Compilare: main.cpp: In function 'int main()': main.cpp:21:9: warning: unused variable 'cer' [-Wunused-variable] int cer,n,m,i,j=0,mn=1000000000,mx=0,mnmx=0,af,bf,id,jd,is,js; ^~~ main.cpp:21:37: warning: unused variable 'mx' [-Wunused-variable] int cer,n,m,i,j=0,mn=1000000000,mx=0,mnmx=0,af,bf,id,jd,is,js; ^~ main.cpp:21:42: warning: unused variable 'mnmx' [-Wunused-variable] int cer,n,m,i,j=0,mn=1000000000,mx=0,mnmx=0,af,bf,id,jd,is,js; ^~~~ main.cpp:61:11: warning: 'js' may be used uninitialized in this function [-Wmaybe-uninitialized] q.push({is,js,1}); ~~~~~~^~~~~~~~~~~ main.cpp:61:11: warning: 'is' may be used uninitialized in this function [-Wmaybe-uninitialized] main.cpp:43:20: warning: 'jd' may be used uninitialized in this function [-Wmaybe-uninitialized] dstdelf[id][jd]=0; ~~~~~~~~~~~~~~~^~ main.cpp:43:20: warning: 'id' may be used uninitialized in this function [-Wmaybe-uninitialized] main.cpp:78:22: warning: 'bf' may be used uninitialized in this function [-Wmaybe-uninitialized] if(x==af && y==bf) ~^~~~ main.cpp:78:13: warning: 'af' may be used uninitialized in this function [-Wmaybe-uninitialized] if(x==af && y==bf) ~^~~~