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Submission #673718

# Submission time Handle Problem Language Result Execution time Memory
673718 2022-12-21T19:22:45 Z stevancv Sorting (IOI15_sorting) C++14
100 / 100
 280 ms 23532 KB 
#include <bits/stdc++.h>
#include "sorting.h"
#define ll long long
#define ld long double
#define sp ' '
#define en '\n'
#define smin(a, b) a = min(a, b)
#define smax(a, b) a = max(a, b)
using namespace std;
const int N = 2e5 + 2;
const int mod = 1e9 + 7;
int findSwapPairs(int n, int s[], int m, int x[], int y[], int p[], int q[]) {
    int zero = 1;
    for (int i = 0; i < n; i++) zero &= s[i] == i;
    if (zero == 1) return 0;
    vector<int> inv(n);
    for (int i = 0; i < n; i++) inv[s[i]] = i;
    auto Can = [&] (int mid) {
      	for (int i = 0; i < m; i++) p[i] = q[i] = 0;
        vector<int> a(n);
        iota(a.begin(), a.end(), 0);
        for (int i = mid; i >= 0; i--) {
            swap(a[x[i]], a[y[i]]);
        }
        vector<int> b(n);
        for (int i = 0; i < n; i++) b[a[i]] = i;
        int j = mid;
        for (int i = 0; i < n; i++) {
            if (b[i] == inv[i]) continue;
            if (j < 0) return 0;
            p[j] = b[i]; q[j--] = inv[i];
            swap(a[b[i]], a[inv[i]]);
            swap(b[i], b[a[b[i]]]);
        }
        vector<int> f(n);
        iota(f.begin(), f.end(), 0);
        vector<int> invf = f;
        for (int i = 0; i <= mid; i++) {
            swap(f[x[i]], f[y[i]]);
            swap(invf[f[x[i]]], invf[f[y[i]]]);
            p[i] = invf[p[i]];
            q[i] = invf[q[i]];
        }
        return 1;
    };
    int l = 0, r = m - 1, ans = m - 1;
    while (l <= r) {
        int mid = l + r >> 1;
        if (Can(mid)) {
            ans = mid;
            r = mid - 1;
        }
        else l = mid + 1;
    }
    Can(ans);
    return ans + 1;
}

Compilation message

sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:48:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   48 |         int mid = l + r >> 1;
      |                   ~~^~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 296 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 296 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 296 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 304 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 296 KB Output is correct
2 Correct 0 ms 296 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 308 KB Output is correct
5 Correct 1 ms 308 KB Output is correct
6 Correct 0 ms 212 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 296 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 296 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 304 KB Output is correct
13 Correct 0 ms 296 KB Output is correct
14 Correct 0 ms 296 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 308 KB Output is correct
17 Correct 1 ms 308 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 0 ms 300 KB Output is correct
21 Correct 2 ms 596 KB Output is correct
22 Correct 2 ms 572 KB Output is correct
23 Correct 2 ms 596 KB Output is correct
24 Correct 2 ms 552 KB Output is correct
25 Correct 2 ms 564 KB Output is correct
26 Correct 2 ms 596 KB Output is correct
27 Correct 2 ms 596 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 480 KB Output is correct
2 Correct 2 ms 468 KB Output is correct
3 Correct 2 ms 440 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 2 ms 468 KB Output is correct
8 Correct 2 ms 468 KB Output is correct
9 Correct 2 ms 488 KB Output is correct
10 Correct 2 ms 440 KB Output is correct
11 Correct 2 ms 468 KB Output is correct
12 Correct 2 ms 468 KB Output is correct
13 Correct 2 ms 468 KB Output is correct
14 Correct 1 ms 468 KB Output is correct

Subtask #6
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 480 KB Output is correct
2 Correct 2 ms 468 KB Output is correct
3 Correct 2 ms 440 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 2 ms 468 KB Output is correct
8 Correct 2 ms 468 KB Output is correct
9 Correct 2 ms 488 KB Output is correct
10 Correct 2 ms 440 KB Output is correct
11 Correct 2 ms 468 KB Output is correct
12 Correct 2 ms 468 KB Output is correct
13 Correct 2 ms 468 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 209 ms 20400 KB Output is correct
16 Correct 233 ms 20860 KB Output is correct
17 Correct 266 ms 22176 KB Output is correct
18 Correct 39 ms 13320 KB Output is correct
19 Correct 188 ms 22676 KB Output is correct
20 Correct 195 ms 23532 KB Output is correct
21 Correct 196 ms 23184 KB Output is correct
22 Correct 206 ms 17392 KB Output is correct
23 Correct 239 ms 22984 KB Output is correct
24 Correct 260 ms 22536 KB Output is correct
25 Correct 269 ms 22376 KB Output is correct
26 Correct 192 ms 23256 KB Output is correct
27 Correct 181 ms 22736 KB Output is correct
28 Correct 250 ms 22560 KB Output is correct
29 Correct 254 ms 22392 KB Output is correct
30 Correct 150 ms 22952 KB Output is correct
31 Correct 267 ms 23004 KB Output is correct
32 Correct 237 ms 22008 KB Output is correct
33 Correct 279 ms 22740 KB Output is correct
34 Correct 251 ms 22432 KB Output is correct
35 Correct 192 ms 22200 KB Output is correct
36 Correct 92 ms 22896 KB Output is correct
37 Correct 280 ms 23372 KB Output is correct
38 Correct 256 ms 22216 KB Output is correct
39 Correct 274 ms 22388 KB Output is correct