oj.uz

Submission #70140

# Submission time Handle Problem Language Result Execution time Memory
70140 2018-08-22T11:46:27 Z Vahan Sorting (IOI15_sorting) C++17
100 / 100
 187 ms 16432 KB 
#include "sorting.h"
#include<algorithm>
#include<vector>
#include<iostream>
using namespace std;
vector<pair<int,int> > v;
int n,ps[300000],s[300000],x[300000],y[300000],rev_ps[300000],r[300000];
int qayl_qan()
{
    int q=0;
    for(int i=0;i<n;i++)
        rev_ps[ps[i]]=i;
    for(int i=0;i<n;i++)
    {
        if(ps[rev_ps[i]]==ps[i])
            continue;
        int e=ps[i];
        swap(ps[rev_ps[i]],ps[i]);
        q++;
        swap(rev_ps[i],rev_ps[e]);
    }
    return q;
}
int stug(int e)
{
    for(int i=0;i<n;i++)
        ps[i]=s[i];
    for(int i=0;i<=e;i++)
        swap(ps[x[i]],ps[y[i]]);
    if(qayl_qan()<=e+1)
        return 1;
    else
        return 0;
}
int bin(int l,int r)
{
    if(l==r)
        return r;
    int mid=(l+r)/2;
    if(stug(mid))
        bin(l,mid);
    else
        bin(mid+1,r);
}
int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
    if(M>=N)
        M=N-1;
    for(int i=0;i<N;i++)
        s[i]=S[i];
    for(int i=0;i<M;i++)
    {
        x[i]=X[i];
        y[i]=Y[i];
    }
    n=N;
    for(int i=0;i<n;i++)
        ps[i]=s[i];
    if(qayl_qan()==0)
        return 0;
    int t=bin(0,M-1);
    t++;
    for(int i=0;i<n;i++)
        ps[i]=s[i];
    for(int i=0;i<t;i++)
        swap(ps[x[i]],ps[y[i]]);
    for(int i=0;i<n;i++)
        rev_ps[ps[i]]=i;
    for(int i=0;i<n;i++)
    {
        if(ps[rev_ps[i]]==ps[i])
            continue;
        int e=ps[i];
        swap(ps[rev_ps[i]],ps[i]);
        v.push_back({ps[i],e});
        swap(rev_ps[i],rev_ps[e]);
    }
    for(int i=0;i<n;i++)
        r[s[i]]=i;
    for(int i=0;i<t;i++)
    {
        swap(s[x[i]],s[y[i]]);
        swap(r[s[x[i]]],r[s[y[i]]]);
        if(v.size()>i)
        {
            P[i]=r[v[i].first];
            Q[i]=r[v[i].second];
        }
        else
        {
            P[i]=0;
            Q[i]=0;
        }
        swap(s[P[i]],s[Q[i]]);
        swap(r[s[P[i]]],r[s[Q[i]]]);
    }
	return t;
}

Compilation message

sorting.cpp: In function 'int bin(int, int)':
sorting.cpp:35:20: warning: declaration of 'r' shadows a global declaration [-Wshadow]
 int bin(int l,int r)
                    ^
sorting.cpp:7:63: note: shadowed declaration is here
 int n,ps[300000],s[300000],x[300000],y[300000],rev_ps[300000],r[300000];
                                                               ^
sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:83:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if(v.size()>i)
            ~~~~~~~~^~
sorting.cpp: In function 'int bin(int, int)':
sorting.cpp:44:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 3 ms 384 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 3 ms 384 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 3 ms 384 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 3 ms 384 KB Output is correct
8 Correct 3 ms 384 KB Output is correct
9 Correct 3 ms 384 KB Output is correct
10 Correct 3 ms 384 KB Output is correct
11 Correct 3 ms 356 KB Output is correct
12 Correct 2 ms 384 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 3 ms 384 KB Output is correct
4 Correct 2 ms 412 KB Output is correct
5 Correct 3 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 3 ms 384 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 3 ms 384 KB Output is correct
8 Correct 3 ms 384 KB Output is correct
9 Correct 3 ms 384 KB Output is correct
10 Correct 3 ms 384 KB Output is correct
11 Correct 3 ms 356 KB Output is correct
12 Correct 2 ms 384 KB Output is correct
13 Correct 2 ms 384 KB Output is correct
14 Correct 2 ms 384 KB Output is correct
15 Correct 3 ms 384 KB Output is correct
16 Correct 2 ms 412 KB Output is correct
17 Correct 3 ms 384 KB Output is correct
18 Correct 2 ms 384 KB Output is correct
19 Correct 2 ms 384 KB Output is correct
20 Correct 2 ms 384 KB Output is correct
21 Correct 3 ms 484 KB Output is correct
22 Correct 3 ms 512 KB Output is correct
23 Correct 4 ms 512 KB Output is correct
24 Correct 3 ms 484 KB Output is correct
25 Correct 3 ms 512 KB Output is correct
26 Correct 4 ms 512 KB Output is correct
27 Correct 4 ms 512 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 512 KB Output is correct
2 Correct 3 ms 512 KB Output is correct
3 Correct 3 ms 512 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 4 ms 512 KB Output is correct
6 Correct 3 ms 512 KB Output is correct
7 Correct 3 ms 512 KB Output is correct
8 Correct 3 ms 512 KB Output is correct
9 Correct 4 ms 512 KB Output is correct
10 Correct 4 ms 512 KB Output is correct
11 Correct 4 ms 512 KB Output is correct
12 Correct 3 ms 512 KB Output is correct
13 Correct 3 ms 512 KB Output is correct
14 Correct 3 ms 484 KB Output is correct

Subtask #6
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 512 KB Output is correct
2 Correct 3 ms 512 KB Output is correct
3 Correct 3 ms 512 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 4 ms 512 KB Output is correct
6 Correct 3 ms 512 KB Output is correct
7 Correct 3 ms 512 KB Output is correct
8 Correct 3 ms 512 KB Output is correct
9 Correct 4 ms 512 KB Output is correct
10 Correct 4 ms 512 KB Output is correct
11 Correct 4 ms 512 KB Output is correct
12 Correct 3 ms 512 KB Output is correct
13 Correct 3 ms 512 KB Output is correct
14 Correct 3 ms 484 KB Output is correct
15 Correct 126 ms 14708 KB Output is correct
16 Correct 111 ms 14824 KB Output is correct
17 Correct 165 ms 15736 KB Output is correct
18 Correct 42 ms 8952 KB Output is correct
19 Correct 169 ms 13044 KB Output is correct
20 Correct 153 ms 13528 KB Output is correct
21 Correct 157 ms 13644 KB Output is correct
22 Correct 120 ms 15892 KB Output is correct
23 Correct 129 ms 16156 KB Output is correct
24 Correct 187 ms 15964 KB Output is correct
25 Correct 145 ms 15764 KB Output is correct
26 Correct 149 ms 13520 KB Output is correct
27 Correct 148 ms 13036 KB Output is correct
28 Correct 172 ms 15712 KB Output is correct
29 Correct 173 ms 15080 KB Output is correct
30 Correct 112 ms 12064 KB Output is correct
31 Correct 182 ms 15436 KB Output is correct
32 Correct 143 ms 15720 KB Output is correct
33 Correct 172 ms 15932 KB Output is correct
34 Correct 154 ms 15976 KB Output is correct
35 Correct 147 ms 13036 KB Output is correct
36 Correct 51 ms 10492 KB Output is correct
37 Correct 180 ms 16432 KB Output is correct
38 Correct 170 ms 15720 KB Output is correct
39 Correct 168 ms 15848 KB Output is correct