0_0_36282868_9299.cpp: In function 'int inv(ll, ll)':
0_0_36282868_9299.cpp:47:15: error: invalid initialization of reference of type 'int&' from expression of type 'll {aka long long int}'
exgcd(a,b,x,y);
^
0_0_36282868_9299.cpp:33:6: note: in passing argument 3 of 'void exgcd(int, int, int&, int&)'
void exgcd(int a,int b,int &x,int &y) //À©Å·
^
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