#include<stdio.h>
#define N 5
#include<math.h>
void main()
{
struct comp
{
float x;
float y;
float m;
}; struct comp a[N];
int i, k;
float max;
for (i = 0; i < N; i++)
{
scanf_s("%f%f", &a[i].x, &a[i].y);
a[i].m = sqrt(a[i].x*a[i].x + a[i].y*a[i].y);
}
max = a[0].m;
for (i = 1; i < N; i++)
{
if (a[i].m > max)max = a[i].m; k = i;
}
printf("max=%.1f+%.1fi\n", a[k].x, a[k].y);
}