Submission #783804

#	Time	Username	Problem	Language	Result	Execution time	Memory
783804		FatihSolak	Rail (IOI14_rail)	C++17	30 / 100	713 ms	98484 KiB

rail

#include "rail.h"
#include <bits/stdc++.h>
using namespace std;
int dp[5000][5000];
int get(int a,int b){
    if(a == b)
        return 0;
    if(dp[a][b] || dp[b][a])
        return max(dp[a][b],dp[b][a]);
    return dp[a][b] = getDistance(a,b);
}
void findLocation(int n, int first, int location[], int stype[]){
    for(int i = 0;i<n;i++){
        for(int j = 0;j<n;j++){
            dp[i][j] = 0;
        }
    }
    location[0] = first;
    stype[0] = 1;
    if(n == 1)return;
    vector<int> ord0;
    for(int i = 0;i<n;i++){
        if(i != 0){
            ord0.push_back(i);
        }
    }
    sort(ord0.begin(),ord0.end(),[&](int a,int b){
        return get(0,a) < get(0,b);
    });
    int posD = ord0[0];
    location[posD] = location[0] + get(0,posD);
    stype[posD] = 2;
    for(int i = 1;i<ord0.size();i++){
        if(stype[ord0[i]])continue;
        if(get(0,ord0[i]) == get(posD,ord0[i]) + get(0,posD)){
            stype[ord0[i]] = 1;
            location[ord0[i]] = location[posD] - get(posD,ord0[i]);
            for(int j = 0;j<n;j++){
                if(stype[j])continue;
                if(get(0,j) == get(posD,j) + get(0,posD)){
                    if(get(posD,j) ==get(posD,ord0[i]) + get(ord0[i],j)){
                        stype[j] = 2;
                        location[j] = location[ord0[i]] + get(ord0[i],j);
                    }
                }
            }
        }
    }
    vector<int> ordD;
    for(int i = 0;i<n;i++){
        if(i != posD){
            ordD.push_back(i);
        }
    }
    sort(ordD.begin(),ordD.end(),[&](int a,int b){
        return get(posD,a) < get(posD,b);
    });
    for(int i = 1;i<ordD.size();i++){
        if(stype[ordD[i]])continue;
        if(get(posD,ordD[i]) == get(0,ordD[i]) + get(posD,0)){
            stype[ordD[i]] = 2;
            location[ordD[i]] = location[0] + get(0,ordD[i]);
            for(int j = 0;j<n;j++){
                if(stype[j])continue;
                if(get(posD,j) == get(0,j) + get(posD,0)){
                    if(get(0,j) == get(0,ordD[i]) + get(ordD[i],j)){
                        stype[j] = 1;
                        location[j] = location[ordD[i]] - get(ordD[i],j);
                    }
                }
            }
        }
    }
}

Compilation message (stderr)

rail.cpp: In function 'void findLocation(int, int, int*, int*)':
rail.cpp:33:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |     for(int i = 1;i<ord0.size();i++){
      |                   ~^~~~~~~~~~~~
rail.cpp:58:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   58 |     for(int i = 1;i<ordD.size();i++){
      |                   ~^~~~~~~~~~~~

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