Compilare: user.cpp: In function ‘void solve()’: user.cpp:87:12: warning: unused variable ‘mx’ [-Wunused-variable] int i, mx, j; ^ user.cpp:87:16: warning: unused variable ‘j’ [-Wunused-variable] int i, mx, j; ^ user.cpp:85:30: 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:90:33: 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:96:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d", &a, &b); ^