Compilare: user.cpp: In function ‘std::pair<int, int> querry(int, int)’: user.cpp:39:14: warning: unused variable ‘sol2’ [-Wunused-variable] int sol1,sol2,sol12,sol22; ^ user.cpp:39:25: warning: unused variable ‘sol22’ [-Wunused-variable] int sol1,sol2,sol12,sol22; ^ user.cpp: In function ‘int main()’: user.cpp:96:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("potriveala.in.in","r",stdin); ^ user.cpp:97:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("potriveala.out","w",stdout); ^ user.cpp:99:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",r1+1); ^ user.cpp:100:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",r2+1); ^