oj.uz

Submission #669753

# Submission time Handle Problem Language Result Execution time Memory
669753 2022-12-07T08:17:16 Z alvingogo Sorting (IOI15_sorting) C++14
0 / 100
 1 ms 340 KB 
#include <bits/stdc++.h>
#pragma GCC optimize("Ofast")
#define AquA cin.tie(0);ios_base::sync_with_stdio(0);
#define fs first
#define sc second
#define p_q priority_queue
using namespace std;

int findSwapPairs(int N,int S[],int M,int X[],int Y[],int P[],int Q[]){
    int l=0,r=M;
    int n=N;
    while(r>l){
        int m=(l+r)/2;
        vector<int> v(n);
        iota(v.begin(),v.end(),0);
        for(int i=0;i<m;i++){
            swap(v[X[i]],v[Y[i]]);
        }
        vector<int> g(n);
        for(int i=0;i<n;i++){
            g[v[i]]=S[i];
        }
        vector<int> vis(n);
        int cnt=0;
        for(int i=0;i<n;i++){
            if(!vis[i]){
                cnt++;
                vis[i]=1;
                int a=i;
                while(1){
                    a=g[a];
                    if(vis[a]){
                        break;
                    }
                    vis[a]=1;
                }
            }
        }
        int t=n-cnt;
        if(t<=m){
            r=m;
        }
        else{
            l=m+1;
        }
    }
    vector<int> v(n);
    iota(v.begin(),v.end(),0);
    for(int i=0;i<l;i++){
        swap(v[X[i]],v[Y[i]]);
    }
    vector<int> d(n),e(n);
    for(int i=0;i<n;i++){
        d[S[i]]=i;
        e[v[i]]=i;
        //g[v[i]]={S[i],i};
    }
    vector<int> vis(n);
    int cnt=0;
    int c=0,cn=0;
    for(int i=0;i<l;i++){
        {
            int t=d[X[i]],f=e[Y[i]];
            swap(d[S[t]],d[S[f]]);
            swap(S[t],S[f]);
            swap(e[v[t]],e[v[f]]);
            swap(v[t],v[f]);
        }
        while(cn<n){
            if(d[cn]!=e[cn]){
                int t=d[cn],f=e[cn];
                swap(d[S[t]],d[S[f]]);
                swap(S[t],S[f]);
                P[c]=t;
                Q[c]=f;
                assert(d[cn]==e[cn]);
                c++;             
                cn++;
                break;
            }
            cn++;
        }
    }
    assert(c==l);
    return l;
}

Compilation message

sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:59:9: warning: unused variable 'cnt' [-Wunused-variable]
   59 |     int cnt=0;
      |         ^~~

Subtask #1
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 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 Incorrect 0 ms 212 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 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 Incorrect 0 ms 212 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Incorrect 1 ms 212 KB Output isn't correct
4 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 1 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 Incorrect 0 ms 212 KB Output isn't correct
6 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 -