/* */
#include <iostream> 
#include <cstdlib>
#include <cmath>
using namespace std;
int main(int argc, char *argv[])
{ int N, r1, r2;
  int A[50][50]; 
  cout<<"N= ?"; 
  cin>>N; 
  for (int i=0; i<N; i++) {
    for (int j=0; j<N; j++) {
    cout<<"A["<<i<<"]["<<j<<"]= ?"; 
    cin>>A[i][j];
  }}   
  cout<<"r1, r2= ?"; 
  cin>>r1>>r2; 
  int trace=0, min_diag=A[0][0];
  for (int i=0; i<N; i++) {
      trace += A[i][i];
      if (A[i][i]<min_diag) min_diag=A[i][i];}
  cout<<trace<<" "<<min_diag<<endl;; 
  for (int i=0; i<N; i++) {A[r2][i]=A[r2][i]-A[r1][i];}   
  for (int i=0; i<N; i++) {
   for (int j=0; j<N; j++) 
      cout<<A[i][j]<<" ";
  cout<<endl;   
  }    
  system("PAUSE");
  return 0;
}