Compilare: user.cpp: In function ‘void Compute(int)’: user.cpp:43:26: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] if( ( mask & 1<<j-1 ) ) ^ user.cpp:44:37: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] if( v[j][i] ) a |= (1<<j-1); ^ user.cpp:45:28: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] else b |= (1<<j-1); ^ user.cpp:43:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if( ( mask & 1<<j-1 ) ) ^ user.cpp: In function ‘void Read()’: user.cpp:19:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n",&N,&L); ^ user.cpp:22:28: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(s,NMax,stdin); ^ user.cpp:25:49: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(i = 1; i <= L; ++i) scanf("%d",&cost[i]); ^ user.cpp: In function ‘int main()’: user.cpp:69:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sobo.in","r",stdin); ^ user.cpp:70:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sobo.out","w",stdout); ^