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Submission #71610

# Submission time Handle Problem Language Result Execution time Memory
71610 2018-08-25T08:34:18 Z mr_banana Sorting (IOI15_sorting) C++17
100 / 100
 252 ms 16376 KB 
#include <bits/stdc++.h>
#include "sorting.h"

using namespace std;
const int MN=2e6+100;
int n,a[MN],m,x[MN],y[MN],b[MN];
bool mark[MN];
bool check(int x1){
    for(int i=0;i<n;i++){
        b[i]=a[i];
        mark[i]=0;
    }
    for(int i=0;i<x1;i++){
        swap(b[x[i]],b[y[i]]);
    }
    int cmp=0;
    for(int i=0;i<n;i++){
        if(!mark[i]){
            int x2=i;
            do{
                mark[x2]=1;
                x2=b[x2];
            }while(x2!=i);
            cmp++;
        }
    }
    return (n-cmp)<=x1;
}
int bs(){
    int lo=-1,hi=m;
    while(hi-lo>1){
        int mid=(hi+lo)/2;
        if(check(mid)){
            hi=mid;
        }
        else{
            lo=mid;
        }
    }
    return hi;
}

int findSwapPairs(int N, int S[], int M, int X[], int Y[], int p[], int q[]) {
    n=N;
    for(int i=0;i<n;i++){
        a[i]=S[i];
    }
    m=M;
    for(int i=0;i<m;i++){
        x[i]=X[i],y[i]=Y[i];
    }
    int r=bs();
    for(int i=0;i<n;i++){
        b[i]=a[i];
    }
    for(int i=0;i<r;i++){
        swap(b[x[i]],b[y[i]]);
    }
    int cnt=0;
    for(int i=0;i<n;i++){
        while(b[i]!=i){
            p[cnt]=i;
            q[cnt]=b[i];
            swap(b[i],b[b[i]]);
            cnt++;
        }
    }
    while(cnt<r){
        p[cnt]=0;
        q[cnt]=0;
        cnt++;
    }
    iota(b,b+n,0);
    iota(a,a+n,0);
    for(int i=r-1;i>=0;i--){
        p[i]=a[p[i]];
        q[i]=a[q[i]];
        swap(a[b[x[i]]],a[b[y[i]]]);
        swap(b[x[i]],b[y[i]]);
    }
    return r;
}

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 3 ms 384 KB Output is correct
4 Correct 3 ms 384 KB Output is correct
5 Correct 4 ms 512 KB Output is correct
6 Correct 3 ms 384 KB Output is correct
7 Correct 2 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 3 ms 384 KB Output is correct
4 Correct 3 ms 384 KB Output is correct
5 Correct 4 ms 512 KB Output is correct
6 Correct 3 ms 384 KB Output is correct
7 Correct 2 ms 384 KB Output is correct
8 Correct 3 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 4 ms 512 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 3 ms 384 KB Output is correct

Subtask #3
16.0 / 16.0

# 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 3 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 3 ms 384 KB Output is correct
6 Correct 3 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 3 ms 384 KB Output is correct
4 Correct 3 ms 384 KB Output is correct
5 Correct 4 ms 512 KB Output is correct
6 Correct 3 ms 384 KB Output is correct
7 Correct 2 ms 384 KB Output is correct
8 Correct 3 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 4 ms 512 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 3 ms 384 KB Output is correct
13 Correct 3 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 384 KB Output is correct
17 Correct 3 ms 384 KB Output is correct
18 Correct 3 ms 384 KB Output is correct
19 Correct 2 ms 384 KB Output is correct
20 Correct 3 ms 384 KB Output is correct
21 Correct 3 ms 640 KB Output is correct
22 Correct 3 ms 640 KB Output is correct
23 Correct 4 ms 640 KB Output is correct
24 Correct 3 ms 640 KB Output is correct
25 Correct 4 ms 640 KB Output is correct
26 Correct 3 ms 640 KB Output is correct
27 Correct 4 ms 768 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 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 4 ms 512 KB Output is correct
5 Correct 3 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 4 ms 640 KB Output is correct
9 Correct 3 ms 512 KB Output is correct
10 Correct 4 ms 512 KB Output is correct
11 Correct 3 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 512 KB Output is correct

Subtask #6
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 4 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 4 ms 512 KB Output is correct
5 Correct 3 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 4 ms 640 KB Output is correct
9 Correct 3 ms 512 KB Output is correct
10 Correct 4 ms 512 KB Output is correct
11 Correct 3 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 512 KB Output is correct
15 Correct 144 ms 13832 KB Output is correct
16 Correct 159 ms 14108 KB Output is correct
17 Correct 214 ms 15224 KB Output is correct
18 Correct 86 ms 11384 KB Output is correct
19 Correct 131 ms 13916 KB Output is correct
20 Correct 170 ms 14444 KB Output is correct
21 Correct 139 ms 14416 KB Output is correct
22 Correct 171 ms 15096 KB Output is correct
23 Correct 179 ms 15384 KB Output is correct
24 Correct 252 ms 15352 KB Output is correct
25 Correct 245 ms 15608 KB Output is correct
26 Correct 173 ms 14328 KB Output is correct
27 Correct 158 ms 13688 KB Output is correct
28 Correct 235 ms 15100 KB Output is correct
29 Correct 223 ms 15196 KB Output is correct
30 Correct 105 ms 13276 KB Output is correct
31 Correct 210 ms 15608 KB Output is correct
32 Correct 160 ms 14840 KB Output is correct
33 Correct 194 ms 15608 KB Output is correct
34 Correct 184 ms 15308 KB Output is correct
35 Correct 143 ms 13788 KB Output is correct
36 Correct 52 ms 12152 KB Output is correct
37 Correct 201 ms 16376 KB Output is correct
38 Correct 205 ms 15480 KB Output is correct
39 Correct 234 ms 15908 KB Output is correct