oj.uz

Submission #60191

# Submission time Handle Problem Language Result Execution time Memory
60191 2018-07-23T20:27:11 Z Flugan42 Sorting (IOI15_sorting) C++14
100 / 100
 460 ms 15732 KB 
#include "sorting.h"
#include <bits/stdc++.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
using namespace std;
typedef long long ll;
typedef long double ld;
typedef vector<ll> vi;
typedef pair<ll,ll> ii;
typedef vector<ii> vii;
#define rep(i,a,b) for(int i = a; i < b; i++)
#define per(i,a,b) for(int i = a; i >= b; i--)
#define inf 9223372036854775807
#define all(x) x.begin(),x.end()
#define sz(x) (ll)(x).size()
#define trav(a,x) for(auto& a : x)

int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
  ll lo = -1, hi = N, mid;
  while (lo+1 < hi){
    mid = (lo+hi)/2;
    vi last; last.assign(N,0);
    rep(i,0,N) last[i] = S[i];
    rep(i,0,mid){
      ll t1 = last[X[i]];
      ll t2 = last[Y[i]];
      last[Y[i]] = t1;
      last[X[i]] = t2;
    }
    vi inv; inv.assign(N,0);
    rep(i,0,N) inv[last[i]] = i;
    ll cur = 0;
    rep(i,0,mid){
      while (cur < N && inv[cur] == cur) cur++;
      if (cur == N) break;
      ll s = last[cur],ls = inv[cur];
      last[ls] = s;
      last[cur] = cur;
      inv[cur] = cur;
      inv[s] = ls;
    }
    bool check = true;
    rep(i,0,N) if (inv[i] != i) check = false;
    if (check) {
      hi = mid;
    } else {
      lo = mid;
    }
  }
  if (hi == 0){
    bool check = true;
    rep(i,0,N) if (S[i] != i) check = false;
    if (check) return 0;
    else hi = 1;
  }
  vi last; last.assign(N,0);
  rep(i,0,N) last[i] = S[i];
  rep(i,0,hi){
    ll t1 = last[X[i]];
    ll t2 = last[Y[i]];
    last[Y[i]] = t1;
    last[X[i]] = t2;
  }
  vi inv; inv.assign(N,0);
  rep(i,0,N) inv[last[i]] = i;
  ll cur = 0;
  vii swap;
  rep(i,0,hi){
    while (cur < N && inv[cur] == cur) cur++;
    if (cur == N) break;
    ll s = last[cur],ls = inv[cur];
    swap.push_back(make_pair(s,cur));
    last[ls] = s;
    last[cur] = cur;
    inv[cur] = cur;
    inv[s] = ls;
  }
  while (sz(swap) < hi) swap.push_back(make_pair(0,0));
  last.assign(N,0);
  inv.assign(N,0);
  rep(i,0,N) last[i] = S[i];
  rep(i,0,N) inv[last[i]] = i;
  rep(i,0,hi){
    ll t1 = last[X[i]];
    ll t2 = last[Y[i]];
    last[Y[i]] = t1;
    last[X[i]] = t2;
    inv[t1] = Y[i];
    inv[t2] = X[i];
    //
    P[i] = inv[swap[i].first];
    Q[i] = inv[swap[i].second];
    last[P[i]] = swap[i].second;
    last[Q[i]] = swap[i].first;
    inv[swap[i].first] = Q[i];
    inv[swap[i].second] = P[i];
  }
	return hi;
}

Compilation message

sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:92:29: warning: conversion to 'int' from '__gnu_cxx::__alloc_traits<std::allocator<long long int> >::value_type {aka long long int}' may alter its value [-Wconversion]
     P[i] = inv[swap[i].first];
                             ^
sorting.cpp:93:30: warning: conversion to 'int' from '__gnu_cxx::__alloc_traits<std::allocator<long long int> >::value_type {aka long long int}' may alter its value [-Wconversion]
     Q[i] = inv[swap[i].second];
                              ^
sorting.cpp:99:9: warning: conversion to 'int' from 'll {aka long long int}' may alter its value [-Wconversion]
  return hi;
         ^~
sorting.cpp:19:39: warning: unused parameter 'M' [-Wunused-parameter]
 int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
                                       ^

