Submission #1269154

#	Time	Username	Problem	Language	Result	Execution time	Memory
1269154		BuiDucManh123	Longest beautiful sequence (IZhO17_subsequence)	C++20	100 / 100	2520 ms	129372 KiB

subsequence

#include <bits/stdc++.h>
#define fi first
#define se second
#define ll long long
#define ull unsigned long long
#define pii pair<int, int>
#define pll pair<ll, ll>
#define pb push_back
#define taskname ""
#define ld long double
const int mod = 1e9+7;
using namespace std;
int a[100009], k[100009], dp[100009], f[2009][2009][30], cnt[2009], trace[100009];
signed main() {
    if (fopen(taskname".inp","r")) {
        freopen(taskname".inp","r",stdin);
        freopen(taskname".out","w",stdout);
    }
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    int n;
    cin >> n;
    for(int i = 1; i <= n; i++){
        cin >> a[i];
    }
    for(int i = 1; i <= n; i++){
        cin >> k[i];
    }
    for(int i = 0; i < (1 << 10); i++){
        for(int j = 0; j < 10; j++){
            if((i >> j) & 1){
                cnt[i]++;
            }
        }
    }
    int ans = 0;
    int chose = 0;
    for(int i = 1; i <= n; i++){
        int left = a[i] >> 10;
        int right = a[i] - (left << 10);
        //cout << left << " " << right << "\n";
        int ma = 0;
        int pos = 0;
        for(int j = 0; j < (1 << 10); j++){
            int sz = j & left;
            if(ma < dp[f[j][right][k[i] - cnt[sz]]]){
                ma = dp[f[j][right][k[i] - cnt[sz]]];
                pos = f[j][right][k[i] - cnt[sz]];
            }
        }
        dp[i] = ma + 1;
        trace[i] = pos;
        for(int j = 0; j < (1 << 10); j++){
            int x = j & right;
            if(dp[i] > dp[f[left][j][cnt[x]]]){
                f[left][j][cnt[x]] = i;
            }
        }
        if(ans < dp[i]){
            ans = dp[i];
            chose = i;
        }
    }
    vector<int> hehe;
    while(chose){
        hehe.pb(chose);
        chose = trace[chose];
    }
    cout << hehe.size() << "\n";
    reverse(hehe.begin(), hehe.end());
    for(int x : hehe){
        cout << x << " ";
    }
    return 0;
}

Compilation message (stderr)

subsequence.cpp: In function 'int main()':
subsequence.cpp:16:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |         freopen(taskname".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
subsequence.cpp:17:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |         freopen(taskname".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 16 / 16
• Subtask 3: 17 / 17
• Subtask 4: 60 / 60