///Minimele pe linii
///intr-o matrice dreptunghiulara.
#include <iostream>
using namespace std;

double a[100][50],mini;
int n,m;

int main()
{
    cout<<"n=";
    cin>>n;
    cout<<"m=";
    cin>>m;
    for(int i=0;i<n;i++)
      for(int j=0;j<m;j++)
       {
           cout<<"a["<<i<<"]["<<j<<"]=";
           cin>>a[i][j];
       }
    for(int i=0;i<n;i++)
     {
         mini=a[i][0];
         for(int j=0;j<m;j++)
           if(a[i][j]<mini)
             mini=a[i][j];
         cout<<mini<<" pe linia "<<i<<endl;
     }
    return 0;
}

///Maximele pe coloanele
///unei matrice dreptunghiulare.
#include <iostream>
using namespace std;

double a[100][50],maxi;
int n,m;

int main()
{
    cout<<"n=";
    cin>>n;
    cout<<"m=";
    cin>>m;
    for(int i=0;i<n;i++)
      for(int j=0;j<m;j++)
           cin>>a[i][j];
    for(int j=0;j<m;j++)
     {
         maxi=a[0][j];
         for(int i=0;i<n;i++)
           if(a[i][j]>maxi)
             maxi=a[i][j];
         cout<<maxi<<" pe coloana "<<j<<endl;
     }
    return 0;
}

///Suma elementelor de pe
///diagonala principala
///a unei matrice patratice.
#include <iostream>
using namespace std;

int a[100][100],n;
long s;

int main()
{
    s=0;
    cout<<"n=";
    cin>>n;
    for(int i=0;i<n;i++)
      for(int j=0;j<n;j++)
          cin>>a[i][j];
    for(int i=0;i<n;i++)
          s=s+a[i][i];
    cout<<s;
    return 0;
}

///Suma elem. pare
///de sub diag. princ.
#include <iostream>
using namespace std;

int a[100][100],n,ok;

int main()
{
    ok=0;
    cout<<"n=";
    cin>>n;
    for(int i=0;i<n;i++)
      for(int j=0;j<n;j++)
          cin>>a[i][j];
    for(int i=0;i<n;i++)
     for(int j=0;j<n;j++)
          if(i>j && a[i][j]%2==0)
            {
                cout<<a[i][j]<<" ";
                ok=1;
            }
    if(ok==0)
     cout<<"Nu exista";
    return 0;
}

///Daca exista sau nu
///elem. impare deasupra
///diag. princ.
#include <iostream>
using namespace std;

int a[100][100],n,ok;

int main()
{
    ok=0;
    cout<<"n=";
    cin>>n;
    for(int i=0;i<n;i++)
      for(int j=0;j<n;j++)
          cin>>a[i][j];
    for(int i=0;i<n;i++)
     for(int j=0;j<n;j++)
          if(i<j && a[i][j]%2!=0)
            {
                cout<<a[i][j]<<" ";
                ok=1;
            }
    if(ok==0)
     cout<<"Nu exista";
    return 0;
}

///Afisarea elementelor
///de pe "coaja" matricei
///dreptunghiulare.
#include <iostream>
using namespace std;

int a[100][50],n,m;

int main()
{

    cin>>n>>m;
    for(int i=0;i<n;i++)
      for(int j=0;j<m;j++)
           cin>>a[i][j];
    for(int j=0;j<m;j++)
     cout<<a[0][j]<<" ";
    for(int i=1;i<n;i++)
     cout<<a[i][m-1]<<" ";
    for(int j=m-2;j>=0;j--)
     cout<<a[n-1][j]<<" ";
    for(int i=n-2;i>=1;i--)
     cout<<a[i][0]<<" ";
    return 0;
}
///Maximele pe coloanele
///unei matrice dreptunghiulare.
#include <iostream>
using namespace std;

double a[100][50],maxi;
int n,m;

int main()
{
    cout<<"n=";
    cin>>n;
    cout<<"m=";
    cin>>m;
    for(int i=0;i<n;i++)
      for(int j=0;j<m;j++)
           cin>>a[i][j];
    for(int j=0;j<m;j++)
     {
         maxi=a[0][j];
         for(int i=0;i<n;i++)
           if(a[i][j]>maxi)
             maxi=a[i][j];
         cout<<maxi<<" pe coloana "<<j<<endl;
     }
    return 0;
}
///Cititi o matrice patratica.
///Afisati elementele situate
///deasupra diagonalei secundare
///care au suma cifrelor impara
///sau mesajul nu exista daca
///nu se gasesc asemenea elem.
#include <iostream>
using namespace std;

int a[100][100],n,ok,x;
long s;

int main()
{
    ok=0;
    cout<<"n=";
    cin>>n;
    for(int i=0;i<n;i++)
      for(int j=0;j<n;j++)
          cin>>a[i][j];
    cout<<endl;
    for(int i=0;i<n;i++)
     for(int j=0;j<n;j++)
          if(i+j<n-1)
            {
                s=0;
                x=a[i][j];
                while(x>0)
                 {
                     s+=x%10;
                     x=x/10;
                 }
                if(s%2!=0)
                  {
                    cout<<a[i][j]<<" ";
                    ok=1;
                  }
            }
    if(ok==0)
     cout<<"Nu exista";
    return 0;
}
///Cititi o matrice patratica.
///Afisati elementele de sub
///diagonala secundara care
///au ultimele 2 cifre egale
///sau mesajul "Nu exista" daca
///nu se gasesc asemenea elem.
#include <iostream>
using namespace std;

int a[100][100],n,ok;

int main()
{
    ok=0;
    cout<<"n=";
    cin>>n;
    for(int i=0;i<n;i++)
      for(int j=0;j<n;j++)
          cin>>a[i][j];
    cout<<endl;
    for(int i=0;i<n;i++)
     for(int j=0;j<n;j++)
          if(i+j>n-1)
            {
                if(a[i][j]%10==a[i][j]/10%10 && a[i][j]!=0)
                  {
                    cout<<a[i][j]<<" ";
                    ok=1;
                  }
            }
    if(ok==0)
     cout<<"Nu exista";
    return 0;
}