Compilare: user.cpp:44:0: warning: "INFOARENA" redefined [enabled by default] #define INFOARENA ^ <command-line>:0:0: note: this is the location of the previous definition user.cpp: In function ‘void solve()’: user.cpp:89:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d", &N, &Q); ^ user.cpp:91:49: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d %d %d", &x, &y, &lat, &val); ^ user.cpp: In function ‘int main()’: user.cpp:118:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &T); ^