0_0_18686142_771.cpp: In function 'void Ins(char*)':
0_0_18686142_771.cpp:29:24: error: 'strlen' was not declared in this scope
for(int i=0;i<strlen(s);++i)
^
0_0_18686142_771.cpp: In function 'int Ans()':
0_0_18686142_771.cpp:74:14: error: 'strlen' was not declared in this scope
len=strlen(s);
^
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