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Submission #679168

# Submission time Handle Problem Language Result Execution time Memory
679168 2023-01-07T15:41:55 Z Lobo Abracadabra (CEOI22_abracadabra) C++17
100 / 100
 653 ms 47668 KB 
#include<bits/stdc++.h>
using namespace std;
const long long inf = (int) 1e9 + 10;
// #define int long long
#define dbl long double
#define endl '\n'
#define sc second
#define fr first
#define mp make_pair
#define pb push_back
#define all(x) x.begin(), x.end()
const int maxn = 2e5+10;
const int maxq = 1e6+10;

int n, q, tra[4*maxn], trsz[4*maxn], a[maxn], pos[maxn], sz[maxn];
vector<pair<int,int>> qrys[maxn];
int ans[maxq];

void builda(int no, int l, int r) {
    if(l == r) {
        tra[no] = a[l];
        return;
    }
    int lc=2*no,rc=2*no+1,mid=(l+r)>>1;
    builda(lc,l,mid);
    builda(rc,mid+1,r);
    tra[no] = max(tra[lc],tra[rc]);
}

int qrya(int no, int l, int r, int L, int R) {
    if(l > R || r < L) return 0;
    if(l >= L && r <= R) return tra[no];
    int lc=2*no,rc=2*no+1,mid=(l+r)>>1;
    return max(qrya(lc,l,mid,L,R),qrya(rc,mid+1,r,L,R));
}

void updsz(int no, int l, int r, int pos, int val) {
    if(l > pos || r < pos) return;
    if(l == r) {
        trsz[no] = val;
        return;
    }
    int lc=2*no,rc=2*no+1,mid=(l+r)>>1;
    updsz(lc,l,mid,pos,val);
    updsz(rc,mid+1,r,pos,val);
    trsz[no] = trsz[lc]+trsz[rc];
}
int qrysz(int no, int l, int r, int L, int R) {
    if(l > R || r < L) return 0;
    if(l >= L && r <= R) return trsz[no];
    int lc=2*no,rc=2*no+1,mid=(l+r)>>1;
    return qrysz(lc,l,mid,L,R)+qrysz(rc,mid+1,r,L,R);
}


void adjust(int x) {
    int l = pos[x];
    int r = pos[x]+sz[x]-1;
    auto mx = qrya(1,1,n,l,r);
    if(mx == x) return;
    sz[x] = pos[mx]-pos[x];
    updsz(1,1,n,x,sz[x]);
    sz[mx] = r-pos[mx]+1;
    updsz(1,1,n,mx,sz[mx]);
    adjust(x);
}

//last one with sum <= n/2
void cut(int no, int l, int r, int val) {
    if(l == r) {
        if(val == sz[l]) return;
        int x = a[pos[l]+val];
        sz[x] = pos[l]+sz[l]-1-pos[x]+1;
        updsz(1,1,n,x,sz[x]);
        sz[l] = val;
        updsz(1,1,n,l,sz[l]);
        adjust(x);
        return;
    }
    int lc=2*no,rc=2*no+1,mid=(l+r)>>1;
    if(val-trsz[lc] <= 0) cut(lc,l,mid,val);
    else cut(rc,mid+1,r,val-trsz[lc]);
}

int find(int no, int l, int r, int val) {
    if(l == r) {
        return a[pos[l]+val-1];
    }
    int lc=2*no,rc=2*no+1,mid=(l+r)>>1;
    if(val-trsz[lc] <= 0) return find(lc,l,mid,val);
    else return find(rc,mid+1,r,val-trsz[lc]);
}
void solve() {
    cin >> n >> q;

    for(int i = 1; i <= n; i++) {
        cin >> a[i];
        pos[a[i]] = i;
    }
    builda(1,1,n);

    sz[a[1]] = n;
    updsz(1,1,n,a[1],sz[a[1]]);
    adjust(a[1]);

    for(int i = 1; i <= q; i++) {
        int t,j; cin >> t >> j;
        if(t > n) t = n;
        qrys[t].pb(mp(j,i));
    }

    for(int i = 0; i <= n; i++) {
        for(auto X : qrys[i]) {
            int id = X.sc;
            int j = X.fr;
            ans[id] = find(1,1,n,j);
        }

        cut(1,1,n,n/2);
    }

    for(int i = 1; i <= q; i++) {
        cout << ans[i] << endl;
    }
}

int32_t main() {
    ios::sync_with_stdio(false); cin.tie(0);

