Compilare: main.cpp: In function 'void precalc()': main.cpp:33:17: warning: unused variable 'st' [-Wunused-variable] int st=0,dr=(int)log2(min(n-i+1,m-j+1)),act=0; ^~ main.cpp:33:22: warning: unused variable 'dr' [-Wunused-variable] int st=0,dr=(int)log2(min(n-i+1,m-j+1)),act=0; ^~ main.cpp:35:17: warning: variable 'sol' set but not used [-Wunused-but-set-variable] int sol=2e9; ^~~