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 356 KB Output is correct
2 Correct 1 ms 256 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 3 ms 384 KB Output is correct
5 Correct 3 ms 256 KB Output is correct
6 Correct 3 ms 384 KB Output is correct
7 Correct 2 ms 256 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 356 KB Output is correct
2 Correct 1 ms 256 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 3 ms 384 KB Output is correct
5 Correct 3 ms 256 KB Output is correct
6 Correct 3 ms 384 KB Output is correct
7 Correct 2 ms 256 KB Output is correct
8 Correct 3 ms 384 KB Output is correct
9 Correct 2 ms 256 KB Output is correct
10 Correct 2 ms 384 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 2 ms 384 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 2 ms 256 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 356 KB Output is correct
2 Correct 1 ms 256 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 3 ms 384 KB Output is correct
5 Correct 3 ms 256 KB Output is correct
6 Correct 3 ms 384 KB Output is correct
7 Correct 2 ms 256 KB Output is correct
8 Correct 3 ms 384 KB Output is correct
9 Correct 2 ms 256 KB Output is correct
10 Correct 2 ms 384 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 2 ms 384 KB Output is correct
13 Correct 2 ms 256 KB Output is correct
14 Correct 2 ms 256 KB Output is correct
15 Correct 2 ms 384 KB Output is correct
16 Correct 2 ms 384 KB Output is correct
17 Correct 2 ms 384 KB Output is correct
18 Correct 2 ms 256 KB Output is correct
19 Correct 2 ms 256 KB Output is correct
20 Correct 2 ms 384 KB Output is correct
21 Correct 4 ms 512 KB Output is correct
22 Correct 3 ms 384 KB Output is correct
23 Correct 2 ms 512 KB Output is correct
24 Correct 3 ms 432 KB Output is correct
25 Correct 3 ms 384 KB Output is correct
26 Correct 4 ms 512 KB Output is correct
27 Correct 3 ms 484 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 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 3 ms 384 KB Output is correct
5 Correct 3 ms 384 KB Output is correct
6 Correct 3 ms 384 KB Output is correct
7 Correct 4 ms 512 KB Output is correct
8 Correct 4 ms 512 KB Output is correct
9 Correct 3 ms 512 KB Output is correct
10 Correct 5 ms 512 KB Output is correct
11 Correct 4 ms 512 KB Output is correct
12 Correct 4 ms 512 KB Output is correct
13 Correct 4 ms 512 KB Output is correct
14 Correct 3 ms 384 KB Output is correct

Subtask #6
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 3 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 3 ms 384 KB Output is correct
5 Correct 3 ms 384 KB Output is correct
6 Correct 3 ms 384 KB Output is correct
7 Correct 4 ms 512 KB Output is correct
8 Correct 4 ms 512 KB Output is correct
9 Correct 3 ms 512 KB Output is correct
10 Correct 5 ms 512 KB Output is correct
11 Correct 4 ms 512 KB Output is correct
12 Correct 4 ms 512 KB Output is correct
13 Correct 4 ms 512 KB Output is correct
14 Correct 3 ms 384 KB Output is correct
15 Correct 227 ms 14168 KB Output is correct
16 Correct 232 ms 14524 KB Output is correct
17 Correct 356 ms 15092 KB Output is correct
18 Correct 91 ms 8388 KB Output is correct
19 Correct 264 ms 13112 KB Output is correct
20 Correct 340 ms 13376 KB Output is correct
21 Correct 289 ms 13480 KB Output is correct
22 Correct 346 ms 15336 KB Output is correct
23 Correct 247 ms 15472 KB Output is correct
24 Correct 369 ms 15332 KB Output is correct
25 Correct 280 ms 15236 KB Output is correct
26 Correct 191 ms 13392 KB Output is correct
27 Correct 225 ms 12872 KB Output is correct
28 Correct 377 ms 15064 KB Output is correct
29 Correct 343 ms 14964 KB Output is correct
30 Correct 179 ms 11116 KB Output is correct
31 Correct 335 ms 14932 KB Output is correct
32 Correct 362 ms 15064 KB Output is correct
33 Correct 332 ms 15404 KB Output is correct
34 Correct 241 ms 15304 KB Output is correct
35 Correct 266 ms 12860 KB Output is correct
36 Correct 88 ms 9020 KB Output is correct
37 Correct 458 ms 15732 KB Output is correct
38 Correct 460 ms 15156 KB Output is correct
39 Correct 390 ms 15180 KB Output is correct