oj.uz

Submission #705390

# Submission time Handle Problem Language Result Execution time Memory
705390 2023-03-04T08:36:29 Z bin9638 Sorting (IOI15_sorting) C++17
100 / 100
 209 ms 28284 KB 
#include <bits/stdc++.h>

using namespace std;

#define ll long long
#define fs first
#define sc second
#define N 1000010
#define pb push_back
#define ii pair<ll,ll>

int a[N],ktr[N],f[N],pos[N];
vector<ii>tv;

void DFS(int u)
{
    ktr[u]=1;
    if(ktr[a[u]]==0)
        DFS(a[u]);
}

int findSwapPairs(int n, int s[], int m, int x[], int y[], int p[], int q[])
{
    int res=-1,l=0,r=m;
    while(l<=r)
    {
        int mid=(l+r)/2;
       // cout<<mid<<endl;
        for(int i=0;i<n;i++)
            a[i]=s[i];
        for(int i=0;i<mid;i++)
            swap(a[x[i]],a[y[i]]);
        memset(ktr,0,sizeof(ktr));
        int cnt=n;
        for(int i=0;i<n;i++)
            if(ktr[i]==0)
            {
                cnt--;
                DFS(i);
            }
        if(cnt<=mid)
        {
            //cout<<"cc\n";
            r=mid-1;
            res=mid;
            for(int i=0;i<n;i++)
                f[i]=a[i];
        }else
            l=mid+1;
    }
   // for(int i=0;i<n;i++)cout<<f[i]<<" ";cout<<endl;
    for(int i=0;i<n;i++)
        pos[f[i]]=i;
    for(int i=0;i<n;i++)
        if(f[i]!=i)
        {
            int t=f[i];
           // cout<<i<<" "<<t<<endl;
            tv.pb({i,t});
            swap(f[i],f[pos[i]]);
            swap(pos[i],pos[t]);
        }
   // for(int i=0;i<n;i++)cout<<f[i]<<" ";cout<<endl;
    for(int i=0;i<n;i++)
    {
        a[i]=s[i];
        pos[a[i]]=i;
    }
    for(int i=0;i<res;i++)
    {
        if(i+1>tv.size())
        {
            p[i]=0;
            q[i]=0;
            swap(a[x[i]],a[y[i]]);
            swap(pos[a[x[i]]],pos[a[y[i]]]);
            continue;
        }
       // cout<<"cc\n"<<endl;
        swap(a[x[i]],a[y[i]]);
        swap(pos[a[x[i]]],pos[a[y[i]]]);
        int u=pos[tv[i].fs],v=pos[tv[i].sc];
        p[i]=u;
        q[i]=v;
        swap(a[u],a[v]);
        swap(pos[a[u]],pos[a[v]]);
    }
    #ifdef SKY
    for(int i=0;i<res;i++)cout<<p[i]<<" "<<q[i]<<endl;
    for(int i=0;i<n;i++)cout<<a[i]<<" ";cout<<endl;
    #endif // SKY
    return res;
}

#ifdef SKY
int main()
{
    freopen("A.inp","r",stdin);
    freopen("A.out","w",stdout);
    int n;
    cin>>n;
    int s[n];
    for(int i=0;i<n;i++)
        cin>>s[i];
    int m;
    cin>>m;
    int x[m],y[m],p[m],q[m];
    for(int i=0;i<m;i++)
    {
        cin>>x[i]>>y[i];
       // cout<<x[i]<<" "<<y[i]<<endl;
    }
    cout<<findSwapPairs(n,s,m,x,y,p,q);
    return 0;
}
#endif // SKY

