Compilare: user.cpp: In function ‘int main()’: user.cpp:28:18: warning: unused variable ‘j’ [-Wunused-variable] int n, m, i, j, x, y; ^ user.cpp: In function ‘void computeRMQ()’: user.cpp:65:15: warning: unused variable ‘k’ [-Wunused-variable] int i, j, k, p, x, y; ^ user.cpp: In function ‘void computeLCA(int, int)’: user.cpp:86:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < v[ nod ].size(); ++i ){ ^ user.cpp: In function ‘int main()’: user.cpp:25:32: 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:26:34: 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:30:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:32:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^ user.cpp:40:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^