Small Triangles, Large Triangles C

Problem Statement :

You are given n triangles, specifically, their sides  a(i), b(i) and c(i) . Print them in the same style but sorted by their areas from the smallest one to the largest one. It is guaranteed that all the areas are different.

Input Format

First line of each test file contains a single integer n. n  lines follow with , a(i), b(i) and c(i) on each separated by single spaces.


    1 <=  n   <=  100
    1 <=   a(i), b(i), c(i)  <= 70
    a(i) + b(i) > c(i) a(i) + c(i) >  b(i) and  b(i) + c(i) > a(i) .

Output Format

Print exactly n lines. On each line print 3 integers separated by single spaces, which are a(i), b(i)  and c(i) of the corresponding triangle.

Solution :


                            Solution in C :

#include <stdio.h>
#include <stdlib.h>

struct Triangle
   int a, b, c;

int square(struct Triangle t)
    int a = t.a, b = t.b, c = t.c;
    return (a + b + c)*(a + b - c)*(a - b + c)*(-a + b + c);

void sort_by_square(struct Triangle* a, int n)
    for (int i = 0; i < n; i++)
        for (int j = i + 1; j < n; j++)
            if (square(a[i]) > square(a[j]))
                struct Triangle temp = a[i];
                a[i] = a[j];
                a[j] = temp;

int main()
   int n;
   scanf("%d", &n);
   struct Triangle *a = calloc(n, sizeof(struct Triangle));
   for (int i = 0; i < n; i++)
      scanf("%d%d%d", &a[i].a, &a[i].b, &a[i].c);
   sort_by_square(a, n);
   for (int i = 0; i < n; i++)
      printf("%d %d %d\n", a[i].a, a[i].b, a[i].c);
   return 0;

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