
    int sum;
    input(A, n, m, k);
    sum = suma(A, n, m, k);
    if (k < m) cout << sum;
    else cout << "NO";
    return 0;
}
void input (int A[][12], int &n, int &m, int &k)
{
    cin >> n >> m >> k;
    for (int i = 0; i < n; i++){
        for (int j = 0; j < m; j++){
            cin >> A[i][j];
        }
    }
}
int suma (int A[][12], int n, int m, int k)
{
    int suma = 0;
    for (int i = 0; i < n; i++){
        for (int j = k; j < m; j++){
            suma += A[i][j];
        }
    }
    return suma;
}

/////////////////////////////

// 9

#include <iomanip>
#include <iostream>
#include <cmath>
using namespace std;
void input (int A[][12], int &n, int &m);
int didzVieta (int A[][12], int n, int m);
double vidurkis (int A[][12], int n, int m, int max);
int main ()
{
    int n, m;
    int A[12][12];
    int max;
    double vid;
    input(A, n, m);
    max = didzVieta(A, n, m);
    vid = vidurkis(A, n, m, max);
    cout << fixed << setprecision(2) << vid;
    return 0;
}
void input (int A[][12], int &n, int &m)
{
    cin >> n >> m;
    for (int i = 0; i < n; i++){
        for (int j = 0; j < m; j++){
            cin >> A[i][j];
        }
    }
}
int didzVieta (int A[][12], int n, int m)
{
    int x = 0, y = 0;
    for (int i = 0; i < n; i++){
        for (int j = 0; j < m; j++){
            if (A[i][j] > A[x][y]){
                x = i;
                y = j;
            }
        }
    }
    return x;
}
double vidurkis (int A[][12], int n, int m, int max)
{
    int suma = 0;
    double vid = 0;
    for (int j = 0; j < m; j++){
        suma += A[max][j];
        vid++;
    }
    vid = suma * 0.1 * 10 / vid;
    return vid;
}

/////////////////////////////////

// 10

#include <iomanip>
#include <iostream>
#include <cmath>
using namespace std;
void input (int A[][12], int &n);
int suma (int A[][12], int n);
int main ()
{
    int n;
    int A[12][12];
    int sum;
    input(A, n);
    sum = suma(A, n);
    if (n > 1) cout << sum;
    else cout << "No";
    return 0;
}
void input (int A[][12], int &n)
{
    cin >> n;
    for (int i = 0; i < n; i++){
        for (int j = 0; j < n; j++){
            cin >> A[i][j];
        }
    }
}
int suma (int A[][12], int n)
{
    int suma = 0;
    for (int i = 0; i < n; i++){
        for (int j = 0; j < n; j++){
            if (i > j) suma += A[i][j];
        }
    }
    return suma;
}