View Compilation Error

0_0_36193258_22449.cpp:28:11: error: '::main' must return 'int'
 void main(){
           ^
0_0_36193258_22449.cpp: In function 'int main()':
0_0_36193258_22449.cpp:43:40: error: 'memset' was not declared in this scope
         memset(bs,true,sizeof(bool)*100);
                                        ^