Compilare: user.cpp: In function ‘int zeroes(int)’: user.cpp:6:25: warning: suggest parentheses around arithmetic in operand of ‘^’ [-Wparentheses] return (x ^ (x - 1) & x); ^ user.cpp: At global scope: user.cpp:11:23: warning: integer overflow in expression [-Woverflow] int inf = (1 << 31) - 1; ^ user.cpp: In function ‘int add(int)’: user.cpp:15:12: warning: statement has no effect [-Wunused-value] for(val; val > 0; val -= zeroes(val)) ^ user.cpp: In function ‘void update(int, int)’: user.cpp:21:10: warning: statement has no effect [-Wunused-value] for(x; x < n << 1; x += zeroes(x)) ^ user.cpp: In function ‘void del(int)’: user.cpp:26:12: warning: statement has no effect [-Wunused-value] for(poz; poz < n << 1; poz += zeroes(poz)) ^ user.cpp: In function ‘int main()’: user.cpp:45:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < L[i].size(); j ++) { ^ user.cpp:55:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j == L[i].size() - 1) ^ user.cpp:65:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < L[i].size(); j ++) { ^