Problem 6

#include<stdio.h>
int main()
{
    int a,b,c;
    scanf("%d %d %d", &a, &b, &c);
    if((a+b)>c && (b+c)>a && (c+a)>b)
        printf("Tri-angle");
    else
        printf("Can not form a Tri-angle");
    return 0;
}