    // freopen("in.in", "r", stdin);
    // freopen("out.out", "w", stdout);
    int tt = 1;
    // cin >> tt;
    while(tt--) {
        solve();
    }

}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 243 ms 28596 KB Output is correct
2 Correct 317 ms 27892 KB Output is correct
3 Correct 246 ms 26884 KB Output is correct
4 Correct 207 ms 27496 KB Output is correct
5 Correct 255 ms 29552 KB Output is correct
6 Correct 205 ms 29768 KB Output is correct
7 Correct 246 ms 29644 KB Output is correct
8 Correct 226 ms 28024 KB Output is correct
9 Correct 217 ms 27140 KB Output is correct
10 Correct 217 ms 26932 KB Output is correct
11 Correct 220 ms 26924 KB Output is correct
12 Correct 211 ms 24696 KB Output is correct
13 Correct 250 ms 25520 KB Output is correct
14 Correct 227 ms 29436 KB Output is correct
15 Correct 272 ms 27612 KB Output is correct
16 Correct 3 ms 5032 KB Output is correct
17 Correct 252 ms 25668 KB Output is correct
18 Correct 208 ms 25508 KB Output is correct
19 Correct 3 ms 5032 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 383 ms 43596 KB Output is correct
2 Correct 382 ms 42628 KB Output is correct
3 Correct 324 ms 36308 KB Output is correct
4 Correct 273 ms 34304 KB Output is correct
5 Correct 308 ms 34988 KB Output is correct
6 Correct 271 ms 35436 KB Output is correct
7 Correct 325 ms 38892 KB Output is correct
8 Correct 308 ms 39760 KB Output is correct
9 Correct 278 ms 34676 KB Output is correct
10 Correct 286 ms 38400 KB Output is correct
11 Correct 256 ms 32684 KB Output is correct
12 Correct 257 ms 32600 KB Output is correct
13 Correct 287 ms 38020 KB Output is correct
14 Correct 247 ms 35744 KB Output is correct
15 Correct 307 ms 40832 KB Output is correct
16 Correct 26 ms 12364 KB Output is correct
17 Correct 335 ms 36188 KB Output is correct
18 Correct 204 ms 28276 KB Output is correct
19 Correct 77 ms 17044 KB Output is correct
20 Correct 112 ms 18268 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 96 ms 13092 KB Output is correct
2 Correct 88 ms 12184 KB Output is correct
3 Correct 97 ms 12616 KB Output is correct
4 Correct 51 ms 11816 KB Output is correct
5 Correct 74 ms 11952 KB Output is correct
6 Correct 58 ms 11972 KB Output is correct
7 Correct 67 ms 11776 KB Output is correct
8 Correct 72 ms 11688 KB Output is correct
9 Correct 67 ms 12224 KB Output is correct
10 Correct 43 ms 11852 KB Output is correct
11 Correct 49 ms 11560 KB Output is correct
12 Correct 42 ms 11744 KB Output is correct
13 Correct 51 ms 11724 KB Output is correct
14 Correct 46 ms 11976 KB Output is correct
15 Correct 42 ms 11188 KB Output is correct
16 Correct 17 ms 8532 KB Output is correct
17 Correct 76 ms 10968 KB Output is correct
18 Correct 39 ms 9732 KB Output is correct
19 Correct 3 ms 5032 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct

