Compilare: main.c: In function 'z': main.c:7:13: warning: suggest parentheses around '-' inside '<<' [-Wparentheses] if(l>(1<<n-1)+a){ ~^~ main.c:9:13: warning: suggest parentheses around '-' inside '<<' [-Wparentheses] a+=(1<<n-1); ~^~ main.c:11:13: warning: suggest parentheses around '-' inside '<<' [-Wparentheses] if(c>(1<<n-1)+b){ ~^~ main.c:13:13: warning: suggest parentheses around '-' inside '<<' [-Wparentheses] b+=(1<<n-1); ~^~ main.c: In function 'main': main.c:21:3: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&n,&k); ^~~~~~~~~~~~~~~~~~~~~~~~ main.c:24:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&l,&c); ^~~~~~~~~~~~~~~~~~~~~~~~