如题,虽然说数据有误,但是貌似是第四个点,我这个是最后一个点 WA 了,不是很能理解为什么,希望有巨佬能够帮个忙 awa
#include <bits/stdc++.h>
#define int long long
using namespace std;
const int N = 3000;
int f[N + 10][N + 10], A[N + 10], B[N + 10], n;
signed main() {
cin >> n;
for(int i = 1; i <= n; i++)
cin >> A[i];
for(int i = 1; i <= n; i++)
cin >> B[i];
f[0][0] = 0;
int ans = 0;
for(int i = 1; i <= n; i++) {
int tmp = 0;
for(int j = 0; j <= n; j++) {
if(j >= 1)
if(B[j - 1] < A[i]) tmp = max(tmp, f[i - 1][j - 1] + 1);
if(A[i] != B[j]) {
f[i][j] = f[i - 1][j];
continue;
}
f[i][j] = max(f[i - 1][j], tmp);
}
}
for(int i = 1; i <= n; i++) {
ans = max(ans, f[n][i]);
}
cout << ans << endl;
}