View Compilation Error

0_0_18472580_31907.cpp: In function 'int cacl(int)':
0_0_18472580_31907.cpp:71:30: error: invalid operands of types 'int' and 'int [2]' to binary 'operator*'
         res+=num[i]*dp[i-1][0];
                              ^
0_0_18472580_31907.cpp:73:34: error: invalid operands of types 'int' and 'int [2]' to binary 'operator*'
             res-=num[i]*dp[i-1][0];
                                  ^