The input elements of R*C matrix is passed
as the input (R is the number of rows and C is the number of columns in the
matrix. The program must print the sum S of the elements along the edge of the
matrix.
Input
Format:
The first line contains R and C separated
by a space. Next R lines contain C values each, with the values separated by a
space.
Output
Format:
The first line contains S.
Boundary
Conditions:
2 <= R, C <= 100 1 <= Matrix Cell
Value <= 1000
Example
Input/Output 1:
Input:
5 3
1 2 3
4 5 6
7 8 9
5 5 5
2 2 2
Output:
48
Example
Input/Output 2:
Input:
3 3
100 200 300
400 500 600
700 800 900
Output:
4000
Solution:
#include <iostream>
using namespace std;
int main(int argc, char** argv)
{
int
n,m,a,s=0;
cin>>n>>m;
for(int i=0;i<n;i++)
for(int j=0;j<m;j++){
cin>>a;
if(i==0||j==0||i==n-1||j==m-1)
s+=a;
}
cout<<s;
}