Compilare: main.cpp: In function 'll pow(ll, ll)': main.cpp:17:9: warning: 'a' may be used uninitialized in this function [-Wmaybe-uninitialized] return a; ^ main.cpp: In function 'int main()': main.cpp:14:7: warning: 'a' may be used uninitialized in this function [-Wmaybe-uninitialized] a=a*n%m; ~^~ main.cpp:11:5: note: 'a' was declared here ll a; ^