oj.uz

Submission #1040181

# Submission time Handle Problem Language Result Execution time Memory
1040181 2024-07-31T17:44:41 Z Zicrus Sorting (IOI15_sorting) C++17
74 / 100
 1000 ms 18776 KB 
#pragma GCC optimize("O3","unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,popcnt,lzcnt")

#include <bits/stdc++.h>
#include "sorting.h"
using namespace std;
 
typedef int ll;
 
int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P1[], int Q1[]) {
    vector<ll> h(N);
    for (int i = 0; i < N; i++) h[i] = S[i];
 
    ll ooo = 0;
    for (int i = 0; i < N; i++) {
        if (h[i] != i) ooo++;
    }
    if (ooo == 0) return 0;
    
vector<int> P(N), Q(N); //
 
    vector<ll> revH(N);
    for (int i = 0; i < N; i++) {
        revH[h[i]] = i;
    }
 
    ll res1 =0;
    ll low = 1, high = N;
    while (low < high) {
        ll g = max((low + high) / 2, high - 20000);
 
        ll res = 0;
        vector<ll> s = h;
        vector<ll> order = s;
        vector<ll> revOrd = revH, revS = revH;
        for (int j = 0; j < g; j++) {
            swap(order[X[j]], order[Y[j]]);
            swap(revOrd[order[X[j]]], revOrd[order[Y[j]]]);
        }
        int id1 = -1;
        for (int i = 0; i < g; i++) {
            swap(s[X[i]], s[Y[i]]);
            swap(revS[s[X[i]]], revS[s[Y[i]]]);
            int firstOut = -1, id = -1;
            for (int j = id1+1; j < N; j++) {
                if (order[j] != j) {
                    firstOut = order[id = j];
                    break;
                }
            }
            id1 = id;
            if (firstOut == -1) {
                P[res] = Q[res] = 0;
                res++;
            }
            else {
                ll iter = revOrd[id];
                ll v = order[iter];
 
                ll id1 = revS[firstOut];
                ll id2 = revS[v];
                swap(s[id1], s[id2]);
                swap(revS[s[id1]], revS[s[id2]]);
                swap(order[iter], order[id]);
                swap(revOrd[order[iter]], revOrd[order[id]]);
                P[res] = id1;
                Q[res] = id2;
                res++;
            }
        }
        ll ooo = 0;
        for (int i = g; i < N; i++) {
            if (s[i] != i) ooo++;
        }
        if (ooo == 0) {
            res1 = res;
            high = res;
 
            for (int i = 0; i < res; i++) {
                P1[i] = P[i];
                Q1[i] = Q[i];
            }
        }else {
            low = g+1;
        }
    }
	return res1;
}

Compilation message

sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:60:20: warning: declaration of 'id1' shadows a previous local [-Wshadow]
   60 |                 ll id1 = revS[firstOut];
      |                    ^~~
sorting.cpp:40:13: note: shadowed declaration is here
   40 |         int id1 = -1;
      |             ^~~
sorting.cpp:71:12: warning: declaration of 'ooo' shadows a previous local [-Wshadow]
   71 |         ll ooo = 0;
      |            ^~~
sorting.cpp:14:8: note: shadowed declaration is here
   14 |     ll ooo = 0;
      |        ^~~
sorting.cpp:10:39: warning: unused parameter 'M' [-Wunused-parameter]
   10 | int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P1[], int Q1[]) {
      |                                   ~~~~^

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 440 KB Output is correct
12 Correct 0 ms 348 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 440 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 344 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 604 KB Output is correct
22 Correct 1 ms 604 KB Output is correct
23 Correct 1 ms 600 KB Output is correct
24 Correct 1 ms 604 KB Output is correct
25 Correct 1 ms 604 KB Output is correct
26 Correct 1 ms 604 KB Output is correct
27 Correct 1 ms 568 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 604 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 0 ms 604 KB Output is correct
6 Correct 1 ms 604 KB Output is correct
7 Correct 1 ms 628 KB Output is correct
8 Correct 1 ms 512 KB Output is correct
9 Correct 1 ms 600 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 1 ms 604 KB Output is correct
12 Correct 1 ms 604 KB Output is correct
13 Correct 1 ms 604 KB Output is correct
14 Correct 2 ms 604 KB Output is correct

Subtask #6
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 604 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 0 ms 604 KB Output is correct
6 Correct 1 ms 604 KB Output is correct
7 Correct 1 ms 628 KB Output is correct
8 Correct 1 ms 512 KB Output is correct
9 Correct 1 ms 600 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 1 ms 604 KB Output is correct
12 Correct 1 ms 604 KB Output is correct
13 Correct 1 ms 604 KB Output is correct
14 Correct 2 ms 604 KB Output is correct
15 Correct 135 ms 16548 KB Output is correct
16 Correct 141 ms 16532 KB Output is correct
17 Correct 154 ms 18776 KB Output is correct
18 Correct 32 ms 10488 KB Output is correct
19 Execution timed out 1047 ms 16408 KB Time limit exceeded
20 Halted 0 ms 0 KB -