View Compilation Error

0_0_19379222_5976.cpp: In function 'int main()':
0_0_19379222_5976.cpp:15:27: error: 'memset' was not declared in this scope
     memset(a, 0, sizeof(a));
                           ^
0_0_19379222_5976.cpp:57:24: error: invalid types 'int[int]' for array subscript
    if( amount - d[d-1-j] > T)
                        ^