Compilare: main.cpp: In function 'void preprocess()': main.cpp:28:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j<pattern.length()){ ~^~~~~~~~~~~~~~~~~ main.cpp: In function 'void kmp()': main.cpp:49:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j<text.length()){ ~^~~~~~~~~~~~~~ main.cpp:56:7: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i==pattern.length()){ ~^~~~~~~~~~~~~~~~~~