Compilare: user.cpp: In function ‘int main()’: user.cpp:55:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<S1[k].size();i++) ^ user.cpp:57:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;j<S2[k].size()-1;j++) if(modul(S1[k][i].x-S2[k][j+1].x)>=modul(S1[k][i].x-S2[k][j].x)) break; ^ user.cpp:66:25: warning: ‘p2’ may be used uninitialized in this function [-Wmaybe-uninitialized] sol2[k]=S2[k][p2].y; ^ user.cpp:65:25: warning: ‘p1’ may be used uninitialized in this function [-Wmaybe-uninitialized] sol1[k]=S1[k][p1].y; ^