Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:65:12: warning: unused variable ‘u’ [-Wunused-variable] int p, u; ^ user.cpp: In function ‘void RMQ()’: user.cpp:82:9: warning: unused variable ‘p’ [-Wunused-variable] int p, p2; ^ user.cpp:82:12: warning: unused variable ‘p2’ [-Wunused-variable] int p, p2; ^ user.cpp: In function ‘void readFile()’: user.cpp:39:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d", &n, &q); ^ user.cpp:45:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &nr); ^ user.cpp: In function ‘void ansQues()’: user.cpp:144:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d", &a, &b); ^