Submission #607622

#	Time	Username	Problem	Language	Result	Execution time	Memory
607622		MohamedFaresNebili	Rail (IOI14_rail)	C++14	8 / 100	107 ms	98536 KiB

rail

#include <bits/stdc++.h>
#include "rail.h"
/// #pragma GCC optimize ("Ofast")
/// #pragma GCC target ("avx2")
/// #pragma GCC optimize("unroll-loops")
 
            using namespace std;
 
            using ll = long long;
            using ld = long double;
 
            #define ff first
            #define ss second
            #define pb push_back
            #define all(x) (x).begin(), (x).end()
            #define lb lower_bound
 
            const int MOD = 998244353;
 
            int DP[5005][5005];
            int query(int i, int j) {
                if(i == j) return 0;
                if(DP[i][j] != -1)
                    return DP[i][j];
                return DP[i][j] = DP[j][i] = getDistance(i, j);
            }
 
            void findLocation(int n, int first, int location[], int stype[]) {
              	memset(DP, -1, sizeof DP);
                array<int, 2> A[n]; A[0] = {0, 0};
                location[0] = first, stype[0] = 1;
                for(int l = 1; l < n; l++)
                    A[l] = {query(0, l), l};
                sort(A, A + n);
                int L = 0, R = A[1][1];
                stype[R] = 2; location[R] = first + A[1][0];
 
                for(int l = 2; l < n; l++) {
                    int i = A[l][1];
                    int U = query(L, i);
                    int V = query(R, i);
                    int K = query(0, i);
                  	if(query(0, R) + K == V) {
                        stype[i] = 2;
                        location[i] = location[L] + U;
                        if(location[i] > location[R])
                            R = i;
                      	continue;
                    }
                    if(K + V == query(0, R)) {
                        stype[i] = 1;
                        location[i] = location[R] - V;
                        if(location[i] < location[L])
                            L = i;
                      	continue;
                    }
                }
            }

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