Compilare: main.cpp: In function 'void zalgorithm()': main.cpp:40:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < z.size(); ++i) { ~~^~~~~~~~~~ main.cpp:43:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i+zarray[i] < z.size() and z[i+zarray[i]] == z[zarray[i]]) ~~~~~~~~~~~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:77:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 1; i < z.size(); ++i) ~~^~~~~~~~~~ main.cpp:84:30: warning: left operand of comma operator has no effect [-Wunused-value] int ans = (out2[i] - in2[i]+1,zarray[in2[i]]); ~~~~~~~~~~~~~~~~^~