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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#644048#9454. String of CCPCyhdddAC ✓24ms16604kbC++141.7kb2024-10-16 10:22:542024-10-16 10:23:36

Judging History

你现在查看的是最新测评结果

  • [2024-10-16 10:23:36]
  • 评测
  • 测评结果:AC
  • 用时:24ms
  • 内存:16604kb
  • [2024-10-16 10:22:54]
  • 提交

answer

#include<bits/stdc++.h>
#define int long long
#define mod 998244353ll
#define pii pair<int,int>
#define fi first
#define se second
#define mems(x,y) memset(x,y,sizeof(x))
#define pb push_back
#define db double
using namespace std;
const int maxn=200010;
const int inf=1e18;
inline int read(){
	int x=0,f=1;
	char ch=getchar();
	while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}
	while(ch>='0'&&ch<='9'){x=(x<<3)+(x<<1)+(ch-48);ch=getchar();}
	return x*f;
}
bool Mbe;

int n;
char s[maxn];
int dp[maxn][4][2];
int c[10];
int nxt[4][2];
void work(){
	n=read();scanf("%s",s+1);
	for(int i=0;i<=n;i++){
		for(int j=0;j<4;j++)dp[i][j][0]=dp[i][j][1]=-inf;
	}
	c[0]=c[1]=c[3]='C',c[2]='P';
	c[4]=c[5]=c[7]='C',c[6]='P';
	nxt[0][0]=0,nxt[1][0]=0,nxt[2][0]=2,nxt[3][0]=0;
	nxt[0][1]=1,nxt[1][1]=2,nxt[2][1]=3,nxt[3][1]=1;
	dp[0][0][0]=0,dp[0][1][1]=0;
	for(int i=1;i<=n;i++){
		for(int j=0;j<4;j++){
			for(int p=0;p<2;p++)if(dp[i-1][j][p]>=0){
				// cout<<i-1<<" "<<j<<" "<<p<<" "<<dp[i-1][j][p]<<"\n";
				if(s[i]==c[j]){
					dp[i][nxt[j][1]][p]=max(dp[i][nxt[j][1]][p],dp[i-1][j][p]+(j==3));
				}
				else{
					dp[i][nxt[j][0]][p]=max(dp[i][nxt[j][0]][p],dp[i-1][j][p]);
				}
			}
			if(s[i]==c[j]){
				dp[i][nxt[nxt[j][1]][1]][1]=max(dp[i][nxt[nxt[j][1]][1]][1],dp[i-1][j][0]+(j+1>=3));
				dp[i][nxt[nxt[j][1]][0]][1]=max(dp[i][nxt[nxt[j][1]][0]][1],dp[i-1][j][0]+(j>=3));
			}
			else{
				dp[i][nxt[nxt[j][0]][1]][1]=max(dp[i][nxt[nxt[j][0]][1]][1],dp[i-1][j][0]);
			}
		}
	}
	int ans=0;
	for(int i=0;i<4;i++)ans=max({ans,dp[n][i][0],dp[n][i][1]});
	printf("%lld\n",ans);
}

bool Med;
int T;
signed main(){
	T=read();
	while(T--)work();
}

这程序好像有点Bug,我给组数据试试?

详细

Test #1:

score: 100
Accepted
time: 1ms
memory: 3908kb

input:

3
3
CCC
5
CCCCP
4
CPCP

output:

1
1
1

result:

ok 3 lines

Test #2:

score: 0
Accepted
time: 24ms
memory: 16604kb

input:

20003
5
PCCPC
10
CPPPPCPCPC
4
CPPC
11
CCPPCPPPCCP
17
PPPPCPCCCCCPCCCCC
10
PPCCPCPPCP
9
CPCCCCPPC
11
PCPPPPCCPPP
15
CPCPPPPCCPCPCCC
11
PCCPPCCPCPP
9
PCPCCPPCP
10
CCPCPPPCPP
14
CCCCPPPCPCPCPP
2
CC
12
CCPCPPPPPCPP
6
CPPPPP
12
PCCPCCCCCPCC
16
CPCCPCCPPCCCCPPC
7
CPPPCPC
16
PPPPPCCPCPCPCPPC
13
PPPCPCCCCPP...

output:

1
1
0
1
2
1
1
1
2
2
1
1
1
0
1
0
3
2
1
2
1
2
2
0
1
2
3
1
1
3
1
2
2
1
0
0
0
3
1
0
0
1
1
2
0
1
1
0
1
2
0
1
0
1
0
3
1
1
0
2
1
3
2
2
0
2
2
0
0
2
1
1
3
3
1
3
1
2
0
1
1
0
1
2
2
1
1
2
1
3
1
1
3
1
2
2
0
1
0
3
0
1
1
2
2
0
2
1
1
2
2
0
3
1
1
1
1
2
1
2
0
1
1
0
3
0
3
1
1
0
0
1
0
3
0
1
1
1
1
2
2
1
1
0
0
1
2
0
1
2
...

result:

ok 20003 lines

Extra Test:

score: 0
Extra Test Passed