Eroare de compilare: main.cpp: In function 'int main()': main.cpp:29:16: warning: suggest parentheses around '-' inside '<<' [-Wparentheses] n-=(1ll<<nr-1); ~~^~ main.cpp:34:13: error: expected ';' before 'sum' i--;4 sum-=1ll<<(nr-i-1); ^~~ main.cpp:34:31: warning: statement has no effect [-Wunused-value] i--;4 sum-=1ll<<(nr-i-1); ^ main.cpp:37:7: error: 'c' was not declared in this scope c-=i; ^ main.cpp:26:17: warning: unused variable 'aux' [-Wunused-variable] int nr=1, aux=0, k=0; ^~~ Non zero exit status: 1