Compilare: main.cpp: In function 'void zalgorithm()': main.cpp:41:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (long long i = 1; i < z.size(); ++i) { ~~^~~~~~~~~~ main.cpp:44:21: 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:78:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( long long i = 1; i < z.size(); ++i) ~~^~~~~~~~~~ main.cpp:85:34: warning: left operand of comma operator has no effect [-Wunused-value] long long ans = (out[i] - in[i]+1,zarray[in[i]]); ~~~~~~~~~~~~~~^~