Compilare: main.cpp: In function 'int main()': main.cpp:19:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=1;i<s3.size();i++) ~^~~~~~~~~~ main.cpp:25:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i+z[i]<s3.size()&&s3[z[i]]==s3[i+z[i]]) ~~~~~~^~~~~~~~~~ main.cpp:39:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=1;i<s3.size();i++) ~^~~~~~~~~~ main.cpp:45:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i+z1[i]<s3.size()&&s3[z1[i]]==s3[i+z1[i]]) ~~~~~~~^~~~~~~~~~ main.cpp:56:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=s1.size()+1;i<s3.size();i++) ~^~~~~~~~~~