Codeforces Round #754 (Div. 2) C

Posted 2022-01-31 yeah17981

某个b这场的c题死都找不到bug，不然就绿了呜呜呜，对我到现在都没绿我可菜了

结果发现是中间变量忘了清零了草

给一串只有abc的字符串，求最短子串满足其中的a的数量大于b的数量

首先子串开头结尾都为a，中间bc、cb、c、b、bbacc、ccabb、空

结束

#include <bits/stdc++.h>

using namespace std;
char s[1000006];
int a1[1000006];
int b1[1000006];
int c1[1000006];
int main()

	int n,a,b,c;
	cin>>n;	
	int l=1,r=a;
		int ans=0;
	while(n--)
	

		cin>>a;
		cin>>s+1;
		l=0;
		b=0;c=0;
		int flag=0;
		int minn=3,maxx=3;
		for(int i=1;i<=a;i++)
		
			if(s[i]=='a')
			
				if(l!=0)
				
				a1[i]=i-l;
				b1[i]=b;
				c1[i]=c;
				
				b=0;
				c=0;
				l=i;
				if(a1[i]==1)
				
					flag=1;
					break;
				
			
			if(s[i]=='b')
			
				b++;
			
			if(s[i]=='c')
			
				c++;
			
		
		int k=-1;
		b=-1;
		c=-1;
		ans=-1;
		for(int i=1;i<=a;i++)
		
			if(a1[i]!=0)
			
				if(a1[i]<=3)
				
					if(k==3&&a1[i]==3&&b+b1[i]==2&&c+c1[i]==2)
					
						if(ans==-1)
						
							ans=7;
						
					  
					k=a1[i];
					
					b=b1[i];
					
					c=c1[i];
					
					if(b<=1&&c<=1)
					
						if(ans==-1) ans=b+c+2;
						ans=min(ans,b+c+2);
					  
				
				else
				
					k=0;
					b=0;
					c=0;
				
				a1[i]=0;
				b1[i]=0;
				c1[i]=0;
			
		
		if(flag==1)
		
			cout<<2<<"\\n";
			continue;
		
		cout<<ans<<"\\n";
	
  
// 10000000
//9
//aabbabaca
//7
//abbabba