Compilare: main.cpp: In function 'int main()': main.cpp:31:33: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 31 | for(int j = 1; j<strlen(s); j++) | ~^~~~~~~~~~ main.cpp:22:19: warning: unused variable 'tmp' [-Wunused-variable] 22 | int n, k, tmp; // nr de useri, nr de verificari, numarul userului verificat, numarul luat iterativ la verificat dupa numarul userului online | ^~~