Submission #298794

#	Time	Username	Problem	Language	Result	Execution time	Memory
298794		caoash	Longest beautiful sequence (IZhO17_subsequence)	C++14	0 / 100	26 ms	45440 KiB

subsequence

#include <bits/stdc++.h> 
using namespace std;

using ll = long long;

using vi = vector<int>;
using vl = vector<ll>;
#define pb push_back
#define rsz resize
#define all(x) begin(x), end(x)
#define sz(x) (int)(x).size()

using pi = pair<int,int>;
#define f first
#define s second
#define mp make_pair

const int MX = 100005;
const int MOD = (int) (1e9 + 7);

namespace output {
    void pr(int x) { cout << x; }
    void pr(long x) { cout << x; }
    void pr(ll x) { cout << x; }
    void pr(unsigned x) { cout << x; }
    void pr(unsigned long x) { cout << x; }
    void pr(unsigned long long x) { cout << x; }
    void pr(float x) { cout << x; }
    void pr(double x) { cout << x; }
    void pr(long double x) { cout << x; }
    void pr(char x) { cout << x; }
    void pr(const char* x) { cout << x; }
    void pr(const string& x) { cout << x; }
    void pr(bool x) { pr(x ? "true" : "false"); }
    
    template<class T1, class T2> void pr(const pair<T1,T2>& x);
    template<class T> void pr(const T& x);
    
    template<class T, class... Ts> void pr(const T& t, const Ts&... ts) { 
        pr(t); pr(ts...); 
    }
    template<class T1, class T2> void pr(const pair<T1,T2>& x) { 
        pr("{",x.f,", ",x.s,"}"); 
    }
    template<class T> void pr(const T& x) { 
        pr("{"); // const iterator needed for vector<bool>
        bool fst = 1; for (const auto& a: x) pr(!fst?", ":"",a), fst = 0; 
        pr("}");
    }
    
    void ps() { pr("\n"); } // print w/ spaces
    template<class T, class... Ts> void ps(const T& t, const Ts&... ts) { 
        pr(t); if (sizeof...(ts)) pr(" "); ps(ts...); 
    }
    
    void pc() { cout << "]" << endl; } // debug w/ commas
    template<class T, class... Ts> void pc(const T& t, const Ts&... ts) { 
        pr(t); if (sizeof...(ts)) pr(", "); pc(ts...); 
    }
    #define dbg(x...) pr("[",#x,"] = ["), pc(x);
}
 
#ifdef LOCAL
using namespace output;
#endif

pi dp[MX];
int best[(1 << 10)][(1 << 10)][11];

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n;
    cin >> n;
    vi a(n), k(n);
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }
    for (int i = 0; i < n; i++) {
        cin >> k[i];
    }
    memset(best, -1, sizeof(best));
    for (int i = 0; i < n; i++) {
        dp[i] = mp(1, -1);
        //get current dp
        int fmask = (a[i] >> 10);
        int smask = (a[i] & 1023);
        // dbg(fmask, smask);
        for (int mask = 0; mask < (1 << 10); mask++) {
            int tmask = fmask & mask;
            int rem = k[i] - __builtin_popcount(tmask);
            if (rem < 0 || rem > 10) {
                continue;
            }
            int fr = best[mask][smask][rem];
            if(fr != -1) { 
                // dbg(i, mask, smask, rem, fr);
                dp[i] = max(dp[i], mp(dp[fr].f + 1, fr));
            }
        }
        //update future dp
        for (int mask = 0; mask < (1 << 10); mask++) {
            int cnt = __builtin_popcount(smask & mask);
            if(best[fmask][mask][cnt] != -1 && dp[i] > dp[best[fmask][mask][cnt]]) {
                best[fmask][mask][cnt] = i;
            }
        }
        // dbg(i, dp[i]);
    }
    pi curr = mp(-1, -1);
    for (int i = 0; i < n; i++) {
        curr = max(curr, mp(dp[i].f, i));
    }
    cout << curr.f << '\n';
    vi ret;
    while (curr.s != -1) {
        ret.pb(curr.s);
        curr = mp(curr.f, dp[curr.s].s);
    }
    reverse(all(ret));
    for (int i = 0; i < sz(ret); i++) {
        cout << ret[i] + 1 << " ";
    }
    cout << '\n';
}

• Subtask 1: 0 / 7
• Subtask 2: 0 / 16
• Subtask 3: 0 / 17
• Subtask 4: 0 / 60