foo.cpp: In function 'int main()':
foo.cpp:12:7: error: incompatible types in assignment of 'int' to 'int [101]'
  dp[0]=1;
       ^
foo.cpp:16:24: error: invalid operands of types 'int [101]' and 'int [101]' to binary 'operator+'
     dp[j]=(dp[j-k]+dp[j])%1000007;
                        ^