med_m_pat

#include <iostream>
#include <cmath>
using namespace std;

int main() {
int a[100][100],n,i,j,nr;
float m1=0.0,m2=0.0;
cout<<"n=";cin>>n;
for (i=0;i<n;i++)
for (j=0;j<n;j++)
    cin>>a[i][j];
nr=0;
for (i=0;i<n-1;i++)
    for (j=i+1;j<n;j++)
    if (a[i][j]>0) {
    m1+=a[i][j];
    nr++;
    }
    m1=(float)m1/(float)nr;
    nr=0;
   for (i=1;i<n;i++)
   for (j=0;j<i;j++)
   if (a[i][j]>0) {
    m2+=a[i][j];
    nr++;
   }
  m2=(float)m2/(float)nr;
 cout<<"dif:"<<abs(m1-m2)<<endl;
  return 0;
}