oj.uz

Submission #315298

# Submission time Handle Problem Language Result Execution time Memory
315298 2020-10-22T09:46:03 Z juggernaut Sorting (IOI15_sorting) C++14
0 / 100
 1 ms 640 KB 
#include"sorting.h"
#include<bits/stdc++.h>
//#include"grader.cpp"
using namespace std;
int n,s[800005],x[800005],y[800005],tmp[800005],pos[800005];
vector<pair<int,int>>res;
bool check(int m){
    int i;
    for(i=0;i<n;i++)tmp[i]=s[i];
    for(i=0;i<m;i++)swap(tmp[x[i]],tmp[y[i]]);
    for(i=0;i<n;i++)pos[tmp[i]]=i;
    vector<pair<int,int>>sw;
    res.clear();
    for(i=0;i<n;i++){
        if(pos[i]==i)continue;
        sw.push_back({tmp[i],tmp[pos[i]]});
        swap(tmp[pos[i]],tmp[i]);
        swap(pos[tmp[pos[i]]],pos[tmp[i]]);
    }
    if(sw.size()>m)return 0;
    for(i=0;i<n;i++)tmp[i]=s[i],pos[tmp[i]]=i;
    for(i=0;i<sw.size();i++){
        swap(tmp[x[i]],tmp[y[i]]);
        swap(pos[tmp[x[i]]],pos[tmp[y[i]]]);
        res.push_back({pos[sw[i].first],pos[sw[i].second]});
        swap(tmp[pos[sw[i].first]],tmp[pos[sw[i].second]]);
        swap(pos[tmp[pos[sw[i].first]]],pos[tmp[pos[sw[i].second]]]);
    }
    for(;i<m;i++)res.push_back({0,0});
    return 1;
}
int findSwapPairs(int N,int S[],int m,int X[],int Y[],int P[],int Q[]){
    n=N;
    int i;
    for(i=0;i<n;i++)s[i]=S[i];
    for(i=0;i<m;i++)x[i]=X[i];
    for(i=0;i<m;i++)y[i]=Y[i];
    int need=0,l=0;
    for(i=0;i<n;i++)tmp[i]=s[i],pos[tmp[i]]=i;
    for(i=0;i<n;i++)if(pos[i]!=i)need++;
    if(need){
        for(i=0;i<m;i++){
            if(pos[tmp[x[i]]]!=tmp[x[i]])need--;
            if(pos[tmp[y[i]]]!=tmp[y[i]])need--;
            swap(tmp[x[i]],tmp[y[i]]);
            swap(pos[tmp[x[i]]],pos[tmp[y[i]]]);
            if(pos[tmp[x[i]]]!=tmp[x[i]])need++;
            if(pos[tmp[y[i]]]!=tmp[y[i]])need++;
            if(need<=i+1){
                l=i+1;
                break;
            }
        }
    }
    check(l);
    for(i=0;i<l;i++)P[i]=res[i].first,Q[i]=res[i].second;
    return l;
}

Compilation message

sorting.cpp: In function 'bool check(int)':
sorting.cpp:20:17: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   20 |     if(sw.size()>m)return 0;
      |        ~~~~~~~~~^~
sorting.cpp:22:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |     for(i=0;i<sw.size();i++){
      |             ~^~~~~~~~~~

Subtask #1
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Incorrect 1 ms 384 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Incorrect 1 ms 384 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Incorrect 1 ms 384 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 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Incorrect 1 ms 384 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 640 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 640 KB Output isn't correct
2 Halted 0 ms 0 KB -