Submission #1119988

#	Time	Username	Problem	Language	Result	Execution time	Memory
1119988		ntdaccode	Osumnjičeni (COCI21_osumnjiceni)	C++17	0 / 110	70 ms	41768 KiB

Main

#include<bits/stdc++.h>
#define fori(i,a,b) for(int i=a;i<=b;i++)
#define int long long
#define pb push_back

using namespace std;

typedef pair<int,int> ii;
typedef tuple<int,int,int> tp;

const int M = 1e6 + 10;
const int N = 1e3 + 10;
const int mod = 1e9 + 7;

int n, q, l[M], r[M], up[M][20];

int t[4 * M], lz[4 * M];

void lazy(int s)
{
   t[s * 2] += lz[s];
   t[s * 2 + 1] += lz[s];
   lz[s * 2] += lz[s];
   lz[s * 2 + 1] += lz[s];
   lz[s] = 0;
   return ;
}

void upd(int s,int l,int r,int u,int v,int val)
{
   if(l > v || r < u) return ;
   if(u <= l && r <= v) {
      t[s] += val;
      lz[s] += val;
      return ;
   }
   int mid = (l + r)/2;
   if(l != r && lz[s]) lazy(s);
   upd(s * 2, l, mid, u, v, val);
   upd(s * 2 + 1, mid + 1, r, u, v, val);
   t[s] = max(t[s * 2], t[s * 2 + 1]);
}
int32_t main()
{
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);

  if(fopen("1.inp","r")) {
    freopen("1.inp","r",stdin);
    freopen("1.out","w",stdout);
  }

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

  cin >> n ;
  for(int i = 1;i <= n; i++) {
      cin >> l[i] >> r[i];
  }


  int j = 0;
  for(int i = 1;i <= n; i++) {
      while(j != n && t[1] <= 1) {
         j++;
         upd(1,1,n,l[j],r[j],1);
            //cout << t[1] << " "<< j <<"\n";
      }
      if(t[1] > 1) up[i][0] = j;
      else up[i][0] = j + 1;
      //cout << i << " " << j << "\n";
      upd(1,1,n,l[i],r[i],-1);
  }

  up[n + 1][0] = n + 1;

  for(int j = 1;j <= 18; j++) {
      for(int i = 1;i <= n  + 1; i++) {
         up[i][j] = up[up[i][j - 1]][j - 1];
         //cout << i << " " << j << " " << up[i][j] <<  "\n";
      }
  }

  cin >> q;
  while(q--) {
      int l, r, kq = 0;
      cin >> l >> r;
      for(int i = 18;i >= 0; i--) {
         if(up[l][i] <= r) {
            //cout << i << " " << up[l][i] << "\n";
            kq += (1 << i);
            l = up[l][i];
         }
      }
      cout << kq + 1 << "\n";
  }


}

Compilation message (stderr)

Main.cpp: In function 'int32_t main()':
Main.cpp:50:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   50 |     freopen("1.inp","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~
Main.cpp:51:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   51 |     freopen("1.out","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~
Main.cpp:56:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   56 |     freopen(task".inp","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
Main.cpp:57:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   57 |     freopen(task".out","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 50