#include<stdio.h>

long n,b,i,j,y,min,mini,bb;

long a[300][300];

int main()



{

freopen("grozavesti.in","r",stdin);
freopen("grozavesti.out","w",stdout);

scanf("%ld",&n);

for (i=1;i<=n;i++)
for (j=1;j<=n;j++)

scanf("%ld", &a[i][j]);

for (i=1;i<=n;i++)

if (a[i][i]<=a[i+1][i+1])

b++;




if (b==n-1)

printf("0");

else

{

min=a[1][1];
mini=1;

for (i=2;i<=n;i++)

if (a[1][i]<min)

{

min=a[i][i];

mini=i;


}


if (mini!=1)

{

y=1;


for (i=1;i<=n;i++)


if (a[i][i]<=a[i+1][i+1]) bb++;

if (bb==n-2)   printf("1\n");

printf("C 1 %d" ,mini);



}




}










return 0;

}