Submission #5186661

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Source Code Expand

#include<cstdio>
#include<algorithm>
using namespace std;
int ans,sum,num;
int main() 
{
	int a,b;
	scanf("%d%d",&a,&b);
	int ag=a%10,as=a/10%10,ab=a/100%10;
	int bg=b%10,bs=b/10%10,bb=b/100%10;
	if(ab==9&&bb!=1)
	{
		num=bg+bs*10+100;
		ans=a-num;
	}
	if(ab!=9&&bb==1)
	{
		sum=ag+as*10+900;
		ans=sum-b;
	}
	if(ab!=9&&bb!=1)
	{
		sum=ag+as*10+900;
		num=bg+bs*10+100;
		ans=max(sum-b,a-num);
	}
	if(ab==9&&bb==1)
	{
		if(as==9&&bs!=0)
		{
			num=bg+bb*100;
			ans=a-num;
		}
		if(as!=9&&bs==0)
		{
			sum=ag+90+ab*100;
			ans=sum-b;
		}
		if(as!=9&&bs!=0)
		{
			sum=ag+90+ab*100;
			num=bg+bb*100;
			ans=max(sum-b,a-num);
		}
		if(as==9&&bs==0)
		{
			if(ag==9&&bg!=0)
			{
				num=bs*10+bb*100;
				ans=a-num;
			}
			if(ag!=9&&bg==0)
			{
				sum=9+as*10+ab*100;
				ans=sum-b;
			}
			if(ag!=9&&bg!=0)
			{
				sum=9+as*10+ab*100;
				num=bs*10+bb*100;
				ans=max(sum-b,a-num);
			}
			if(ag==9&&bg==0)
			{
				printf("898\n");
				return 0;
			}
		}
	}
	printf("%d\n",ans);
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:8:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&a,&b);
                     ^

Judge Result