Compilare: main.cpp: In member function 'int Coupling::pairup(int)': main.cpp:21:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int h = 0 ; h < g[node].size() ; h++){ ~~^~~~~~~~~~~~~~~~ main.cpp: In member function 'int Coupling::maxflow()': main.cpp:57:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < used.size() ; i++) ~~^~~~~~~~~~~~~ main.cpp: In function 'void computedp(int, int, int, int)': main.cpp:95:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < g[x].size() ; i++) ~~^~~~~~~~~~~~~ main.cpp:96:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0 ;j < g2[y].size() ; j++) { ~~^~~~~~~~~~~~~~ main.cpp:106:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(graph.maxflow() == g2[y].size() - (y != 0)) ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~