Submission #988144

#	Time	Username	Problem	Language	Result	Execution time	Memory
988144		GrindMachine	City (JOI17_city)	C++17	30 / 100	362 ms	46280 KiB

Encoder

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

template<typename T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long int ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;

#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define pb push_back
#define endl '\n'
#define sz(a) (int)a.size()
#define setbits(x) __builtin_popcountll(x)
#define ff first
#define ss second
#define conts continue
#define ceil2(x,y) ((x+y-1)/(y))
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define yes cout << "Yes" << endl
#define no cout << "No" << endl

#define rep(i,n) for(int i = 0; i < n; ++i)
#define rep1(i,n) for(int i = 1; i <= n; ++i)
#define rev(i,s,e) for(int i = s; i >= e; --i)
#define trav(i,a) for(auto &i : a)

template<typename T>
void amin(T &a, T b) {
    a = min(a,b);
}

template<typename T>
void amax(T &a, T b) {
    a = max(a,b);
}

// #ifdef LOCAL
// #include "debug.h"
// #else
// #define debug(...) 42
// #endif

/*



*/

const int MOD = 1e9 + 7;
const int N = 3e5 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;

#include "Encoder.h"

vector<ll> adj[N];
vector<ll> tin(N), tout(N);
ll timer = 0;

void dfs1(ll u, ll p){
    tin[u] = timer++;
    trav(v,adj[u]){
        if(v == p) conts;
        dfs1(v,u);
    }
    tout[u] = timer-1;
}

void Encode(int n, int A[], int B[])
{
	// for (int i = 0; i < N; ++i) {
	// 	Code(i, 0LL);
	// }

    rep(i,n-1){
        ll u = A[i], v = B[i];
        adj[u].pb(v), adj[v].pb(u);
    }

    dfs1(0,-1);

    ll mul = 250000;

    rep(i,n){
        ll val = mul*tin[i]-tin[i]*(tin[i]-1)/2;
        val += tout[i]-tin[i];
        // cout << tin[i] << " " << tout[i] << endl;
        // cout << val << endl;
        Code(i,val);
    }
}

Device

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

template<typename T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long int ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;

#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define pb push_back
#define endl '\n'
#define sz(a) (int)a.size()
#define setbits(x) __builtin_popcountll(x)
#define ff first
#define ss second
#define conts continue
#define ceil2(x,y) ((x+y-1)/(y))
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define yes cout << "Yes" << endl
#define no cout << "No" << endl

#define rep(i,n) for(int i = 0; i < n; ++i)
#define rep1(i,n) for(int i = 1; i <= n; ++i)
#define rev(i,s,e) for(int i = s; i >= e; --i)
#define trav(i,a) for(auto &i : a)

template<typename T>
void amin(T &a, T b) {
    a = min(a,b);
}

template<typename T>
void amax(T &a, T b) {
    a = max(a,b);
}

#ifdef LOCAL
#include "debug.h"
#else
#define debug(...) 42
#endif

/*



*/

const int MOD = 1e9 + 7;
const int N = 1e5 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;

#include "Device.h"

void InitDevice()
{

}

int Answer(long long S, long long T)
{
    ll mul = 250000;

    auto get = [&](ll x) -> pll{
        x++;
        ll lo = 0, hi = mul-1;
        ll ti = -1;

        while(lo <= hi){
            ll mid = (lo+hi) >> 1;
            ll sum = mul*(mid+1)-mid*(mid+1)/2;
            if(sum >= x){
                ti = mid;
                hi = mid-1;
            }
            else{
                lo = mid+1;
            }
        }

        // ll sum = 0;
        // rep(ti,mul){
        //     sum += mul-ti;
        //     if(sum >= x){
        //         sum -= mul-ti;
        //         ll tou = ti+x-sum-1;
        //         return {ti,tou};
        //     }
        // }

        ll sum = mul*ti-ti*(ti-1)/2;    
        ll tou = ti+x-sum-1;
        return {ti,tou};
    };

    auto [tin1,tout1] = get(S);
    auto [tin2,tout2] = get(T);
    
    debug(tin1,tout1);
    debug(tin2,tout2);

    if(tin2 <= tin1 and tout2 >= tout1){
        return 0;
    }
    if(tin1 <= tin2 and tout1 >= tout2){
        return 1;
    }	
    return 2;
}

Compilation message (stderr)

Device.cpp: In function 'int Answer(long long int, long long int)':
Device.cpp:46:20: warning: statement has no effect [-Wunused-value]
   46 | #define debug(...) 42
      |                    ^~
Device.cpp:106:5: note: in expansion of macro 'debug'
  106 |     debug(tin1,tout1);
      |     ^~~~~
Device.cpp:46:20: warning: statement has no effect [-Wunused-value]
   46 | #define debug(...) 42
      |                    ^~
Device.cpp:107:5: note: in expansion of macro 'debug'
  107 |     debug(tin2,tout2);
      |     ^~~~~

• Subtask 1: 8 / 8
• Subtask 2: 22 / 92