Compilare: main.cpp: In function 'int main()': main.cpp:126:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<pct>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 126 | for(i=0;i<sol.size();i++)g<<sol[i].x<<' '<<sol[i].y<<'\n'; | ~^~~~~~~~~~~ main.cpp:49:11: warning: unused variable 'j' [-Wunused-variable] 49 | int i,j,x,y,z,t,range; | ^ main.cpp:98:29: warning: 'ysol' may be used uninitialized [-Wmaybe-uninitialized] 98 | g<<xsol<<' '<<ysol<<' '<<mn-1; | ^~~ main.cpp:68:15: note: 'ysol' was declared here 68 | int xsol,ysol,mn=40000; | ^~~~ main.cpp:98:18: warning: 'xsol' may be used uninitialized [-Wmaybe-uninitialized] 98 | g<<xsol<<' '<<ysol<<' '<<mn-1; | ^~~ main.cpp:68:10: note: 'xsol' was declared here 68 | int xsol,ysol,mn=40000; | ^~~~