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原题链接

#include 
  
   

int main(){
	int n, a, b, t;
	while(scanf("%d", &n) == 1){
		a = b = 0;
		while(n-- && scanf("%d", &t))
			if(t & 1) ++b;
			else ++a;
		printf("%d\n", b & 1   b : a);
	}
	return 0;
}