ACM Normal and Trace

Problem Link: http://acm.epoka.edu.al:8888/en/problem-pid-c797?ps=1&smt=9&smpwid=0

#include <bits/stdc++.h>
using namespace std;

int main()
{
    int n,r,c,a[505][505],i,j,trace=0;
    double sum=0.00,normal;
    //freopen("input.txt","r",stdin);
    //freopen("output.txt","w",stdout);
    scanf("%d",&n);
    for(i=0;i<n;i++)
    {
        for(j=0;j<n;j++)
        {
            scanf("%d",&a[i][j]);
            sum=sum+a[i][j]*a[i][j];
            if(i==j)
            {
                trace=trace+a[i][j];
            }

        }
    }

    normal=sqrt(sum);
    printf("%0.2f %d\n",normal,trace);

    return 0;



}

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