Compilare: user.cpp: In function ‘void solve()’: user.cpp:194:16: warning: unused variable ‘j’ [-Wunused-variable] int i, mx, j; ^ user.cpp:192:30: 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:197:33: 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:203:34: 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:175:76: warning: ‘pozb’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(bitb[i] == 0 && bita[i] == 0 && bit[i] >= 0 && okb == 0 && pozb != i) ^ user.cpp:142:38: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] bits[poz] = 1; ^