Submission #790069

#	Time	Username	Problem	Language	Result	Execution time	Memory
790069		Andrey	Digital Circuit (IOI22_circuit)	C++17	0 / 100	3068 ms	37340 KiB

circuit

#include "circuit.h"
#include<bits/stdc++.h>
using namespace std;

long long n,m;
vector<long long> p2(300001);
vector<long long> haha[300001];
vector<long long> st(300001);
vector<long long> wow(300001);
vector<long long> no(300001);
vector<long long> sum(800001);
vector<long long> idk(800001);
vector<long long> val(800001);
const long long MOD = 1e9+2022;

void build(long long l, long long r, long long x) {
    if(l == r) {
        sum[x] = wow[l+n];
        if(no[l]) {
            val[x] = sum[l];
        }
        else {
            val[x] = 0;
        }
        idk[x] = 0;
        return;
    }
    long long mid = (l+r)/2;
    build(l,mid,x*2+1);
    build(mid+1,r,x*2+2);
    sum[x] = (sum[x*2+1]+sum[x*2+2])%MOD;
    val[x] = (val[x*2+1]+val[x*2+2])%MOD;
}

void upd(long long l, long long r, long long ql, long long qr, long long x) {
    if(l == ql && r == qr) {
        idk[x]++;
        idk[x]%=2;
        val[x] = (sum[x]-val[x]+MOD)%MOD;
        return;
    }
    long long mid = (l+r)/2;
    if(qr <= mid) {
        upd(l,mid,ql,qr,x*2+1);
    }
    else if(ql >= mid+1) {
        upd(mid+1,r,ql,qr,x*2+2);
    }
    else {
        upd(l,mid,ql,mid,x*2+1);
        upd(mid+1,r,mid+1,qr,x*2+2);
    }
    val[x] = (val[x*2+1]+val[x*2+2])%MOD;
    if(idk[x]%2) {
        val[x] = (sum[x]-val[x]+MOD)%MOD;
    }
}

void dfs(long long a) {
    long long sb = 0;
    if(a < n) {
        sb = 1;
    }
    for(long long v: haha[a]) {
        dfs(v);
        sb+=st[v];
    }
    st[a] = sb;
}

void dude(long long a) {
    if(!haha[a].empty()) {
        wow[haha[a][0]] = wow[a]+st[haha[a][1]];
        wow[haha[a][1]] = wow[a]+st[haha[a][0]];
        dude(haha[a][0]);
        dude(haha[a][1]);
    }
}

void init(int N, int M, vector<int> p, vector<int> a) {
    n = N;
    m = M;
    p2[0] = 1;
    for(long long i = 1; i < 300000; i++) {
        p2[i] = (p2[i-1]*2)%MOD;
    }
    for(long long i = 1; i < n+m; i++) {
        haha[p[i]].push_back(i);
    }
    dfs(0);
    dude(0);
    for(int i = n; i < n+m; i++) {
        wow[i] = p2[wow[i]];
    }
    for(int i = 0; i < a.size(); i++) {
        no[i] = a[i];
    }
    build(0,m-1,0);
}

int count_ways(int l, int r) {
    upd(0,m-1,l-n,r-n,0);
    return val[0];
}

Compilation message (stderr)

circuit.cpp: In function 'void init(int, int, std::vector<int>, std::vector<int>)':
circuit.cpp:95:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   95 |     for(int i = 0; i < a.size(); i++) {
      |                    ~~^~~~~~~~~~

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