oj.uz

Submission #238438

# Submission time Handle Problem Language Result Execution time Memory
238438 2020-06-11T09:56:12 Z MishoKostov Trener (COCI20_trener) C++14
55 / 110
 2000 ms 7928 KB 
#include<bits/stdc++.h>
#define endl "\n"

using namespace std;

const int nmax=2048, mod=1000000007;
int pi[nmax];
string a[64][nmax];
int n, m;
int r[nmax][nmax];

bool kmp(string s, string b)
{
    int x=s.size();
    s+="#"+b;
    //cout<<s<<endl;
    int sz=s.size();
    for(int i=1; i<sz; ++i)
    {
        int j=pi[i-1];
        while(j>0&&s[i]!=s[j]) j=pi[j-1];
        if(s[i]==s[j]) j++;
        pi[i]=j;
        if(pi[i]==x) return true;
    }
    return false;
}

int main()
{
	//ios_base::sync_with_stdio(false);
	//cin.tie(NULL);
	//cout.tie(NULL);

	cin>>n>>m;
	for(int i=0; i<n; ++i)
    {
        for(int j=0; j<m; ++j) cin>>a[i][j];
    }
    if(n==1) cout<<m<<endl, exit(0);
    for(int i=0; i<m; ++i) r[0][i]=1;
    for(int i=0; i<n-1; ++i)
    {
        for(int j=0; j<m; ++j)
        {
            for(int k=0; k<m; ++k)
            {
                if(kmp(a[i][j], a[i+1][k])) r[i+1][k]+=r[i][j], r[i+1][k]%=mod;
            }
        }
    }
    //for(int i=1; i<n; ++i, cout<<endl)
    //    for(int j=0; j<m; ++j) cout<<r[i][j]<<" ";
    int sum=0;
    for(int i=0; i<m; ++i) sum+=r[n-1][i], sum%=mod;
    cout<<sum<<endl;
 	return 0;
}

Subtask #1
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 4480 KB Output is correct
2 Correct 7 ms 4480 KB Output is correct
3 Correct 7 ms 4480 KB Output is correct
4 Correct 7 ms 4480 KB Output is correct

Subtask #2
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 183 ms 4856 KB Output is correct
2 Correct 184 ms 4856 KB Output is correct
3 Correct 186 ms 4856 KB Output is correct
4 Correct 222 ms 4856 KB Output is correct
5 Correct 253 ms 4860 KB Output is correct
6 Correct 257 ms 4840 KB Output is correct
7 Correct 226 ms 4856 KB Output is correct

Subtask #3
0 / 55.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 4480 KB Output is correct
2 Correct 7 ms 4480 KB Output is correct
3 Correct 7 ms 4480 KB Output is correct
4 Correct 7 ms 4480 KB Output is correct
5 Correct 183 ms 4856 KB Output is correct
6 Correct 184 ms 4856 KB Output is correct
7 Correct 186 ms 4856 KB Output is correct
8 Correct 222 ms 4856 KB Output is correct
9 Correct 253 ms 4860 KB Output is correct
10 Correct 257 ms 4840 KB Output is correct
11 Correct 226 ms 4856 KB Output is correct
12 Execution timed out 2087 ms 7928 KB Time limit exceeded
13 Halted 0 ms 0 KB -