View Compilation Error

0_0_37943564_9545.cpp: In function 'int f(int)':
0_0_37943564_9545.cpp:12:27: error: 'memset' was not declared in this scope
     memset(dp,0,sizeof(dp));
                           ^
0_0_37943564_9545.cpp: In function 'int main()':
0_0_37943564_9545.cpp:47:25: error: 'memset' was not declared in this scope
     memset(v,0,sizeof(v));
                         ^