Compilare: user.cpp: In function ‘void run_rmq()’: user.cpp:54:13: warning: unused variable ‘prev_p2’ [-Wunused-variable] int prev_p2 = (1 << (i - 1)); ^ user.cpp: In function ‘void read_and_solve()’: user.cpp:110:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^ user.cpp:115:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &x, &y); ^ user.cpp:127:41: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &cost, &x, &y); ^ user.cpp: In function ‘int main()’: user.cpp:143:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("paznici3.in","r",stdin); ^ user.cpp:144:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("paznici3.out","w",stdout); ^