Submission #5968450

Source Code Expand

#include <bits/stdc++.h>
#define N (long long)(1e9 + 7)
using namespace std;

long long n, m;
vector<long long> s, t;
long long dp[2005][2005] = {0};

long long solve();

int main() {
  cin >> n >> m;
  s.resize(n);
  t.resize(m);
  for(int i = 0; i < n; ++i) cin >> s[i];
  for(int i = 0; i < m; ++i) cin >> t[i];
  cout << solve() << endl;
  return 0;
}

long long solve() {
  dp[0][0] = 1;
  for(int i = 0; i <= n; ++i) dp[i][0] = 1;
  for(int i = 0; i <= m; ++i) dp[0][i] = 1;
  for(int i = 0; i < n; ++i)
    for(int j = 0; j < m; ++j) {
      dp[i + 1][j + 1] =
          (dp[i + 1][j] + dp[i][j + 1] - dp[i][j] + N) % N;
      if(s[i] == t[j]) dp[i + 1][j + 1] += dp[i][j] % N;
      dp[i + 1][j + 1] %= N;
    }

  return dp[n][m];
}

Submission Info

Submission Time
Task E - Common Subsequence
User m_tsubasa
Language C++14 (GCC 5.4.1)
Score 500
Code Size 774 Byte
Status AC
Exec Time 43 ms
Memory 31616 KiB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 500 / 500
Status
AC × 5
AC × 33
Set Name Test Cases
Sample s1.txt, s2.txt, s3.txt, s4.txt, s5.txt
All 01.txt, 02.txt, 03.txt, 04.txt, 05.txt, 06.txt, 07.txt, 08.txt, 09.txt, 10.txt, 11.txt, 12.txt, 13.txt, 14.txt, 15.txt, 16.txt, 17.txt, 18.txt, 19.txt, 20.txt, 21.txt, 22.txt, 23.txt, 24.txt, 25.txt, 26.txt, 27.txt, 28.txt, s1.txt, s2.txt, s3.txt, s4.txt, s5.txt
Case Name Status Exec Time Memory
01.txt AC 1 ms 384 KiB
02.txt AC 1 ms 512 KiB
03.txt AC 1 ms 512 KiB
04.txt AC 1 ms 384 KiB
05.txt AC 1 ms 512 KiB
06.txt AC 40 ms 31488 KiB
07.txt AC 41 ms 31232 KiB
08.txt AC 39 ms 30976 KiB
09.txt AC 39 ms 31104 KiB
10.txt AC 38 ms 30976 KiB
11.txt AC 40 ms 30976 KiB
12.txt AC 40 ms 30976 KiB
13.txt AC 40 ms 30976 KiB
14.txt AC 40 ms 30976 KiB
15.txt AC 39 ms 30976 KiB
16.txt AC 39 ms 30976 KiB
17.txt AC 41 ms 31488 KiB
18.txt AC 39 ms 30976 KiB
19.txt AC 39 ms 30976 KiB
20.txt AC 39 ms 30976 KiB
21.txt AC 43 ms 31104 KiB
22.txt AC 42 ms 31360 KiB
23.txt AC 4 ms 9216 KiB
24.txt AC 37 ms 30976 KiB
25.txt AC 9 ms 29568 KiB
26.txt AC 4 ms 1664 KiB
27.txt AC 41 ms 31616 KiB
28.txt AC 41 ms 31616 KiB
s1.txt AC 1 ms 256 KiB
s2.txt AC 1 ms 256 KiB
s3.txt AC 1 ms 256 KiB
s4.txt AC 1 ms 256 KiB
s5.txt AC 1 ms 384 KiB