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Diagonal Difference Hackerrank Solution in C

#include<stdio.h>
int main()
{
int a[1000][1000],n,i,j,s1=0,s2=0,t;
scanf("%d",&n);
t=n;
for(i=1;i<=n;i++)
{
for(j=1;j<=n;j++)
{
scanf("%d",&a[i][j]);
}
}
for(i=1;i<=n;i++)
{
for(j=1;j<=n;j++)
{
if(i==j)
{
s1=s1+a[i][j];
}
}
}
for(i=1;i<=t;i++)
{
for(j=n;j>=1;j--)
{
s2=s2+a[i][j];
n--;
break;
}
}
if(s1>s2)
{
printf("%d",s1-s2);
}
else
{
printf("%d",s2-s1);
}
return 0;
}

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