View Compilation Error

0_0_29913694_13167.cpp: In function 'int SPFA(int)':
0_0_29913694_13167.cpp:28:12: error: 'u' was not declared in this scope
     if(num[u]==n+2)
            ^
0_0_29913694_13167.cpp:29:9: error: continue statement not within a loop
         continue;
         ^
0_0_29913694_13167.cpp:30:12: error: 'u' was not declared in this scope
     if(num[u]==n+1)
            ^