Runtime Error "NZEC" on Problem "Vaccine Production" (C Language)

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Hello, Guys, :grinning:

I am trying to solve this beginner problem using C language:
https://www.codechef.com/problems/VACCINE1

Would you please give me a hint of what can be wrong with the code below? I am getting the runtime error “NZEC”.

I was suspecting it was a problem with the enum so I replaced it with an in variable, but the problem did not go away.

Here is the solution code in CodeChef page (if you prefer to view like that):
https://www.codechef.com/viewsolution/40469687

Here is my code:

#include <stdio.h>

void main(void)
{
	enum productionStatus {
		CompanyA,
		CompanyB,
		BothCompanies
	} companyProducing;

	short int D1, V1, D2, V2, P, d = 0, day = 0, dayProductionStarts = 0, vaccineNo = 0;
    scanf("%hd %hd %hd %hd %hd", &D1, &V1, &D2, &V2, &P);

	if (D1 < D2) {
		companyProducing = CompanyA;
		day = D1;
	} else if (D1 > D2) {
		companyProducing = CompanyB;
		day = D2;
	} else {
		companyProducing = BothCompanies;
		day = D1;
	}

	if (companyProducing == CompanyA) {
		while (1) {
			vaccineNo += V1;
			if (vaccineNo >= P) {
				d = day;
				break;
			}
			if (day == D2) {
				companyProducing = BothCompanies;
				break;
			}
			day++;
		}
	}

	if (companyProducing == CompanyB) {
		while (1) {
			vaccineNo += V2;
			if (vaccineNo >= P) {
				d = day;
				break;
			}
			if (day == D1) {
				companyProducing = BothCompanies;
				break;
			}
			day++;
		}
	}

	if (companyProducing == BothCompanies) {
		while (1) {
			vaccineNo += (V1 + V2);
			if (vaccineNo >= P) {
				d = day;
				break;
			}
			day++;
		}
	}

	printf("%hd\n", d);
}

I found out the issue:
NZEC stands for Non Zero Exit Code. For C users, this will be generated if your main method does not have a return 0; statement. Other languages like Java/C++ could generate this error if they throw an exception.

Needs to change “void main()” to “int main()” and “return 0” at the end.

How do I mark this post as resolved?