Submission #668747

#	Time	Username	Problem	Language	Result	Execution time	Memory
668747		Bogdan1110	Dreaming (IOI13_dreaming)	C++14	0 / 100	66 ms	57620 KiB

dreaming

#include <bits/stdc++.h>
#include "dreaming.h"
#define FAST {ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);}
#define FILES {freopen("input.txt", "r", stdin);freopen("output.txt", "w", stdout);}
#define ll long long
#define ull unsigned long long
#define pqueue priority_queue
#define pb push_back
#define fi first
#define se second
#define ld long double
#define pii pair<int,int>
#define pll pair<long long,long long>
#define all(a) (a).begin(), (a).end()
#define mp make_pair 
using namespace std;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;

#define ordered_set tree<pll, null_type,less<pll>, rb_tree_tag,tree_order_statistics_node_update>
// order_of_key -> # less than k
// find_by_order -> k-th element
// pq max element

const double eps = 0.00000001;
const int NMAX = 2000010;
const ll inf = LLONG_MAX/3;
const ll modi = 998244353;

int D, maks, mx;
vector<pii>al[NMAX];
int visited[NMAX], vv[NMAX];
int maksd,poc;

vector<int>vis,nes;
set<int>vektor;

void izr() {
    for (auto u : nes) {
        maks = min(maks, max(u,D-u));
    }
}

void dfs1(int node, int dist = 0) {
    if (visited[node]) {
        return;
    }
    vv[node] = 1;
    vis.pb(node);
    visited[node] =1;
    if ( dist > maksd ) {
        maksd = dist;
        poc = node;
    }
    for (auto u : al[node] ) {
        dfs1(u.fi, u.se + dist);
    }
}

void dfs2(int node, int dist = 0) {
    if (visited[node]||maks!= INT_MAX) {
        return;
    }
    vis.pb(node);
    visited[node] =1;
    nes.pb(dist);
    if ( dist == maksd ) {
        izr();
        return;
    }
    if ( dist > maksd ) {
        maksd = dist;
        poc = node;
    }
    for (auto u : al[node] ) {
        dfs2(u.fi, u.se + dist);
    }
    nes.erase(nes.end()-1);
}

void clrvis() {
    for (auto u : vis) {
        visited[u] = 0;
    }
    vis.clear();
}

int travelTime(int n,int m,int l,int A[],int B[],int T[]) {
    for (int i = 0 ; i < m; i++) {
        al[A[i]].pb({B[i],T[i]});
        al[B[i]].pb({A[i],T[i]});
    }
    vector<int>r;
    for (int i = 0 ; i < n ; i++ ) {
        if (!vv[i]) {
            maksd = -1;
            dfs1(i);
            clrvis();

            
            maksd = -1;
            dfs1(poc);
            clrvis();

            maks = INT_MAX;
            D = maksd;

            dfs2(poc);
            clrvis();
            nes.clear();
            r.pb(maks);
        }
    }

    //for (auto u : r) cout << u << ' ';
    

    sort(all(r));
    vector<int>t1,t2;
    for (int i = 0 ; i < r.size() ; i++) {
        if ( i%2 == 0 ) {
            t1.pb(r[i]);
        }
        else {
            t2.pb(r[i]);
        }
    }
    reverse(all(t2));
    for (auto u : t2) t1.pb(u);

    for (auto u : t1) cout << u << ' ';
    int res = 0;
    int tren = INT_MAX/4;
    for (int i = 0 ; i < t1.size(); i++ ) {
        res = max(res, t1[i] + l*i - tren);
        tren = min(tren, -t1[i] + l*i);
    }

    return res;
}

Compilation message (stderr)

dreaming.cpp: In function 'int travelTime(int, int, int, int*, int*, int*)':
dreaming.cpp:121:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  121 |     for (int i = 0 ; i < r.size() ; i++) {
      |                      ~~^~~~~~~~~~
dreaming.cpp:135:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  135 |     for (int i = 0 ; i < t1.size(); i++ ) {
      |                      ~~^~~~~~~~~~~

• Subtask 1: 0 / 14
• Subtask 2: 0 / 10
• Subtask 3: 0 / 23
• Subtask 4: 0 / 18
• Subtask 5: 0 / 12
• Subtask 6: 0 / 23