Compilare: main.cpp: In function 'void pre_suf()': main.cpp:24:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<strlen(pattern);++i) ~^~~~~~~~~~~~~~~~ main.cpp: In function 'void solution()': main.cpp:55:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<strlen(sir);++i) ~^~~~~~~~~~~~