If the triangle is valid or not

#include<stdio.h>
int main()
{
    int x,y,z,sum;
    printf("Enter the angles of the triangle:\n");
    scanf("%d%d%d", &x, &y, &z);
    sum=x+y+z;
    if(sum==180 && x!=0 && y!=0 && z!= 0)
    {
        printf("Triangle is valid.");
    }
    else
    {
        printf("Triangle is not valid.");
    }
    return 0;
}