_高手帮帮解释下_int64是嘛意思
#include <stdio.h>void main()
{
int x,i;
__int64 a[51]={1,1,2};
for(i=3;i<51;i++)
{
a[i]=a[i-1]+a[i-2];
}
while(scanf("%d",&x)!=EOF)
{
printf("%I64d\n",a[x]);
}
}
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