Compilare: main.cpp: In function 'int main()': main.cpp:15:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<s.size();i++) ~^~~~~~~~~ main.cpp:19:20: warning: suggest parentheses around '&&' within '||' [-Wparentheses] while(s[i]>='A'&&s[i]<='Z'||(s[i]>='0'&&s[i]<='9')) main.cpp:27:24: warning: suggest parentheses around '&&' within '||' [-Wparentheses] while(s[i]>='a'&&s[i]<='z'||(s[i]>='0'&&s[i]<='9')) main.cpp:47:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<sol.size();i++) ~^~~~~~~~~~~ main.cpp:49:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<sol[i].size();j++) ~^~~~~~~~~~~~~~