0_0_28868810_16196.cpp: In function 'int main()':
0_0_28868810_16196.cpp:59:35: error: 'memset' was not declared in this scope
memset(book,0,sizeof(book));
^
0_0_28868810_16196.cpp:61:23: error: 'strlen' was not declared in this scope
len = strlen(s);
^
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