Compilare: user.cpp: In function ‘void solve()’: user.cpp:184:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d", &k, &n); ^ user.cpp:189:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &bit[i]); ^ user.cpp:195:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d", &a, &b); ^ user.cpp: In function ‘int bitsMax()’: user.cpp:126:42: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] bits[poz] = 1; ^