Submission #964786

#	Time	Username	Problem	Language	Result	Execution time	Memory
964786		efedmrlr	Rope (JOI17_rope)	C++17	55 / 100	1386 ms	262144 KiB

rope

// #pragma GCC optimize("O3,Ofast,unroll-loops")
// #pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#include <bits/stdc++.h>

using namespace std;


#define lli long long int
#define MP make_pair
#define pb push_back
#define REP(i,n) for(int i = 0; (i) < (n); (i)++)
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()


void fastio() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
}


const double EPS = 0.00001;
const int INF = 1e9+500;
const int N = 3e5+5;
const int ALPH = 26;
const int LGN = 25;
constexpr int MOD = 1e9+7;
int n,m,q;
vector<int> a;
vector<int> cnt1, cnt2;
map<array<int,2>, int> mpp1, mpp2;
inline void solve() {
    cin>>n>>m;
    a.resize(n + 5);
    cnt1.assign(m + 5, 0);
    cnt2.assign(m + 5, 0);
    for(int i = 1; i<=n; i++) {
        cin >> a[i];
    } 
    for(int i = 1; i<n; i+=2) {
        cnt1[a[i]]++;
        cnt1[a[i + 1]]++;  
        mpp1[{min(a[i], a[i + 1]), max(a[i], a[i + 1])}]++;

    }
    for(int i = 2; i<n; i+=2) {
        cnt2[a[i]]++;
        cnt2[a[i + 1]]++;  
        mpp2[{min(a[i], a[i + 1]), max(a[i], a[i + 1])}]++;
        
    }
    vector<int> res(m + 1, INF);
    for(int i = 1; i <= m; i++) {
        for(int j = i + 1; j <= m; j++) {
            int ret = n;
            if((n & 1) && (a[n] == i || a[n] == j)) {
                ret--;
            }
            ret -= cnt1[i] + cnt1[j];
            ret += mpp1[{i, j}];
            res[i] = min(res[i], ret);
            res[j] = min(res[j], ret);
            ret = n;
            if(!(n & 1) && (a[n] == i || a[n] == j)) {
                ret--;
            }
            if(a[1] == i || a[1] == j) {
                ret--;
            }
            ret -= cnt2[i] + cnt2[j];
            ret += mpp2[{i, j}];
            res[i] = min(res[i], ret);
            res[j] = min(res[j], ret);
        }
    }
    for(int i = 1; i<=m; i++) {
        int ret = n - cnt1[i];
        if((n & 1) && a[n] == i) ret--;
        res[i] = min(res[i], ret);
        cout << res[i] << "\n"; 
    }
}
 
signed main() {

    fastio();
    int test = 1;
    //cin>>test;
    while(test--) {
        solve();
    }
    
}

• Subtask 1: 15 / 15
• Subtask 2: 30 / 30
• Subtask 3: 10 / 10
• Subtask 4: 0 / 25
• Subtask 5: 0 / 20