Compilare: user.cpp: In function ‘int main()’: user.cpp:43:27: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] dp[i&1][j]=dp[1-i&1][dq[b]]+s-(sp[j]-sp[dq[b]]); ^ user.cpp:45:24: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] if(best>dp[1-i&1][last]-sp[last]) ^ user.cpp:46:23: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] best=dp[1-i&1][last]-sp[last]; ^ user.cpp:19:13: warning: unused variable ‘poz’ [-Wunused-variable] int i,j,poz,b,e,last,n,k,s,x; ^ user.cpp:23:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d %d " ,&n,&k,&s); ^ user.cpp:25:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d " ,&x); ^