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无语!!0ms瞬过!!!附代码!!#include<stdio.h>
int main()
{
long long n,m,a,s,d[55];
while(~scanf("%lld",&n))
{
for(m=1;m<=n;m++)
scanf("%lld",&d[m]);
int i;
int s=d[1];
for(i=2;i<=n;i++)
s^=d[i];
if(s!=0) printf("Yes\n");
else printf("No\n");
}
}
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