Compilare: user.cpp: In function ‘void solve(int, int)’: user.cpp:104:7: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(nod>1) ^ user.cpp: In function ‘int main()’: user.cpp:131:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("invtree.in","r",stdin); ^ user.cpp:132:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("invtree.out","w",stdout); ^ user.cpp:134:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&n,&H); ^ user.cpp:137:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d",&x,&y,&z); ^