View Compilation Error

0_0_8876522_30309.cpp: In function `int check(int)':
0_0_8876522_30309.cpp:15: error: `retun' undeclared (first use this function)
0_0_8876522_30309.cpp:15: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_8876522_30309.cpp:15: error: expected `;' before "SG"