View Compilation Error

0_0_9568700_20783.cpp: In function `void set_dfs(int)':
0_0_9568700_20783.cpp:28: error: expected primary-expression before '%' token
0_0_9568700_20783.cpp:28: error: expected primary-expression at end of input
0_0_9568700_20783.cpp:28: error: expected `;' at end of input
0_0_9568700_20783.cpp:28: error: expected `}' at end of input