Compilare: user.cpp: In function ‘int main()’: user.cpp:35:41: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] bst = std::min(bst, dp[1 - i & 1][pos] - sp[pos] - s); ^ user.cpp:41:34: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] while(e >= b && dp[1 - i & 1][deq[e]] + sp[deq[e]] >= dp[1 - i & 1][j] + sp[j]) ^ user.cpp:41:72: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] while(e >= b && dp[1 - i & 1][deq[e]] + sp[deq[e]] >= dp[1 - i & 1][j] + sp[j]) ^ user.cpp:44:56: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] dp[i & 1][j] = std::min(dp[i & 1][j], dp[1 - i & 1][deq[b]] + s - sp[j] + sp[deq[b]]); ^ user.cpp:17:37: 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:19:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d " ,&x); ^