#include <iostream>
using namespace std;
int main()
{ int a[10][10],n,m,k,i,j,s=0;
cout<<"k="; cin>>k;
cout<<"m="; cin>>m; //astea sunt coloane
cout<<"n="; cin>>n //astea sunt linii
for(i=1;i<=n;i++)
{for(j=1;j<=m;j++)
cout<<"a["<<i<<"]["<<j<<"]=";
cin>>a[i][j];}
for(j=1;j<=m;j++)
s=s+a[k][j];
cout<<s; //s este suma pe care ai cerut-o
