View Compilation Error

0_0_31339232_31031.cpp: In function 'int main()':
0_0_31339232_31031.cpp:79:23: error: expected '}' at end of input
             vis[pre]=1;
                       ^
0_0_31339232_31031.cpp:79:23: error: expected '}' at end of input
0_0_31339232_31031.cpp:79:23: error: expected '}' at end of input