oj.uz

Submission #26638

# Submission time Handle Problem Language Result Execution time Memory
26638 2017-07-03T16:18:47 Z yutaka1999 Match (CEOI16_match) C++14
100 / 100
 23 ms 21688 KB 
#include <cstdio>
#include <cstdlib>
#include <algorithm>
#include <vector>
#include <cstring>
#define SIZE 100005
#define M1 1000000007LL
#define B1 89793LL
#define M2 1000000009LL
#define B2 799923LL
#define ALP 30

using namespace std;
typedef long long int ll;
typedef pair <ll,ll> PL;
typedef pair <PL,int> PLL;

char A[SIZE];
int to[SIZE];
int st[SIZE];
int back[SIZE][ALP];
PL ht[SIZE];
ll r1[SIZE],r2[SIZE];
char ans[SIZE];
int n;

void calc()
{
	r1[0]=r2[0]=1;
	for(int i=1;i<SIZE;i++)
	{
		r1[i]=r1[i-1]*B1%M1;
		r2[i]=r2[i-1]*B2%M2;
	}
	int sz=0;
	ll h1=0,h2=0;
	for(int i=n-1;i>=0;i--)
	{
		if(sz>0&&A[st[sz-1]]==A[i])
		{
			sz--;
			h1-=(ll) (A[i]-'a'+1)*r1[sz]%M1;
			if(h1<0) h1+=M1;
			h2-=(ll) (A[i]-'a'+1)*r2[sz]%M2;
			if(h2<0) h2+=M2;
		}
		else
		{
			st[sz]=i;
			h1+=(ll) (A[i]-'a'+1)*r1[sz]%M1;
			if(h1>=M1) h1-=M1;
			h2+=(ll) (A[i]-'a'+1)*r2[sz]%M2;
			if(h2>=M2) h2-=M2;
			sz++;
		}
		ht[i]=PL(h1,h2);
	}
	vector <PLL> vx;
	for(int i=0;i<n;i++) vx.push_back(PLL(ht[i],i));
	vx.push_back(PLL(PL(0,0),n));
	sort(vx.begin(),vx.end());
	memset(to,-1,sizeof(to));
	for(int i=0;i<vx.size();)
	{
		int f=i;
		int bef=-1;
		for(;i<vx.size()&&vx[i].first==vx[f].first;i++)
		{
			to[vx[i].second-1]=bef;
			bef=vx[i].second;
		}
	}
}
int main()
{
	scanf("%s",&A);
	n=strlen(A);
	calc();
	int now=n-1;
	while(now>=0)
	{
		if(to[now]==-1) break;
		now=to[now]-1;
	}
	if(now!=-1)
	{
		puts("-1");
		return 0;
	}
	//for(int i=0;i<n;i++) printf("%d ",to[i]);puts("");
	memset(back,-1,sizeof(back));
	for(int i=0;i<n;i++)
	{
		if(to[i]>0)
		{
			for(int j=0;j<ALP;j++)
			{
				if(to[i]==0) back[i][j]=-1;
				else back[i][j]=back[to[i]-1][j];
			}
		}
		back[i][A[i]-'a']=i;
		//printf("%d : %d %d\n",i,back[i][0],back[i][1]);
	}
	int sz=0;
	st[sz++]=n;
	for(int i=0;i<n;i++)
	{
		if(st[sz-1]==i)
		{
			//(
			printf(")");
			sz--;
		}
		else
		{
			printf("(");//)
			int to=back[st[sz-1]-1][A[i]-'a'];
			//printf("%d %d\n",i,to);
			st[sz++]=to;
		}
	}
	puts("");
	return 0;
}

Compilation message

match.cpp: In function 'void calc()':
match.cpp:63:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<vx.size();)
               ^
match.cpp:67:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(;i<vx.size()&&vx[i].first==vx[f].first;i++)
         ^
match.cpp: In function 'int main()':
match.cpp:76:15: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[100005]' [-Wformat=]
  scanf("%s",&A);
               ^
match.cpp:76:16: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%s",&A);
                ^

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 16996 KB Output is correct
2 Correct 0 ms 16996 KB Output is correct
3 Correct 0 ms 16996 KB Output is correct

Subtask #2
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 16996 KB Output is correct
2 Correct 0 ms 16996 KB Output is correct
3 Correct 0 ms 16996 KB Output is correct
4 Correct 3 ms 16996 KB Output is correct
5 Correct 3 ms 16996 KB Output is correct
6 Correct 3 ms 17168 KB Output is correct
7 Correct 0 ms 17168 KB Output is correct

Subtask #3
63.0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 16996 KB Output is correct
2 Correct 0 ms 16996 KB Output is correct
3 Correct 0 ms 16996 KB Output is correct
4 Correct 3 ms 16996 KB Output is correct
5 Correct 3 ms 16996 KB Output is correct
6 Correct 3 ms 17168 KB Output is correct
7 Correct 0 ms 17168 KB Output is correct
8 Correct 6 ms 17364 KB Output is correct
9 Correct 3 ms 17364 KB Output is correct
10 Correct 6 ms 17364 KB Output is correct
11 Correct 6 ms 17364 KB Output is correct
12 Correct 19 ms 19384 KB Output is correct
13 Correct 19 ms 19384 KB Output is correct
14 Correct 19 ms 21688 KB Output is correct
15 Correct 23 ms 21688 KB Output is correct
16 Correct 19 ms 21688 KB Output is correct
17 Correct 23 ms 21688 KB Output is correct
18 Correct 16 ms 21688 KB Output is correct
19 Correct 16 ms 21688 KB Output is correct
20 Correct 16 ms 19384 KB Output is correct
21 Correct 16 ms 21688 KB Output is correct