Compilare: main.cpp: In function 'int main()': main.cpp:123:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0, j = 0; i < elemente.size(); i++) ~~^~~~~~~~~~~~~~~~~ main.cpp:125:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (j < elemente.size() && elemente[j].val >= elemente[i].val - d) ~~^~~~~~~~~~~~~~~~~ main.cpp:107:7: warning: unused variable 'x' [-Wunused-variable] int x; ^