Compilare: main.cpp: In function 'void computeprefix()': main.cpp:12:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int q=1; q<a.length(); q++){ ~^~~~~~~~~~~ main.cpp: In function 'int kmp()': main.cpp:27:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<b.length(); i++){ ~^~~~~~~~~~~ main.cpp:32:5: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(q==a.length()){n++;q=pi[q]; if(n<=1000){c+=to_string(i-a.length()+1)+' '; i+=q-a.length()+1;}} ~^~~~~~~~~~~~