Compilare: user.cpp: In function ‘int main()’: user.cpp:14:49: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] for(x = 0, i = 1; i <= K; ++i) x = x | (1<<i-1); ^ user.cpp:26:20: warning: suggest parentheses around ‘-’ inside ‘>>’ [-Wparentheses] if( ( (x>>i-1) & 1 ) ) ^ user.cpp:28:24: warning: suggest parentheses around ‘-’ inside ‘>>’ [-Wparentheses] if( ( (x>>j-1) & 1 ) == 0 ) ^ user.cpp:31:30: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] y = y ^ (1<<j-1); ^ user.cpp:32:30: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] y = y ^ (1<<i-1); ^ user.cpp:8:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bile3.in","r",stdin); ^ user.cpp:9:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bile3.out","w",stdout); ^ user.cpp:13:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&N,&K); ^