Submission #587868

#	Time	Username	Problem	Language	Result	Execution time	Memory
587868		FatihSolak	Rail (IOI14_rail)	C++17	30 / 100	82 ms	12296 KiB

rail

#include "rail.h"
#include <bits/stdc++.h>
#define N 5005
using namespace std;
int d[N][N];
int get(int i,int j){
    if(i > j)swap(i,j);
    if(i == j)return 0;
    if(d[i][j])
        return d[i][j];
    return d[i][j] = getDistance(i,j);
}
void findLocation(int n, int first, int location[], int stype[])
{
    for(int i = 0;i<n;i++){
        location[i] = -1;
        stype[i] = -1;
    }
    location[0] = first;
    stype[0] = 1;
    if(n == 1)return;
    vector<pair<int,int>> v;
    for(int i = 0;i<n;i++){
        if(i == 0)continue;
        v.push_back({get(0,i),i});
    }
    sort(v.begin(),v.end());
    int last = v[0].second;
    int x = last;
    location[last] = v[0].first + first;
    stype[last] = 2;
    int delta = 1e9;
    for(int i = 0;i<n;i++){
        if(i == x)continue;
        delta = min(delta,get(x,i));
    }
    for(int i = 1;i<v.size();i++){
        if(get(x,v[i].second) - 2*delta == get(0,v[i].second) - get(0,x)){
            last = v[i].second;
            location[last] = v[i].first + first;
            stype[last] = 2;
        }
    } 
    // for(int i = 0;i<n;i++){
    //     cout << location[i] << " " << stype[i] << endl;
    // }
    // cout << endl;
    v.clear();
    for(int i = 0;i<n;i++){
        if(i == last)continue;
        v.push_back({get(last,i),i});
    }
    sort(v.begin(),v.end());
    int frst = v[0].second;
    location[frst] = location[last]-v[0].first;
    stype[frst] = 1;
    for(int i = 1;i<v.size();i++){
        if(stype[v[i].second] == 2)continue;
        //cout << frst << endl;
        //cout << (get(last,v[i].second) <= location[last] - first) << endl;
        //cout << get(last,v[i].second) - (location[last] - first) << " " << get(0,v[i].second) - 2*location[x] + 2*first << endl;
        //cout << get(0,v[i].second) << endl;
        if(get(last,v[i].second) <= location[last] - first || get(last,v[i].second) - (location[last] - first) == get(0,v[i].second) - 2*location[x] + 2*first ){
            frst = v[i].second;
            location[frst] = location[last]-v[i].first;
            stype[frst] = 1;
        }
    }

    // for(int i = 0;i<n;i++){
    //     cout << location[i] << " " << stype[i] << endl;
    // }
}

Compilation message (stderr)

rail.cpp: In function 'void findLocation(int, int, int*, int*)':
rail.cpp:37:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |     for(int i = 1;i<v.size();i++){
      |                   ~^~~~~~~~~
rail.cpp:57:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   57 |     for(int i = 1;i<v.size();i++){
      |                   ~^~~~~~~~~

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