Compilare: main.cpp: In function 'void Add()': main.cpp:39:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<ctc.size();++i) sol[++sol[0]]=ctc[i]; ~^~~~~~~~~~~ main.cpp: In function 'void Solve()': main.cpp:66:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(sol[0]<ctc.size())Add(); ~~~~~~^~~~~~~~~~~ main.cpp:54:16: warning: unused variable 'o' [-Wunused-variable] int i,Node,o,w; ^ main.cpp:54:18: warning: unused variable 'w' [-Wunused-variable] int i,Node,o,w; ^ main.cpp: In function 'void Read()': main.cpp:16:22: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&N); ^ main.cpp:19:32: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&X,&Y); ^