Compilare: user.cpp: In function ‘int main()’: user.cpp:34:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(love.a<v[1].size() && v[1][love.a].fi<=d) ^ user.cpp:36:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(love.b<v[2].size() && v[2][love.b].fi<=d) ^ user.cpp:38:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(love.c<v[3].size() && v[3][love.c].fi<=d) ^ user.cpp:40:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(love.d<v[4].size() && v[4][love.d].fi<=d) ^ user.cpp:42:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(love.a<v[1].size()) ^ user.cpp:50:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(love.b<v[2].size()) ^ user.cpp:58:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(love.c<v[3].size()) ^ user.cpp:66:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(love.d<v[4].size()) ^