제출 #465424

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
465424		Yuisuyuno	Longest beautiful sequence (IZhO17_subsequence)	C++14	40 / 100	6031 ms	5336 KiB

subsequence

//Nguyen Huu Hoang Minh
#include <bits/stdc++.h>
#define sz(x) int(x.size())
#define all(x) x.begin(),x.end()
#define reset(x) memset(x, 0,sizeof(x))
#define bc(x) __builtin_popcount(x)
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define N 100005
#define remain(x) if (x > MOD) x -= MOD
#define ii pair<int, int>
#define iiii pair< ii , ii >
#define viiii vector< iiii >
#define vi vector<int>
#define vii vector< ii >
#define bit(x, i) (((x) >> (i)) & 1)
#define Task "test"
#define int long long

using namespace std;

typedef long double ld;
const int inf = 1e10;
const int minf = -1e10;

int n;
int a[N];
int k[N];

void readfile()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);cout.tie(0);
    if (fopen(Task".inp","r"))
    {
        freopen(Task".inp","r",stdin);
        //freopen(Task".out","w",stdout);
    }
    cin >> n;
    for(int i=1; i<=n; i++) cin >> a[i];
    for(int i=1; i<=n; i++) cin >> k[i];
}

int dp[N];
int Mx[N], ptr;
int trc[N];

void proc()
{
    for(int i=1; i<=n; i++) dp[i] = 1;
    int mx=1, ptr=1;
    for(int i=1; i<=n; i++){
        Mx[i] = max(Mx[i-1],dp[i]);
        if (bc(a[i]) < k[i]) continue;
        for(int j=i-1; j>=1; j--){
            if (bc(a[i] & a[j])==k[i]){
                if (dp[j] >= dp[i]){
                    dp[i] = dp[j]+1;
                    trc[i] =j;
                }
                if (dp[i] > mx){
                    mx = dp[i];
                    ptr = i;
                }
            }
            if (Mx[j] < dp[i]) break;
        }
        Mx[i] = max(Mx[i-1],dp[i]);
    }
    vector<int> ans;
    while (ptr){
        ans.pb(ptr);
        ptr=trc[ptr];
    }
    reverse(all(ans));
    cout << ans.size() << '\n';
    for(auto x : ans) cout << x << ' ';
}

signed main()
{
    readfile();
    proc();
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

subsequence.cpp: In function 'void readfile()':
subsequence.cpp:38:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |         freopen(Task".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

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