View Compilation Error

0_0_33379505_12517.cpp: In function 'int main()':
0_0_33379505_12517.cpp:20:5: error: 'h' was not declared in this scope
     h[sum]++;
     ^
0_0_33379505_12517.cpp:37:9: error: 'h' was not declared in this scope
      if(h[sum])
         ^