Submission #155997

#	Time	Username	Problem	Language	Result	Execution time	Memory
155997		ASDF123	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++14	30 / 100	3039 ms	26520 KiB

sortbooks

#include <bits/stdc++.h>
//#define int long long
#define fr first
#define sc second
#define all(s) s.begin(), s.end()
#define szof(s) (int)s.size()
using namespace std;

const int N = (int)1e6 + 5;
const int INF = 1e9 + 7;
const int MOD = (int)1e9 + 7;

int tests = 1;
int n, l, r, k;
int a[N];
int tree[N * 4], pref[N];

void build(int v = 1, int tl = 1, int tr = N) {
  if (tl == tr) {
    tree[v] = a[tl];
    return;
  }
  int mid = tl + tr >> 1;
  build(v + v, tl, mid);
  build(v + v + 1, mid + 1, tr);
  tree[v] = min(tree[v + v], tree[v + v + 1]);
}

int get(int l, int r, int v = 1, int tl = 1, int tr = N) {
  if (l <= tl && tr <= r) {
    return tree[v];
  }
  if (l > tr || tl > r) {
    return INF;
  }
  int mid = tl + tr >> 1;
  return min(get(l, r, v + v, tl, mid), get(l, r, v + v + 1, mid + 1, tr));
}

int bad(int l, int r) {
  return pref[r - 1] - pref[l - 1];
}


void solve() {
  scanf("%d%d%d", &l, &r, &k);

  if (k < get(l, r)) {
    if (bad(l, r)) {
      puts("0");
    } else {
      puts("1");
    }
    return;
  }

  set <int> st;
  set <int> ::iterator it;
  bool ok = true;
  int mn = INF;

  for (int i = r; i >= l; i--) {
    if (i == r) {
      st.insert(a[i]);
      mn = min(mn, a[i]);
      continue;
    }
    if (mn < a[i]) {
      it = st.lower_bound(a[i]);
      it--;
      if (*it + a[i] > k) {
        ok = false;
        break;
      }
    }
    st.insert(a[i]);
    mn = min(mn, a[i]);
  }

  if (ok) {
    puts("1");
  } else {
    puts("0");
  }
}

main() {
  scanf("%d%d", &n, &tests);
  for (int i = 1; i <= n; i++) {
    scanf("%d", &a[i]);
  }
  build();

  for (int i = 1; i <= n; i++) {
    pref[i] = pref[i - 1] + (a[i] > a[i + 1]);
  }

//  for (int i = 1; i <= n; i++) {
//    cout << pref[i] << " ";
//  }cout << endl;
//
//  while (1) {
//    int l, r;
//    cin >> l >> r;
//    cout << get(l, r) << endl;
//  }


  while (tests--) {
    solve();
  }
}

Compilation message (stderr)

sortbooks.cpp: In function 'void build(int, int, int)':
sortbooks.cpp:23:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   int mid = tl + tr >> 1;
             ~~~^~~~
sortbooks.cpp: In function 'int get(int, int, int, int, int)':
sortbooks.cpp:36:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   int mid = tl + tr >> 1;
             ~~~^~~~
sortbooks.cpp: At global scope:
sortbooks.cpp:87:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main() {
      ^
sortbooks.cpp: In function 'void solve()':
sortbooks.cpp:46:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d", &l, &r, &k);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~
sortbooks.cpp: In function 'int main()':
sortbooks.cpp:88:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &n, &tests);
   ~~~~~^~~~~~~~~~~~~~~~~~~~
sortbooks.cpp:90:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &a[i]);
     ~~~~~^~~~~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 9 / 9
• Subtask 3: 13 / 13
• Subtask 4: 0 / 17
• Subtask 5: 0 / 30
• Subtask 6: 0 / 23