View Compilation Error

0_0_37054189_2399.cpp: In function 'long long int getval(long long int, long long int)':
0_0_37054189_2399.cpp:13:43: error: 'c' was not declared in this scope
  return dp[j]+(s[i]-s[j+1])*(s[i]-s[j+1])+c;
                                           ^