View Compilation Error

0_0_9978235_14998.cpp: In function `int chuli(long unsigned int, long unsigned int, long unsigned int)':
0_0_9978235_14998.cpp:19: error: `nI' undeclared (first use this function)
0_0_9978235_14998.cpp:19: error: (Each undeclared identifier is reported only once for each function it appears in.)