Compilare: main.cpp: In function 'int main()': main.cpp:13:44: warning: suggest parentheses around arithmetic in operand of '|' [-Wparentheses] sol ^= ((1 << msk) & (num << 1) | i) ; ~~~~~~~~~~~^~~~~~~~~~~~ main.cpp:18:37: warning: suggest parentheses around arithmetic in operand of '|' [-Wparentheses] sol |= (msk ^ (1 << i) | (1 << n)) ; ~~~~^~~~~~~~~~ main.cpp:7:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &n) ; ^ main.cpp:11:48: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &num) ; ^ main.cpp:36:25: warning: ignoring return value of 'int system(const char*)', declared with attribute warn_unused_result [-Wunused-result] system("pause") ; ^