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Submission #420355

# Submission time Handle Problem Language Result Execution time Memory
420355 2021-06-08T10:05:11 Z Aldas25 Sorting (IOI15_sorting) C++14
100 / 100
 535 ms 24320 KB 
#include "sorting.h"
#include <bits/stdc++.h>

using namespace std;

#define FAST_IO ios_base::sync_with_stdio(0); cin.tie(nullptr)
#define FOR(i, a, b) for (int i = (a); i <= (b); i++)
#define REP(n) FOR(O, 1, (n))
#define f first
#define s second
#define pb push_back
typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<pii> vii;
typedef vector<ll> vl;

const int MAXN = 200100;

int ids[MAXN];
int vals[MAXN];
int whereId[MAXN], whereVal[MAXN];
vii valSwaps;

int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
    bool isSorted = true;
    FOR(i, 0, N-1) if (S[i] != i) isSorted = false;
    if (isSorted) return 0;



    int le = 1, ri = M;
    while (le < ri) {
        int mid = (le+ri)/2;

        FOR(i, 0, mid-1) P[i] = Q[i] = 0;

        FOR(i, 0, N-1) {
            ids[i] = i;
            vals[i] = S[i];
            whereId[i] = i;
            whereVal[S[i]] = i;
        }

        FOR(i, 0, mid-1) {
            int a = X[i], b = Y[i];
            int id1 = whereId[a], id2 = whereId[b];
            swap(whereId[a], whereId[b]);
            swap(ids[id1], ids[id2]);
        }

       // cout << " after enemy swaps:";
       // FOR(i, 0, N-1) cout << " " << ids[i];
       // cout << endl;

        valSwaps.clear();
        FOR(i,0,N-2) {
            int val1 = vals[i], val2 = ids[i];
            if (val1 == val2) continue;
            int id1 = i, id2 = whereVal[val2];
            swap(vals[id1], vals[id2]);
            swap(whereVal[val1], whereVal[val2]);
            valSwaps.pb({val1, val2});
        }

       // cout << " valSwaps:" << endl;
       // for (auto pp : valSwaps) cout << "    " << pp.f << ", " << pp.s << endl;

        FOR(i, 0, N-1) {
            ids[i] = i;
            vals[i] = S[i];
            whereId[i] = i;
            whereVal[S[i]] = i;
        }

        FOR(i, 0, (int)valSwaps.size()-1) {
            int a = X[i], b = Y[i];
            int id1 = whereId[a], id2 = whereId[b];
            swap(whereId[a], whereId[b]);
            swap(ids[id1], ids[id2]);

            a = valSwaps[i].f, b = valSwaps[i].s;
            id1 = whereVal[a], id2 = whereVal[b];
            swap(vals[id1], vals[id2]);
            swap(whereVal[a], whereVal[b]);
            P[i] = ids[id1];
            Q[i] = ids[id2];
        }

        if ((int)valSwaps.size() <= mid) ri = mid;
        else le = mid+1;
    }

    FOR(i, 0, le-1) P[i] = Q[i] = 0;

    FOR(i, 0, N-1) {
        ids[i] = i;
        vals[i] = S[i];
        whereId[i] = i;
        whereVal[S[i]] = i;
    }

    FOR(i, 0, le-1) {
        int a = X[i], b = Y[i];
        int id1 = whereId[a], id2 = whereId[b];
        swap(whereId[a], whereId[b]);
        swap(ids[id1], ids[id2]);
    }

   // cout << " after enemy swaps:";
   // FOR(i, 0, N-1) cout << " " << ids[i];
   // cout << endl;

    valSwaps.clear();
    FOR(i,0,N-2) {
        int val1 = vals[i], val2 = ids[i];
        if (val1 == val2) continue;
        int id1 = i, id2 = whereVal[val2];
        swap(vals[id1], vals[id2]);
        swap(whereVal[val1], whereVal[val2]);
        valSwaps.pb({val1, val2});
    }

   // cout << " valSwaps:" << endl;
   // for (auto pp : valSwaps) cout << "    " << pp.f << ", " << pp.s << endl;

