Compilare: main.cpp: In function 'void dfs1(int, int)': main.cpp:23:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1,j=0;j<u.size();i+=(j<u.size()),j++) ~^~~~~~~~~ main.cpp:23:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1,j=0;j<u.size();i+=(j<u.size()),j++) ~^~~~~~~~~ main.cpp:24:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i>u[j]&&j<u.size()) ~^~~~~~~~~ main.cpp: In function 'void dfs2(int)': main.cpp:32:11: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if(it!=poz) ^ main.cpp:39:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1,j=0;j<u.size();i+=(j<u.size()),j++) ~^~~~~~~~~ main.cpp:39:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1,j=0;j<u.size();i+=(j<u.size()),j++) ~^~~~~~~~~ main.cpp:40:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i>u[j]&&j<u.size()) ~^~~~~~~~~ main.cpp:47:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1,j=0;j<u.size();i+=(j<u.size()),j++) ~^~~~~~~~~ main.cpp:47:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1,j=0;j<u.size();i+=(j<u.size()),j++) ~^~~~~~~~~ main.cpp:48:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i>u[j]&&j<u.size()) ~^~~~~~~~~