Submission #1221911

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Source Code Expand

#include <stdio.h>

enum State { FIRST, INCREASE, DECREASE };

int main(void) {
	int N, i, A[2], count = 1, state = FIRST;

	scanf("%d", &N);
	scanf("%d", &A[0]);
	for (i = 0; i < N - 1; i++) {
		scanf("%d", &A[1]);
		switch (state) {
		case FIRST:
			if (A[0] < A[1])
				state = INCREASE;
			else if (A[0] > A[1])
				state = DECREASE;
			break;

		case INCREASE:
			if (A[0] > A[1]) {
				state = FIRST;
				count++;
			}
			break;

		case DECREASE:
			if (A[0] < A[1]) {
				state = FIRST;
				count++;
			}
			break;
		}
		A[0] = A[1];
	}

	printf("%d\n", count);
	return 0;
}

Submission Info

Compile Error

./Main.c: In function ‘main’:
./Main.c:8:2: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &N);
  ^
./Main.c:9:2: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &A[0]);
  ^
./Main.c:11:3: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &A[1]);
   ^

Judge Result