Compilare: user.cpp: In function ‘void buildrmq()’: user.cpp:25:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<=eulerList.size(); i++) ~^~~~~~~~~~~~~~~~~~ user.cpp:28:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=1; j+(1<<(i-1))<=eulerList.size(); j++) ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:50:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<eulerList.size(); i++) ~^~~~~~~~~~~~~~~~~ user.cpp:38:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("lca.in","r",stdin); ^ user.cpp:39:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("lca.out","w",stdout); ^ user.cpp:40:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:44:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&tata); ^ user.cpp:58:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&st,&dr); ^