Compilare: main.cpp: In function 'void dfs(int)': main.cpp:9:9: warning: unused variable 'j' [-Wunused-variable] int j; ^ main.cpp: In function 'int main()': main.cpp:55:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(x=0;x<component[i].size() && !e;x++) ~^~~~~~~~~~~~~~~~~~~~ main.cpp:56:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(y=0;y<component[j].size() && !e;y++){ ~^~~~~~~~~~~~~~~~~~~~ main.cpp:25:27: warning: unused variable 'ok' [-Wunused-variable] int m,i,a,b,nr1,total,ok,k,muchii,lst,j,e,x,y; ^~ main.cpp:28:29: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&n,&m); ^ main.cpp:30:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&a,&b); ^