Compilare: user.cpp: In function ‘void buildZArray()’: user.cpp:18:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < zString.size(); ++i) { ~~^~~~~~~~~~~~~~~~ user.cpp:23:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i + count < zString.size() && zString[count] == zString[i + count]) { ~~~~~~~~~~^~~~~~~~~~~~~~~~ user.cpp:42:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (R + count + 1 < zString.size() && zString[Z[k] + count] == zString[R + count + 1]) { ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~ user.cpp:51:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (Z[i] == pattern.size()) { user.cpp: In function ‘int main()’: user.cpp:70:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < zString.size(); ++i) { ~~^~~~~~~~~~~~~~~~ user.cpp:71:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (Z[i] == pattern.size()) {