    FOR(i, 0, N-1) {
        ids[i] = i;
        vals[i] = S[i];
        whereId[i] = i;
        whereVal[S[i]] = i;
    }

    FOR(i, 0, (int)valSwaps.size()-1) {
        int a = X[i], b = Y[i];
        int id1 = whereId[a], id2 = whereId[b];
        swap(whereId[a], whereId[b]);
        swap(ids[id1], ids[id2]);

        a = valSwaps[i].f, b = valSwaps[i].s;
        id1 = whereVal[a], id2 = whereVal[b];
        swap(vals[id1], vals[id2]);
        swap(whereVal[a], whereVal[b]);
        P[i] = ids[id1];
        Q[i] = ids[id2];
    }

    return le;
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 300 KB Output is correct
6 Correct 1 ms 296 KB Output is correct
7 Correct 1 ms 300 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 300 KB Output is correct
6 Correct 1 ms 296 KB Output is correct
7 Correct 1 ms 300 KB Output is correct
8 Correct 1 ms 296 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 204 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 300 KB Output is correct
6 Correct 1 ms 296 KB Output is correct
7 Correct 1 ms 300 KB Output is correct
8 Correct 1 ms 296 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 2 ms 588 KB Output is correct
22 Correct 2 ms 584 KB Output is correct
23 Correct 2 ms 588 KB Output is correct
24 Correct 2 ms 588 KB Output is correct
25 Correct 2 ms 588 KB Output is correct
26 Correct 2 ms 588 KB Output is correct
27 Correct 2 ms 588 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 440 KB Output is correct
2 Correct 2 ms 460 KB Output is correct
3 Correct 3 ms 460 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 2 ms 460 KB Output is correct
6 Correct 2 ms 460 KB Output is correct
7 Correct 2 ms 460 KB Output is correct
8 Correct 2 ms 460 KB Output is correct
9 Correct 3 ms 440 KB Output is correct
10 Correct 3 ms 460 KB Output is correct
11 Correct 2 ms 500 KB Output is correct
12 Correct 2 ms 460 KB Output is correct
13 Correct 2 ms 460 KB Output is correct
14 Correct 1 ms 460 KB Output is correct

Subtask #6
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 440 KB Output is correct
2 Correct 2 ms 460 KB Output is correct
3 Correct 3 ms 460 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 2 ms 460 KB Output is correct
6 Correct 2 ms 460 KB Output is correct
7 Correct 2 ms 460 KB Output is correct
8 Correct 2 ms 460 KB Output is correct
9 Correct 3 ms 440 KB Output is correct
10 Correct 3 ms 460 KB Output is correct
11 Correct 2 ms 500 KB Output is correct
12 Correct 2 ms 460 KB Output is correct
13 Correct 2 ms 460 KB Output is correct
14 Correct 1 ms 460 KB Output is correct
15 Correct 282 ms 21464 KB Output is correct
16 Correct 349 ms 21956 KB Output is correct
17 Correct 472 ms 23112 KB Output is correct
18 Correct 46 ms 13380 KB Output is correct
19 Correct 301 ms 22356 KB Output is correct
20 Correct 302 ms 22964 KB Output is correct
21 Correct 332 ms 22964 KB Output is correct
22 Correct 288 ms 18548 KB Output is correct
23 Correct 312 ms 24172 KB Output is correct
24 Correct 483 ms 23588 KB Output is correct
25 Correct 458 ms 23308 KB Output is correct
26 Correct 322 ms 22464 KB Output is correct
27 Correct 250 ms 21624 KB Output is correct
28 Correct 421 ms 23460 KB Output is correct
29 Correct 413 ms 22852 KB Output is correct
30 Correct 203 ms 20920 KB Output is correct
31 Correct 441 ms 23452 KB Output is correct
32 Correct 312 ms 23216 KB Output is correct
33 Correct 535 ms 23676 KB Output is correct
34 Correct 384 ms 23624 KB Output is correct
35 Correct 295 ms 21940 KB Output is correct
36 Correct 79 ms 19740 KB Output is correct
37 Correct 485 ms 24320 KB Output is correct
38 Correct 442 ms 23316 KB Output is correct
39 Correct 459 ms 23576 KB Output is correct