HDU 5240 Exam

#include <stdio.h>
#include <stdlib.h>
#define MAX_EXAMS 100000

int numOfExams;
typedef struct Exam{
	int hoursBefore;
	int hoursLater;
	int hoursLast;
}Exam;
Exam ExamArray[MAX_EXAMS + 1];

int compare(Exam one, Exam another){
	if (one.hoursLater == another.hoursLater)
		return one.hoursLast - another.hoursLast;
	else
		return one.hoursLater - another.hoursLater;
}

int cmp(const void *a, const void *b){
	return compare( *(Exam *)a, *(Exam *)b );
}

int main(){

	int numOfTestCases;
	scanf("%d", &numOfTestCases);
	int testCase;
	for (testCase = 1; testCase <= numOfTestCases; testCase++){
		scanf("%d", &numOfExams);
		int exam;
		for (exam = 1; exam <= numOfExams; exam++)
			scanf("%d%d%d", &ExamArray[exam].hoursBefore, &ExamArray[exam].hoursLater, &ExamArray[exam].hoursLast);
		
		qsort(&ExamArray[1], numOfExams, sizeof(ExamArray[0]), cmp);

		printf("Case #%d: ", testCase);
		int pass = 1;
		int time = 0;
		for (exam = 1; exam <= numOfExams; exam++){
			time += ExamArray[exam].hoursBefore;
			if (time > ExamArray[exam].hoursLater){
				pass = 0;
				break;
			}
			time += ExamArray[exam].hoursLast;
		}
		if (pass)
			printf("YES\n");
		else
			printf("NO\n");
	}

	return 0;
}