Submission #1009565

#	Time	Username	Problem	Language	Result	Execution time	Memory
1009565		salmon	City (JOI17_city)	C++14	82 / 100	289 ms	54528 KiB

Encoder

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

static vector<int> adjlst[250100];
static long long int pre[250100];
static long long int post[250100];
static int cont = 0;
static vector<long long int> plow;

static void dfs(int i, int p){
    pre[i] = cont;
    cont++;

    for(int j : adjlst[i]){
        if(j == p) continue;
        dfs(j,i);
    }

    post[i] = lower_bound(plow.begin(),plow.end(),cont - pre[i]) - plow.begin();
    cont = plow[post[i]] + pre[i];
}


void Encode(int N, int A[], int B[]){
	for(int i = 0; i < N - 1; ++i) {
		adjlst[A[i]].push_back(B[i]);
		adjlst[B[i]].push_back(A[i]);
	}

	plow = {1};
	for(int i = 1; i < 400; i++){
        plow.push_back(ceil(plow.back() * 1.05) + 0.1);
	}

	dfs(0,-1);

	for(int i = 0; i < N; i++){
        Code(i,(post[i]<<22)+pre[i]);
	}
}

/*int main(){
    plow = {1};
	for(int i = 1; i < 400; i++){
        plow.push_back(ceil(plow.back() * 1.05) + 0.1);
	}

	printf("%lld",plow[18]);
}*/

Device

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

static vector<long long int> plow;

void InitDevice(){
    plow = {1};
	for(int i = 1; i < 400; i++){
        plow.push_back(ceil(plow.back() * 1.05) + 0.1);
	}
}

int Answer(long long S, long long T){
	long long int s1 = S % (1LL<<22);
	long long int e1 = plow[(S>>22)];
	e1 += s1;
	long long int s2 = T % (1LL<<22);
	long long int e2 = plow[(T>>22)];
	e2 += s2;

	if(s1 <= s2 && e2 <= e1){
        return 1;
	}
	if(s2 <= s1 && e1 <= e2){
        return 0;
	}
    return 2;
}

• Subtask 1: 8 / 8
• Subtask 2: 74 / 92