Submission #739520

#	Time	Username	Problem	Language	Result	Execution time	Memory
739520		Trunkty	Digital Circuit (IOI22_circuit)	C++17	100 / 100	1286 ms	57560 KiB

circuit

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
//#define int ll

#include "circuit.h"

ll n,m,mod=1000002022;
vector<ll> roads[200005];
ll comb[200005],val[200005],pref[200005],suff[200005];
map<ll,ll> todfs[200005];
ll sumi[800005],segtree[800005];
ll lazy[800005];

void build(ll node, ll l, ll r){
    if(l==r){
        sumi[node] = val[l];
    }
    else{
        ll mid = (l+r)/2;
        build(node*2,l,mid);
        build(node*2+1,mid+1,r);
        sumi[node] = sumi[node*2]+sumi[node*2+1];
        sumi[node] %= mod;
    }
}

void pushdown(ll node, ll l, ll r){
    if(lazy[node]){
        segtree[node] = sumi[node]-segtree[node];
        segtree[node] += mod;
        segtree[node] %= mod;
        if(l!=r){
            lazy[node*2] ^= 1;
            lazy[node*2+1] ^= 1;
        }
        lazy[node] = 0;
    }
}

void update(ll node, ll l, ll r, ll needl, ll needr){
    pushdown(node,l,r);
    if(l>needr or r<needl){
        return;
    }
    else if(l>=needl and r<=needr){
        lazy[node] ^= 1;
        pushdown(node,l,r);
    }
    else{
        ll mid = (l+r)/2;
        update(node*2,l,mid,needl,needr);
        update(node*2+1,mid+1,r,needl,needr);
        pushdown(node*2,l,mid);
        pushdown(node*2+1,mid+1,r);
        segtree[node] = segtree[node*2]+segtree[node*2+1];
        segtree[node] %= mod;
    }
}

void dfs1(ll x){
    comb[x] = 1;
    if(x>=n){
        return;
    }
    for(ll i:roads[x]){
        dfs1(i);
        comb[x] *= comb[i];
        comb[x] %= mod;
    }
    comb[x] *= roads[x].size();
    comb[x] %= mod;
}

void dfs2(ll x, ll c){
    if(x>=n){
        val[x] = c;
        return;
    }
    pref[0] = 1;
    for(ll i=1;i<=roads[x].size();i++){
        pref[i] = comb[roads[x][i-1]]*pref[i-1];
        pref[i] %= mod;
    }
    suff[roads[x].size()+1] = 1;
    for(ll i=roads[x].size();i>=1;i--){
        suff[i] = comb[roads[x][i-1]]*suff[i+1];
        suff[i] %= mod;
    }
    for(ll i=1;i<=roads[x].size();i++){
        todfs[x][roads[x][i-1]] = (((pref[i-1]*suff[i+1])%mod)*c)%mod;
    }
    for(ll i:roads[x]){
        dfs2(i,todfs[x][i]);
    }
}

void init(int N, int M, vector<int> p, vector<int> a){
    n = N;
    m = M;
    for(ll i=1;i<=n+m-1;i++){
        roads[p[i]].push_back(i);
    }
    dfs1(0);
    dfs2(0,1);
    build(1,0,n+m-1);
    for(ll i=0;i<a.size();i++){
        if(a[i]){
            update(1,0,n+m-1,i+n,i+n);
        }
    }
}

int count_ways(int l, int r){
    update(1,0,n+m-1,l,r);
    return segtree[1];
}

Compilation message (stderr)

circuit.cpp: In function 'void dfs2(ll, ll)':
circuit.cpp:81:17: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   81 |     for(ll i=1;i<=roads[x].size();i++){
      |                ~^~~~~~~~~~~~~~~~~
circuit.cpp:90:17: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   90 |     for(ll i=1;i<=roads[x].size();i++){
      |                ~^~~~~~~~~~~~~~~~~
circuit.cpp: In function 'void init(int, int, std::vector<int>, std::vector<int>)':
circuit.cpp:107:17: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  107 |     for(ll i=0;i<a.size();i++){
      |                ~^~~~~~~~~

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