0_0_17071929_3971.cpp: In function 'int main()': 0_0_17071929_3971.cpp:10:31: error: 'memset' was not declared in this scope memset(dp,0,sizeof(dp)); ^ 0_0_17071929_3971.cpp:11:22: error: 'strlen' was not declared in this scope lena=strlen(a); ^