View Compilation Error

0_0_22434443_10732.cpp: In function 'void dfsdis(int, int, int)':
0_0_22434443_10732.cpp:141:8: error: 'cnt' was not declared in this scope
     ff[cnt++]=u;
        ^
0_0_22434443_10732.cpp: In function 'void calc(int, int)':
0_0_22434443_10732.cpp:152:5: error: 'cnt' was not declared in this scope
     cnt=0;
     ^