View Compilation Error

0_0_18735227_6502.cpp: In function 'int main()':
0_0_18735227_6502.cpp:28:11: error: 'inf' was not declared in this scope
    dp[0]=-inf,len=0;
           ^
0_0_18735227_6502.cpp:40:5: error: 'cnt' was not declared in this scope
     cnt=1;
     ^
0_0_18735227_6502.cpp:41:27: error: 'cnt' was not declared in this scope
    } else if(len==maxlen) cnt++;
                           ^
0_0_18735227_6502.cpp:44:28: error: 'cnt' was not declared in this scope
   printf("%d\n%d\n",maxlen,cnt);
                            ^