oj.uz

Submission #259610

# Submission time Handle Problem Language Result Execution time Memory
259610 2020-08-08T04:11:07 Z dvdg6566 Secret Permutation (RMI19_permutation) C++14
53.1429 / 100
 42 ms 384 KB 
#include "permutation.h"
#include<bits/stdc++.h>
using namespace std;
typedef vector<int> vi;
const int MAXN = 300;
#define pb push_back
#define SZ(x) (int)x.size()

int firsts[MAXN];
int mids[MAXN];
int K;
int R[MAXN];

int find_diff(int pivot,int a,int b){
  vi V;
  V.pb(a);V.pb(b);V.pb(pivot);
  for(int i=1;i<=K;++i){
    if(i!=a&&i!=b&&i!=pivot)V.pb(i);
  }
  int k=query(V);
  V.clear();
  V.pb(b);V.pb(a);V.pb(pivot);
  for(int i=1;i<=K;++i){
    if(i!=a&&i!=b&&i!=pivot)V.pb(i);
  }
  int p=query(V);
  return k-p;
}

void solve(int N) {
  K=N;
  for(int i=1;i+2<=N;++i){
    firsts[i]=find_diff(i,i+1,i+2);
    // cerr<<"F "<<i<<' '<<firsts[i]<<'\n';
  }
  for(int i=2;i+1<=N;++i){
    mids[i]=find_diff(i,i-1,i+1);
    // cerr<<"M "<<i<<' '<<mids[i]<<'\n';
  }

  vi ans;
  for(int i=1;i<=N;++i)for(int j=1;j<=N;++j){
    if(i==j)continue; 
    ans.clear();
    ans.pb(i);
    ans.pb(j);
    bool fail=0;
    while(SZ(ans)<N){
      // cerr<<"Length "<<SZ(ans)<<'\n';
      int lastdif=abs(ans[SZ(ans)-1] - ans[SZ(ans)-2]);
      // cerr<<lastdif<<'\n';
      int otdiff=abs(firsts[SZ(ans)-1]+lastdif);
      // cout<<otdiff<<'\n';
      int stdiff=abs(mids[SZ(ans)]+lastdif);
      // cout<<stdiff<<'\n';
      int a=ans[SZ(ans)-2];
      int b=ans[SZ(ans)-1];
      if(otdiff == stdiff+lastdif){
        if(a>b)ans.pb(a-otdiff);
        else ans.pb(a+otdiff);
      }else if(stdiff == otdiff+lastdif){
        // closer to first one
        if(a>b)ans.pb(a+otdiff);
        else ans.pb(a-otdiff);
      }else if(otdiff + stdiff == lastdif){
        if(a>b)ans.pb(a-otdiff);
        else ans.pb(a+otdiff);
      }else{
        fail=1;break;
      }
    }
    for(auto i:ans)if(i>N||i<1)fail=1;
    if(!fail){
      memset(R,0,sizeof(R));
      for(auto i:ans){
        if(R[i])fail=1;
        R[i]=1;
      }
    }
    // cerr<<fail<<'\n';
    if(fail==0){answer(ans);return;}
  }

  
  answer(ans);
}

Compilation message

stub.cpp: In function 'int query(int*)':
stub.cpp:15:9: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   fscanf(stdin, "%d", &x);
   ~~~~~~^~~~~~~~~~~~~~~~~
stub.cpp: In function 'int main(int, char**)':
stub.cpp:48:9: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   fscanf(stdin, "%d", &N);
   ~~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
7.971435 / 15.0

# Verdict Execution time Memory Grader output
1 Partially correct 1 ms 256 KB Partially correct
2 Partially correct 0 ms 256 KB Partially correct
3 Partially correct 1 ms 256 KB Partially correct
4 Partially correct 0 ms 256 KB Partially correct
5 Partially correct 1 ms 256 KB Partially correct
6 Partially correct 0 ms 256 KB Partially correct

Subtask #2
18.600015 / 35.0

# Verdict Execution time Memory Grader output
1 Partially correct 1 ms 256 KB Partially correct
2 Partially correct 0 ms 256 KB Partially correct
3 Partially correct 1 ms 256 KB Partially correct
4 Partially correct 0 ms 256 KB Partially correct
5 Partially correct 1 ms 256 KB Partially correct
6 Partially correct 0 ms 256 KB Partially correct
7 Partially correct 3 ms 256 KB Partially correct
8 Partially correct 3 ms 256 KB Partially correct
9 Partially correct 3 ms 256 KB Partially correct
10 Partially correct 3 ms 256 KB Partially correct
11 Partially correct 3 ms 256 KB Partially correct
12 Partially correct 3 ms 256 KB Partially correct
13 Partially correct 3 ms 256 KB Partially correct
14 Partially correct 3 ms 256 KB Partially correct
15 Partially correct 5 ms 256 KB Partially correct
16 Partially correct 3 ms 256 KB Partially correct

Subtask #3
26.57145 / 50.0

# Verdict Execution time Memory Grader output
1 Partially correct 1 ms 256 KB Partially correct
2 Partially correct 0 ms 256 KB Partially correct
3 Partially correct 1 ms 256 KB Partially correct
4 Partially correct 0 ms 256 KB Partially correct
5 Partially correct 1 ms 256 KB Partially correct
6 Partially correct 0 ms 256 KB Partially correct
7 Partially correct 3 ms 256 KB Partially correct
8 Partially correct 3 ms 256 KB Partially correct
9 Partially correct 3 ms 256 KB Partially correct
10 Partially correct 3 ms 256 KB Partially correct
11 Partially correct 3 ms 256 KB Partially correct
12 Partially correct 3 ms 256 KB Partially correct
13 Partially correct 3 ms 256 KB Partially correct
14 Partially correct 3 ms 256 KB Partially correct
15 Partially correct 5 ms 256 KB Partially correct
16 Partially correct 3 ms 256 KB Partially correct
17 Partially correct 34 ms 256 KB Partially correct
18 Partially correct 36 ms 256 KB Partially correct
19 Partially correct 42 ms 256 KB Partially correct
20 Partially correct 38 ms 384 KB Partially correct
21 Partially correct 33 ms 256 KB Partially correct
22 Partially correct 33 ms 256 KB Partially correct
23 Partially correct 33 ms 384 KB Partially correct
24 Partially correct 36 ms 256 KB Partially correct
25 Partially correct 38 ms 308 KB Partially correct
26 Partially correct 36 ms 256 KB Partially correct