Compilare: user.cpp: In function ‘int main()’: user.cpp:43:29: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] if(!a[1][i]) dp[l][(1<<i-1)] = 1; ^ user.cpp:26:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d %d",&N,&M,&K); ^ user.cpp:27:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&P); ^ user.cpp:30:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d",&x,&y); ^