Compilare: main.cpp: In function 'int main()': main.cpp:34:23: warning: variable 'mnxp' set but not used [-Wunused-but-set-variable] int mnx=-1,mny=-1,mnxp,mnyp; ^~~~ main.cpp:34:28: warning: variable 'mnyp' set but not used [-Wunused-but-set-variable] int mnx=-1,mny=-1,mnxp,mnyp; ^~~~ main.cpp:18:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("tribute.in","r",stdin); ^ main.cpp:19:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("tribute.out","w",stdout); ^ main.cpp:47:16: warning: iteration 50001 invokes undefined behavior [-Waggressive-loop-optimizations] r-=py[i]; ~~~~^ main.cpp:45:18: note: within this loop for(int i=0;i<=50001;i++) ~^~~~~~~ main.cpp:39:16: warning: iteration 50001 invokes undefined behavior [-Waggressive-loop-optimizations] r-=px[i]; ~~~~^ main.cpp:37:18: note: within this loop for(int i=0;i<=50001;i++) ~^~~~~~~