oj.uz

Submission #745648

# Submission time Handle Problem Language Result Execution time Memory
745648 2023-05-20T18:12:03 Z Dan4Life Sorting (IOI15_sorting) C++17
20 / 100
 2 ms 476 KB 
#include "sorting.h"
#include <bits/stdc++.h>
using namespace std;
const int mxN = (int)2e5+10;
int n, a[mxN], temp[mxN], x[mxN], y[mxN], pos[mxN], vis[mxN];

void swp(int &i, int &j){
    if(i==j) return; swap(i,j);
    swap(pos[a[i]],pos[a[j]]), swap(a[i],a[j]);
}

int chk(int m, int P[], int Q[]){
    for(int i = 0; i < n; i++)
        a[i] = temp[i], vis[i]=0, pos[a[i]] = i;
    for(int i = 0; i < m; i++)
        swp(x[i],y[i]), P[i]=Q[i]=0;
    int tot = 0;
    for(int i = 0; i < n; i++){
        if(vis[i]) continue;
        vector<int> v; v.clear(); int j = i;
        while(!vis[j]) vis[j]=1, v.push_back(j), j = a[j];
        int s = (int)v.size();
        for(int j = 0; j < s-1; j++)
            swp(v[j],v[j+1]), P[tot] = v[j], Q[tot++] = v[j+1];
    }
    return (is_sorted(a,a+n) and tot<=m)?m:mxN;
}

int findSwapPairs(int N, int A[], int m, int X[], int Y[], int P[], int Q[]) {
    n = N;
    for(int i = 0; i < n; i++)
        a[i] = temp[i] = A[i];
    for(int i = 0; i < m; i++)
        x[i] = X[i], y[i] = Y[i], P[i]=Q[i]=0;
    int l = 0, r = n-1;
    while(l<r){
        int mid = (l+r)/2;
        if(chk(mid,P,Q)<=mid) r=mid;
        else l=mid+1;
    }
    return chk(l,P,Q);
}

Compilation message

sorting.cpp: In function 'void swp(int&, int&)':
sorting.cpp:8:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
    8 |     if(i==j) return; swap(i,j);
      |     ^~
sorting.cpp:8:22: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
    8 |     if(i==j) return; swap(i,j);
      |                      ^~~~
sorting.cpp: In function 'int chk(int, int*, int*)':
sorting.cpp:23:17: warning: declaration of 'j' shadows a previous local [-Wshadow]
   23 |         for(int j = 0; j < s-1; j++)
      |                 ^
sorting.cpp:20:39: note: shadowed declaration is here
   20 |         vector<int> v; v.clear(); int j = i;
      |                                       ^

Subtask #1
8.0 / 8.0

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

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Incorrect 1 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 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 340 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 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Incorrect 1 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 2 ms 476 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 26.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 476 KB Output isn't correct
2 Halted 0 ms 0 KB -