View Compilation Error

0_0_26621967_24836.cpp: In function 'void cal()':
0_0_26621967_24836.cpp:12:32: error: 'memset' was not declared in this scope
         memset(sum,0,sizeof sum);
                                ^
0_0_26621967_24836.cpp: In function 'void solve()':
0_0_26621967_24836.cpp:39:28: error: 'memset' was not declared in this scope
     memset(bag,0,sizeof bag);
                            ^