Compilare: user.cpp: In function ‘void backt(int, int)’: user.cpp:51:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if (*it==root && sol.size()>nr_max) ^ user.cpp: In function ‘void citire()’: user.cpp:16:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:21:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&nod1,&nod2); ^ user.cpp: In function ‘int main()’: user.cpp:90:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("plimbare.in","r",stdin); ^ user.cpp:91:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("plimbare.out","w",stdout); ^