Compilare: user.cpp: In function ‘void solve()’: user.cpp:37:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<t[i].size();j++) ^ user.cpp: In function ‘void write()’: user.cpp:61:5: warning: ‘poz1’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(poz>poz1) swap(poz,poz1); ^ user.cpp:56:22: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(p==1) { cout<<poz<<"\n"; return; } ^