oj.uz

Submission #800404

# Submission time Handle Problem Language Result Execution time Memory
800404 2023-08-01T14:18:59 Z Dan4Life Sorting (IOI15_sorting) C++17
20 / 100
 1 ms 340 KB 
//#include "sorting.h"
#include <bits/stdc++.h>
using namespace std;
const int mxN = (int)2e5+10;
int n, tot, a[mxN], t[mxN], x[mxN], y[mxN], p[mxN], vis[mxN];
 
int chk(int m, int P[], int Q[]){
    for(int i = 0; i < n; i++) a[i] = t[i], vis[i]=0;
    for(int i = 0; i < m; i++) swap(a[x[i]],a[y[i]]), P[i]=Q[i]=0;
    for(int i = 0; i < n; i++) p[a[i]]=i;
    tot = 0; fill(vis,vis+n,0);
    for(int i = 0; i < n; i++){
		if(vis[i]) continue; 
        int j = i; vector<int> v; v.clear();
		while(!vis[j]){
            vis[j] = 1; if(vis[p[j]]) break; 
            P[tot]=j,Q[tot++]=p[j], j = p[j];
        }
    }
    return (tot<=m)?m:mxN;
}
 
int findSwapPairs(int N, int A[], int m, int X[], int Y[], int P[], int Q[]) {
    n = N;
    if(is_sorted(A,A+n)) return 0;
    for(int i = 0; i < n; i++){
        a[i] = t[i] = A[i];
        x[i] = X[i], y[i] = Y[i];
    }
    int l = 0, r = n;
    while(l<r){
        int mid = (l+r)/2;
        if(chk(mid,P,Q)<=mid) r=mid;
        else l=mid+1;
    }
    m = l;
    for(int i = 0; i < n; i++) a[i] = t[i], vis[i]=0;
    for(int i = 0; i < m; i++) swap(a[x[i]],a[y[i]]), P[i]=Q[i]=0;
    for(int i = 0; i < n; i++) p[a[i]]=i;
    tot = 0; fill(vis,vis+n,0);
    for(int i = 0; i < n; i++){
		if(vis[i]) continue; 
        int j = i; vector<int> v; v.clear();
		while(!vis[j]){
            vis[j] = 1; if(vis[p[j]]) break; 
            P[tot]=j,Q[tot++]=p[j], j = p[j];
        }
    }
    return l;
}

Subtask #1
8.0 / 8.0

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

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 236 KB Output is correct
2 Incorrect 0 ms 340 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 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 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 0 ms 236 KB Output is correct
14 Incorrect 0 ms 340 KB Output isn't correct
15 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 340 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 26.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 340 KB Output isn't correct
2 Halted 0 ms 0 KB -