View Compilation Error

0_0_24034894_7634.cpp: In function 'int main()':
0_0_24034894_7634.cpp:9:25: error: 'memset' was not declared in this scope
     memset(a,0,sizeof(a));  
                         ^
0_0_24034894_7634.cpp:16:19: error: 'maxe' was not declared in this scope
        for(j=1;j<=maxe;j++)  
                   ^
0_0_24034894_7634.cpp:28:14: error: 'maxe' was not declared in this scope
        for(i=maxe;i>=1;i--) if(a[p][i])break;  
              ^