0_0_23820091_8563.cpp: In function 'int main()':
0_0_23820091_8563.cpp:31:10: error: 'f' was not declared in this scope
while(!f[n][k--]); //排除前面为空的数组
^
0_0_23820091_8563.cpp:32:16: error: 'f' was not declared in this scope
printf("%d", f[n][k + 1]); //输出结果的前四位
^
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