Submission #962470

#	Time	Username	Problem	Language	Result	Execution time	Memory
962470		steveonalex	Rail (IOI14_rail)	C++17	8 / 100	46 ms	640 KiB

rail

#include <bits/stdc++.h>
#include "rail.h"
 
using namespace std;
 
typedef long long ll;
typedef unsigned long long ull;
 
#define ALL(v) (v).begin(), (v).end()
#define MASK(i) (1LL << (i))
#define GETBIT(mask, i) (((mask) >> (i)) & 1)
 
// mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
mt19937_64 rng(1);
ll rngesus(ll l, ll r){return ((ull) rng()) % (r - l + 1) + l;}
 
ll max(ll a, ll b){return (a > b) ? a : b;}
ll min(ll a, ll b){return (a < b) ? a : b;}
 
ll LASTBIT(ll mask){return mask & (-mask);}
ll pop_cnt(ll mask){return __builtin_popcountll(mask);}
ll ctz(ll mask){return __builtin_ctzll(mask);}
ll clz(ll mask){return __builtin_clzll(mask);}
ll logOf(ll mask){return 63 - clz(mask);}
 
template <class T1, class T2>
    bool minimize(T1 &a, T2 b){
        if (a > b){a = b; return true;}
        return false;
    }
template <class T1, class T2>
    bool maximize(T1 &a, T2 b){
        if (a < b){a = b; return true;}
        return false;
    }
template <class T>
    void printArr(T& a, string separator = " ", string finish = "\n"){
        for(auto i: a) cout << i << separator;
        cout << finish;
    }
template <class T>
    void remove_dup(vector<T> &a){
        sort(ALL(a));
        a.resize(unique(ALL(a)) - a.begin());
    }

// int getDistance(int i, int j){
//     cout << "? " << i << " " << j << endl;
//     int verdict; cin >> verdict;
//     return verdict;
// }

void findLocation(int n, int first, int location[], int stype[]){
    for(int i = 0; i<n; ++i) location[i] = stype[i] = 0;
    location[0] = first; stype[0] = 1;

    vector<int> from0(n);
    for(int i = 1; i<n; ++i){
        from0[i] = getDistance(0, i);
    }

    vector<int> sigma(n);
    for(int i= 0; i<n; ++i) sigma[i] = i;

    sort(ALL(sigma), [&from0](int x, int y){return from0[x] < from0[y];});

    // printArr(sigma);

    int l = 0, r = sigma[1];
    stype[l] = 1; stype[r] = 2;
    location[l] = first, location[r] = first + from0[r];
    for(int i: sigma){
        if (i == l || i == r) continue;
        int x = getDistance(l, i), y = getDistance(r, i);
        if (x < y){
            location[i] = location[l] + x;
            stype[i] = 2;
            r = i;
        }
        else{
            location[i] = location[r] - y;
            stype[i] = 1;
            if (location[l] < location[i]) l = i;
        }
    }

}


// int main(void){
//     ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

//     int n = 4;
//     int location[n], stype[n];
//     findLocation(n, 1, location, stype);
//     for(int i = 0; i<n; ++i) cout << location[i] << " " << stype[i] << "\n";

//     return 0;
// }

• Subtask 1: 8 / 8
• Subtask 2: 0 / 22
• Subtask 3: 0 / 26
• Subtask 4: 0 / 44