Submission #971599

#	Time	Username	Problem	Language	Result	Execution time	Memory
971599		nguyentunglam	Abracadabra (CEOI22_abracadabra)	C++17	0 / 100	3050 ms	28032 KiB

Main

#include<bits/stdc++.h>
#define all(v) v.begin(), v.end()
#define endl "\n"
using namespace std;

const int N = 1e5 + 10;

int n, q;

int a[N], b[N], c[N], ans[N];

vector<pair<int, int> > query[N];

int32_t main() {
  #define task ""

  cin.tie(0) -> sync_with_stdio(0);

  if (fopen("task.inp", "r")) {
    freopen("task.inp", "r", stdin);
    freopen("task.out", "w", stdout);
  }

  if (fopen(task".inp", "r")) {
    freopen (task".inp", "r", stdin);
    freopen (task".out", "w", stdout);
  }

  cin >> n >> q;

  for(int i = 1; i <= n; i++) cin >> a[i];

  for(int i = 1; i <= q; i++) {
    int t, x; cin >> t >> x;
    query[min(n, t)].emplace_back(x, i);
  }

  b[n / 2 + 1] = c[n / 2 + 1] = 1e9;
  for(int turn = 0; turn <= n; turn++) {
//    for(int i = 1; i <= n; i++) cout << a[i] << " "; cout << endl;
    for(auto &[x, i] : query[turn]) {
      ans[i] = a[x];
    }
    for(int i = 1; i <= n / 2; i++) b[i] = a[i];
    for(int i = n / 2 + 1; i <= n; i++) c[i - n / 2] = a[i];
//    for(int i = 1; i <= n / 2; i++) cout << b[i] << " "; cout << endl;
//    for(int i = 1; i <= n / 2; i++) cout << c[i] << " "; cout << endl;
    for(int i = 1, j = 1; i <= n / 2 || j <= n / 2; ) {
      if (b[i] < c[j]) a[i + j - 1] = b[i], i++;
      else a[i + j - 1] = c[j], j++;
    }
//    for(int i = 1; i <= n; i++) cout << a[i] << " "; cout << endl;
  }

  for(int i = 1; i <= q; i++) cout << ans[i] << endl;
}

Compilation message (stderr)

Main.cpp: In function 'int32_t main()':
Main.cpp:20:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |     freopen("task.inp", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:21:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |     freopen("task.out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:25:13: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   25 |     freopen (task".inp", "r", stdin);
      |     ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:26:13: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   26 |     freopen (task".out", "w", stdout);
      |     ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 40
• Subtask 3: 0 / 25
• Subtask 4: 0 / 25