Compilare: user.cpp: In function ‘void backtracking(int)’: user.cpp:17:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < surse[x].size(); i++) ^ user.cpp: In function ‘void rez(int, int)’: user.cpp:38:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < s[x].size(); i++) ^ user.cpp:54:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < s[b].size(); i++) ^ user.cpp:30:9: warning: unused variable ‘j’ [-Wunused-variable] int i, j,a,b,c; ^ user.cpp: In function ‘int main()’: user.cpp:96:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < rezultatprim.size(); i++) ^ user.cpp:98:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; j < rezultat.size(); j++) ^