#include<stdio.h>
#include<math.h>
void trace_norm(int a[][10],int n,int *tr,float *norm){
    int i,j; *tr=0; *norm=0;
    for(i=0;i<n;i++)
        for(j=0;j<n;j++){
            if(i==j) *tr+=a[i][j];
            *norm+=a[i][j]*a[i][j];
        }
    *norm = sqrt(*norm);
}
void main(){
    int n,a[10][10],i,j,tr; float norm;
    printf("Enter size: ");
    scanf("%d",&n);
    for(i=0;i<n;i++) 
        for(j=0;j<n;j++) 
            scanf("%d",&a[i][j]);
    trace_norm(a,n,&tr,&norm);
    printf("Trace = %d\nNorm = %.2f",tr,norm);
}