Compilare: main.cpp: In function 'void KMP()': main.cpp:15:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<P.size(); ++i){ ~^~~~~~~~~ main.cpp:17:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(; i<P.size() and S[i-i2]==S[i];) ~^~~~~~~~~ main.cpp:18:18: warning: operation on 'i' may be undefined [-Wsequence-point] lps[i++]=i-i2; ~^~ main.cpp:27:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<S.size(); ++i){ ~^~~~~~~~~ main.cpp:30:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=i; j<S.size() and S[j]==P[len];++len) ~^~~~~~~~~ main.cpp:34:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(len==P.size()) ~~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:45:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<poz.size(); ++i) ~^~~~~~~~~~~