Compilare: main.cpp: In function 'int solve1(int, int)': main.cpp:16:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | if(pa!=v[a].size() && ( pb==v[b].size() || v[a][pa]<=v[b][pb]))nw=v[a][pa],pa++,ns=0; | ~~^~~~~~~~~~~~~ main.cpp:16:43: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | if(pa!=v[a].size() && ( pb==v[b].size() || v[a][pa]<=v[b][pb]))nw=v[a][pa],pa++,ns=0; | ~~^~~~~~~~~~~~~ main.cpp: In function 'int sovle2(int, int)': main.cpp:54:16: warning: 'sol' may be used uninitialized [-Wmaybe-uninitialized] 54 | return sol; | ^~~ main.cpp:47:27: note: 'sol' was declared here 47 | int st=lin,dr=lax,sol; | ^~~