题解 | 小红取数

#include <stdio.h>

int main() {
	int n = 0;
	scanf("%d", &n);
	int odd_number = 0;
	int number = 0;
	for (int i = 0; i < n; i++) {
		scanf("%d", &number);
		if (number % 2) {
			odd_number++;
		}
	}
	if (odd_number) {
		printf("%d", odd_number);
	}
	else {
		printf("-1");
	}
	return 0;
}