Submission #893100

#	Time	Username	Problem	Language	Result	Execution time	Memory
893100		Trisanu_Das	Digital Circuit (IOI22_circuit)	C++17	52 / 100	629 ms	26572 KiB

circuit

#include "circuit.h"
#include<bits/stdc++.h>
using namespace std;
long long l[800100], r[800100], v[800100], cont[800100], lz[800100], mod = 1000002022, po[200100], dep[200100], st[200100], nn;
void pd(int n) {
  if(lz[n]){
    v[n]=cont[n]-v[n];
    lz[n]=0;
    if(l[n]!=r[n]) lz[n*2]^=1,lz[n*2+1]^=1;
  }
}
void build(int i, int L, int R) {
  l[i] = L;
  r[i] = R;
  if(L==R) {
    cont[i] = po[nn-dep[L+nn]];
    v[i] = st[L]*cont[i];
  } else {
    build(i*2,L,L+R>>1);
    build(i*2+1,L+R+2>>1, R);
    cont[i] = cont[i*2]+cont[i*2+1];
    v[i] = v[i*2]+v[i*2+1];
  }
}
void update(int i, int tl, int tr) {
  if(tl<=l[i]&&r[i]<=tr) 
    lz[i]^=1, tr=-1;
  pd(i);
  if(l[i]>tr||tl>r[i])
    return;
  update(i*2,tl,tr);
  update(i*2+1,tl,tr);
  v[i] = v[i*2]+v[i*2+1];
}
void init(int N, int M, vector<int> P, vector<int> A) {
  nn=N;
  for(int i = 0; i < M; i++)
    st[i] = A[i];
  for(int i = 1; i < N+M; i++)
    dep[i] = 1+dep[P[i]];
  po[0] = 1;
  for(int i = 1; i <= N; i++)
    po[i] = po[i-1]*2%mod;
  build(1,0,M-1);
}
int count_ways(int L, int R) {
  update(1,L-nn,R-nn);
  return v[1]%mod;
}

Compilation message (stderr)

circuit.cpp: In function 'void build(int, int, int)':
circuit.cpp:19:18: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   19 |     build(i*2,L,L+R>>1);
      |                 ~^~
circuit.cpp:20:20: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   20 |     build(i*2+1,L+R+2>>1, R);
      |                 ~~~^~

• Subtask 1: 2 / 2
• Subtask 2: 7 / 7
• Subtask 3: 0 / 9
• Subtask 4: 4 / 4
• Subtask 5: 12 / 12
• Subtask 6: 27 / 27
• Subtask 7: 0 / 28
• Subtask 8: 0 / 11