Subtask #4
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 243 ms 28596 KB Output is correct
2 Correct 317 ms 27892 KB Output is correct
3 Correct 246 ms 26884 KB Output is correct
4 Correct 207 ms 27496 KB Output is correct
5 Correct 255 ms 29552 KB Output is correct
6 Correct 205 ms 29768 KB Output is correct
7 Correct 246 ms 29644 KB Output is correct
8 Correct 226 ms 28024 KB Output is correct
9 Correct 217 ms 27140 KB Output is correct
10 Correct 217 ms 26932 KB Output is correct
11 Correct 220 ms 26924 KB Output is correct
12 Correct 211 ms 24696 KB Output is correct
13 Correct 250 ms 25520 KB Output is correct
14 Correct 227 ms 29436 KB Output is correct
15 Correct 272 ms 27612 KB Output is correct
16 Correct 3 ms 5032 KB Output is correct
17 Correct 252 ms 25668 KB Output is correct
18 Correct 208 ms 25508 KB Output is correct
19 Correct 3 ms 5032 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 383 ms 43596 KB Output is correct
22 Correct 382 ms 42628 KB Output is correct
23 Correct 324 ms 36308 KB Output is correct
24 Correct 273 ms 34304 KB Output is correct
25 Correct 308 ms 34988 KB Output is correct
26 Correct 271 ms 35436 KB Output is correct
27 Correct 325 ms 38892 KB Output is correct
28 Correct 308 ms 39760 KB Output is correct
29 Correct 278 ms 34676 KB Output is correct
30 Correct 286 ms 38400 KB Output is correct
31 Correct 256 ms 32684 KB Output is correct
32 Correct 257 ms 32600 KB Output is correct
33 Correct 287 ms 38020 KB Output is correct
34 Correct 247 ms 35744 KB Output is correct
35 Correct 307 ms 40832 KB Output is correct
36 Correct 26 ms 12364 KB Output is correct
37 Correct 335 ms 36188 KB Output is correct
38 Correct 204 ms 28276 KB Output is correct
39 Correct 77 ms 17044 KB Output is correct
40 Correct 112 ms 18268 KB Output is correct
41 Correct 96 ms 13092 KB Output is correct
42 Correct 88 ms 12184 KB Output is correct
43 Correct 97 ms 12616 KB Output is correct
44 Correct 51 ms 11816 KB Output is correct
45 Correct 74 ms 11952 KB Output is correct
46 Correct 58 ms 11972 KB Output is correct
47 Correct 67 ms 11776 KB Output is correct
48 Correct 72 ms 11688 KB Output is correct
49 Correct 67 ms 12224 KB Output is correct
50 Correct 43 ms 11852 KB Output is correct
51 Correct 49 ms 11560 KB Output is correct
52 Correct 42 ms 11744 KB Output is correct
53 Correct 51 ms 11724 KB Output is correct
54 Correct 46 ms 11976 KB Output is correct
55 Correct 42 ms 11188 KB Output is correct
56 Correct 17 ms 8532 KB Output is correct
57 Correct 76 ms 10968 KB Output is correct
58 Correct 39 ms 9732 KB Output is correct
59 Correct 3 ms 5032 KB Output is correct
60 Correct 3 ms 4948 KB Output is correct
61 Correct 653 ms 47668 KB Output is correct
62 Correct 548 ms 46712 KB Output is correct
63 Correct 585 ms 44236 KB Output is correct
64 Correct 438 ms 44284 KB Output is correct
65 Correct 476 ms 46924 KB Output is correct
66 Correct 420 ms 44232 KB Output is correct
67 Correct 390 ms 43776 KB Output is correct
68 Correct 391 ms 43060 KB Output is correct
69 Correct 425 ms 44308 KB Output is correct
70 Correct 351 ms 41552 KB Output is correct
71 Correct 321 ms 42756 KB Output is correct
72 Correct 359 ms 40364 KB Output is correct
73 Correct 344 ms 41336 KB Output is correct
74 Correct 376 ms 44016 KB Output is correct
75 Correct 355 ms 41400 KB Output is correct
76 Correct 26 ms 11980 KB Output is correct
77 Correct 411 ms 35360 KB Output is correct
78 Correct 268 ms 33592 KB Output is correct
79 Correct 3 ms 4948 KB Output is correct
80 Correct 3 ms 5032 KB Output is correct