View Compilation Error

0_0_36346654_5156.cpp: In function 'int main()':
0_0_36346654_5156.cpp:22:15: error: too few arguments to function 'long long int exgcd(long long int, long long int, long long int&, long long int&)'
   if(exgcd(a,b)==1){
               ^
0_0_36346654_5156.cpp:6:15: note: declared here
 long long int exgcd(long long int a,long long int b,long long int &x,long long int &y){
               ^
0_0_36346654_5156.cpp:25:7: error: 'm' was not declared in this scope
    x+=m;
       ^
0_0_36346654_5156.cpp:26:7: error: 'n' was not declared in this scope
    y-=n;
       ^