Compilation message

sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:71:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   71 |         if(i+1>tv.size())
      |            ~~~^~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4180 KB Output is correct
2 Correct 2 ms 4180 KB Output is correct
3 Correct 3 ms 4188 KB Output is correct
4 Correct 3 ms 4180 KB Output is correct
5 Correct 3 ms 4180 KB Output is correct
6 Correct 5 ms 4180 KB Output is correct
7 Correct 3 ms 4148 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4180 KB Output is correct
2 Correct 2 ms 4180 KB Output is correct
3 Correct 3 ms 4188 KB Output is correct
4 Correct 3 ms 4180 KB Output is correct
5 Correct 3 ms 4180 KB Output is correct
6 Correct 5 ms 4180 KB Output is correct
7 Correct 3 ms 4148 KB Output is correct
8 Correct 3 ms 4180 KB Output is correct
9 Correct 3 ms 4180 KB Output is correct
10 Correct 3 ms 4180 KB Output is correct
11 Correct 3 ms 4180 KB Output is correct
12 Correct 3 ms 4180 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4152 KB Output is correct
2 Correct 3 ms 4180 KB Output is correct
3 Correct 3 ms 4180 KB Output is correct
4 Correct 3 ms 4180 KB Output is correct
5 Correct 4 ms 4180 KB Output is correct
6 Correct 3 ms 4180 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4180 KB Output is correct
2 Correct 2 ms 4180 KB Output is correct
3 Correct 3 ms 4188 KB Output is correct
4 Correct 3 ms 4180 KB Output is correct
5 Correct 3 ms 4180 KB Output is correct
6 Correct 5 ms 4180 KB Output is correct
7 Correct 3 ms 4148 KB Output is correct
8 Correct 3 ms 4180 KB Output is correct
9 Correct 3 ms 4180 KB Output is correct
10 Correct 3 ms 4180 KB Output is correct
11 Correct 3 ms 4180 KB Output is correct
12 Correct 3 ms 4180 KB Output is correct
13 Correct 3 ms 4152 KB Output is correct
14 Correct 3 ms 4180 KB Output is correct
15 Correct 3 ms 4180 KB Output is correct
16 Correct 3 ms 4180 KB Output is correct
17 Correct 4 ms 4180 KB Output is correct
18 Correct 3 ms 4180 KB Output is correct
19 Correct 3 ms 4156 KB Output is correct
20 Correct 4 ms 4180 KB Output is correct
21 Correct 4 ms 4436 KB Output is correct
22 Correct 4 ms 4436 KB Output is correct
23 Correct 5 ms 4420 KB Output is correct
24 Correct 4 ms 4416 KB Output is correct
25 Correct 4 ms 4420 KB Output is correct
26 Correct 4 ms 4436 KB Output is correct
27 Correct 4 ms 4436 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4308 KB Output is correct
2 Correct 4 ms 4436 KB Output is correct
3 Correct 6 ms 4436 KB Output is correct
4 Correct 5 ms 4308 KB Output is correct
5 Correct 4 ms 4360 KB Output is correct
6 Correct 4 ms 4308 KB Output is correct
7 Correct 4 ms 4436 KB Output is correct
8 Correct 4 ms 4424 KB Output is correct
9 Correct 4 ms 4376 KB Output is correct
10 Correct 4 ms 4436 KB Output is correct
11 Correct 4 ms 4436 KB Output is correct
12 Correct 5 ms 4436 KB Output is correct
13 Correct 4 ms 4436 KB Output is correct
14 Correct 4 ms 4292 KB Output is correct

Subtask #6
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4308 KB Output is correct
2 Correct 4 ms 4436 KB Output is correct
3 Correct 6 ms 4436 KB Output is correct
4 Correct 5 ms 4308 KB Output is correct
5 Correct 4 ms 4360 KB Output is correct
6 Correct 4 ms 4308 KB Output is correct
7 Correct 4 ms 4436 KB Output is correct
8 Correct 4 ms 4424 KB Output is correct
9 Correct 4 ms 4376 KB Output is correct
10 Correct 4 ms 4436 KB Output is correct
11 Correct 4 ms 4436 KB Output is correct
12 Correct 5 ms 4436 KB Output is correct
13 Correct 4 ms 4436 KB Output is correct
14 Correct 4 ms 4292 KB Output is correct
15 Correct 137 ms 25428 KB Output is correct
16 Correct 153 ms 25916 KB Output is correct
17 Correct 162 ms 27152 KB Output is correct
18 Correct 67 ms 19392 KB Output is correct
19 Correct 126 ms 23800 KB Output is correct
20 Correct 137 ms 24684 KB Output is correct
21 Correct 140 ms 24792 KB Output is correct
22 Correct 130 ms 22452 KB Output is correct
23 Correct 145 ms 27960 KB Output is correct
24 Correct 168 ms 27600 KB Output is correct
25 Correct 163 ms 27260 KB Output is correct
26 Correct 134 ms 24688 KB Output is correct
27 Correct 118 ms 23700 KB Output is correct
28 Correct 161 ms 27240 KB Output is correct
29 Correct 151 ms 26472 KB Output is correct
30 Correct 99 ms 22528 KB Output is correct
31 Correct 167 ms 26948 KB Output is correct
32 Correct 150 ms 27168 KB Output is correct
33 Correct 159 ms 27636 KB Output is correct
34 Correct 196 ms 27480 KB Output is correct
35 Correct 129 ms 23756 KB Output is correct
36 Correct 56 ms 20544 KB Output is correct
37 Correct 166 ms 28284 KB Output is correct
38 Correct 209 ms 27292 KB Output is correct
39 Correct 170 ms 27464 KB Output is correct