Compilare: user.cpp: In function ‘void zet()’: user.cpp:14:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<b.size();i++){ ^ user.cpp:21:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i+pi[i]<b.size() &&pi[i]<b.size() &&b[i+pi[i]]==b[pi[i]]) ^ user.cpp:21:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i+pi[i]<b.size() &&pi[i]<b.size() &&b[i+pi[i]]==b[pi[i]]) ^ user.cpp:27:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(z[0]<b.size() &&a[z[0]]==b[z[0]]) z[0]++; ^ user.cpp:30:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<a.size();i++){ ^ user.cpp:37:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i+z[i]<a.size() &&z[i]<b.size() &&a[i+z[i]]==b[z[i]]) ^ user.cpp:37:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i+z[i]<a.size() &&z[i]<b.size() &&a[i+z[i]]==b[z[i]]) ^ user.cpp: In function ‘int main()’: user.cpp:60:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<a.size();i++) ^ user.cpp:63:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] ans+=(b.size()-(z[i]!=b.size() &&a[i+z[i]]>b[z[i]])); ^