text: #include <stdio.h>
  
  int main(void) {
    double x,y;
    printf("x:");
    scanf("%lf",&x);
    printf("y:");
    scanf("%lf",&y);
    if(x>=0 && y>=0){
      if(y<=((-0.5*x)+100)){
      printf("The point is in the triangle.\n");
      return 0;
      }
    }
    printf("The point is not in the triangle.\n");
    return 0;
  }