#include<stdio.h>
#include<stdlib.h>int main()
{
int r,c;
scanf("%d%d",&r,&c);
int ma[r][c],i,j,s,t,g,a;
for(i=0;i<r;i++)
{
for(j=0;j<c;j++){
scanf("%d",&ma[i][j]);
}
}
for(i=0;i<r;i++)
{
for(j=0;j<c;j+=2)
{
s=ma[i][j];
t=ma[i][j+1];
g=s/10;
a=t/10;
ma[i][j]=g*10+t%10;
ma[i][j+1]=a*10+s%10;
printf("%d %d ",ma[i][j],ma[i][j+1]);
}
printf("\n");
}
}
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