zoj 2686 Cycle Game

#include<stdio.h>#include<math.h>int main(){int t;scanf("%d",&t);while(t--){int n,flag=0;scanf("%d",&n);int i,j,k,a[30],b[30];for(i=0;i<n;i++){scanf("%d",&a[i]);b[n-1-i]=a[i];}for(i=0;i<n;i++){if(a[i]==0){if(i%2){printf("YESn");flag=1;}break;}}if(flag==0){for(i=0;i<n;i++){if(b[i]==0){if(i%2){printf("YESn");flag=1;}break;}}}if(flag==0)printf("NOn");}return 0;}