View Compilation Error

0_0_18089356_15871.cpp: In function 'int dp()':
0_0_18089356_15871.cpp:15:17: error: expected primary-expression at end of input
     if (ch[i][j]=
                 ^
0_0_18089356_15871.cpp:15:17: error: expected ')' at end of input
0_0_18089356_15871.cpp:15:17: error: expected statement at end of input
0_0_18089356_15871.cpp:15:17: error: expected '}' at end of input