Compilare: main.cpp: In function 'int main()': main.cpp:130:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(s[i-1].size()<l && j==s[i-1].size()) ~~~~~~~~~~~~~^~ main.cpp:130:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(s[i-1].size()<l && j==s[i-1].size()) ~^~~~~~~~~~~~~~~