Compilare: user.cpp: In function ‘int valid()’: user.cpp:30:13: warning: unused variable ‘simetric_curent’ [-Wunused-variable] int i=1,simetric_curent; ^ user.cpp: In function ‘void backt(int)’: user.cpp:66:32: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(cp < cm || k==3 ||cp==cm&&N%2==0) ^ user.cpp:74:29: warning: unused variable ‘ok’ [-Wunused-variable] int ok; ^ user.cpp: In function ‘void citire()’: user.cpp:11:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&N,&K); ^ user.cpp: In function ‘int main()’: user.cpp:99:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bilete.in","r",stdin); ^ user.cpp:100:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bilete.out","w",stdout); ^