View Compilation Error

0_0_39403844_1016.cpp: In function 'bool SPFA()':
0_0_39403844_1016.cpp:25:24: error: 'n' was not declared in this scope
   25 |         for(int i=0;i<=n;i++){
      |                        ^
0_0_39403844_1016.cpp:34:29: error: 'n' was not declared in this scope
   34 |                 if(++out[u]>n) return false;
      |                             ^
0_0_39403844_1016.cpp: In function 'int main()':
0_0_39403844_1016.cpp:65:25: error: too many arguments to function 'bool SPFA()'
   65 |                 if(!SPFA(n)){
      |                     ~~~~^~~
0_0_39403844_1016.cpp:24:6: note: declared here
   24 | bool SPFA(){
      |      ^~~~