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Submission #621125

# Submission time Handle Problem Language Result Execution time Memory
621125 2022-08-03T12:35:41 Z Bench0310 Sorting (IOI15_sorting) C++17
100 / 100
 245 ms 25536 KB 
#include <bits/stdc++.h>
#include "sorting.h"

using namespace std;
typedef long long ll;

int findSwapPairs(int n,int s[],int m,int x[],int y[],int p[],int q[])
{
    auto solve=[&](int mv)->vector<array<int,2>>
    {
        vector<int> f(n,-1);
        for(int i=0;i<n;i++) f[i]=s[i];
        for(int i=0;i<mv;i++) swap(f[x[i]],f[y[i]]);
        vector<bool> vis(n,0);
        vector<array<int,2>> v;
        for(int i=0;i<n;i++)
        {
            if(vis[i]) continue;
            int b=i;
            int a=i;
            while(!vis[a])
            {
                vis[a]=1;
                a=f[a];
                if(!vis[a]) v.push_back({b,a});
            }
        }
        int sz=v.size();
        if(sz<=mv)
        {
            f.assign(n,-1);
            for(int i=0;i<n;i++) f[i]=s[i];
            vector<int> g(n,-1);
            for(int i=0;i<n;i++) g[f[i]]=i;
            vector<array<int,2>> res;
            for(int i=0;i<mv;i++)
            {
                swap(f[x[i]],f[y[i]]);
                swap(g[f[x[i]]],g[f[y[i]]]);
                if(i<sz) res.push_back({g[v[i][0]],g[v[i][1]]});
                else res.push_back({g[0],g[0]});
            }
            return res;
        }
        else return {{-1,-1}};
    };
    int l=-1,r=m;
    while(l<r-1)
    {
        int mv=(l+r)/2;
        auto res=solve(mv);
        if(!(res.size()==1&&res[0][0]==-1)) r=mv;
        else l=mv;
    }
    auto res=solve(r);
    for(int i=0;i<r;i++)
    {
        p[i]=res[i][0];
        q[i]=res[i][1];
    }
    return r;
}

Compilation message

sorting.cpp: In lambda function:
sorting.cpp:28:22: warning: conversion from 'std::vector<std::array<int, 2> >::size_type' {aka 'long unsigned int'} to 'int' may change value [-Wconversion]
   28 |         int sz=v.size();
      |                ~~~~~~^~

Subtask #1
8.0 / 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 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct

Subtask #2
12.0 / 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 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 312 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 212 KB Output is correct

Subtask #4
18.0 / 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 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 312 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 0 ms 304 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 2 ms 584 KB Output is correct
22 Correct 2 ms 596 KB Output is correct
23 Correct 2 ms 596 KB Output is correct
24 Correct 2 ms 596 KB Output is correct
25 Correct 2 ms 596 KB Output is correct
26 Correct 2 ms 596 KB Output is correct
27 Correct 2 ms 596 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 468 KB Output is correct
2 Correct 2 ms 468 KB Output is correct
3 Correct 2 ms 504 KB Output is correct
4 Correct 1 ms 436 KB Output is correct
5 Correct 2 ms 444 KB Output is correct
6 Correct 2 ms 468 KB Output is correct
7 Correct 2 ms 468 KB Output is correct
8 Correct 2 ms 468 KB Output is correct
9 Correct 2 ms 468 KB Output is correct
10 Correct 2 ms 468 KB Output is correct
11 Correct 2 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 2 ms 468 KB Output is correct
14 Correct 1 ms 440 KB Output is correct

Subtask #6
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 468 KB Output is correct
2 Correct 2 ms 468 KB Output is correct
3 Correct 2 ms 504 KB Output is correct
4 Correct 1 ms 436 KB Output is correct
5 Correct 2 ms 444 KB Output is correct
6 Correct 2 ms 468 KB Output is correct
7 Correct 2 ms 468 KB Output is correct
8 Correct 2 ms 468 KB Output is correct
9 Correct 2 ms 468 KB Output is correct
10 Correct 2 ms 468 KB Output is correct
11 Correct 2 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 2 ms 468 KB Output is correct
14 Correct 1 ms 440 KB Output is correct
15 Correct 183 ms 20852 KB Output is correct
16 Correct 214 ms 23664 KB Output is correct
17 Correct 218 ms 24732 KB Output is correct
18 Correct 97 ms 20416 KB Output is correct
19 Correct 182 ms 22692 KB Output is correct
20 Correct 182 ms 23392 KB Output is correct
21 Correct 173 ms 23424 KB Output is correct
22 Correct 167 ms 20240 KB Output is correct
23 Correct 200 ms 25536 KB Output is correct
24 Correct 236 ms 25224 KB Output is correct
25 Correct 245 ms 25016 KB Output is correct
26 Correct 179 ms 21936 KB Output is correct
27 Correct 168 ms 21012 KB Output is correct
28 Correct 215 ms 25084 KB Output is correct
29 Correct 221 ms 24304 KB Output is correct
30 Correct 138 ms 20584 KB Output is correct
31 Correct 237 ms 24836 KB Output is correct
32 Correct 192 ms 24556 KB Output is correct
33 Correct 226 ms 25228 KB Output is correct
34 Correct 202 ms 25172 KB Output is correct
35 Correct 180 ms 22436 KB Output is correct
36 Correct 80 ms 20168 KB Output is correct
37 Correct 224 ms 25340 KB Output is correct
38 Correct 217 ms 24984 KB Output is correct
39 Correct 219 ms 24432 KB Output is correct