Submission #1053360

#	Time	Username	Problem	Language	Result	Execution time	Memory
1053360		mindiyak	Text editor (CEOI24_editor)	C++14	Compilation error	0 ms	0 KiB

Main

#pragma GCC optimize("O1,O2,O3,Ofast,unroll-loops")
#include <bits/stdc++.h>
#include <string>
#include <iostream>
#include <cmath>
#include <numeric>
#include <stack>
#include <queue>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<int, int> pi;
typedef pair<ll, ll> pl;
typedef pair<ld, ld> pd;
typedef vector<int> vi;
typedef vector<bool> vb;
typedef vector<vector<int>> vvi;
typedef vector<vector<pi>> vvpi;
typedef vector<ld> vd;
typedef vector<long long> vl;
typedef vector<pi> vpi;
typedef vector<pl> vpl;
#define FOR(i, a, b) for (ll i = a; i < (b); i++)
#define F0R(i, a) for (int i = 0; i < (a); i++)
#define FORd(i, a, b) for (int i = (b)-1; i >= a; i--)
#define F0Rd(i, a) for (int i = (a)-1; i >= 0; i--)
#define trav(a, x) for (auto &a : x)
#define uid(a, b) uniform_int_distribution<int>(a, b)(rng)
#define len(x) (int)(x).size()
#define mp make_pair
#define pb push_back
#define F first
#define nl endl
#define S second
#define lb lower_bound
#define ub upper_bound
#define aint(x) x.begin(), x.end()
#define raint(x) x.rbegin(), x.rend()
#define ins insert
const int M = 1e9+7;
void init(string name)
{
    freopen((name + ".in").c_str(), "r", stdin);
    freopen((name + ".out").c_str(), "w", stdout);
}
void fastIO()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
}

ll ans = -1;
pi snode,enode;
int n;
vi arr;

int dis(pi a,pi b){
    int val = abs(a.F-b.F) + abs(a.S-b.S);
    val = min(val,a.F+(arr[0]-b.F)+ abs(a.S-b.S) -1);
    val = min(val,b.F+(arr[0]-a.F)+ abs(a.S-b.S) -1);
    return val;
}

void dfs(pi pos,int cnt){
    if(ans != -1)return;

    // cout << pos.F << "," << pos.S << " " << cnt << endl;

    if(pos == enode){
        ans = cnt;
        return;
    }

    priority_queue<pair<int,pi>> pq;

    //left 
    pi a = pos;
    a.F -= 1;
    if(a.F < 0){
        if(a.S == 0){
            a = {0,0};
        }else{
            a = {arr[a.S-1],a.S-1};
        }
    }
    pq.push({-dis(a,enode),a});
    // cout << "L " << a.F << "," << a.S << endl;

    //right 
    a = pos;
    a.F += 1;
    if(a.F > arr[a.S]){
        if(a.S == n-1){
            a = {n-1,0};
        }else{
            a = {0,a.S+1};
        }
    }
    pq.push({-dis(a,enode),a});
    // cout << "R " << a.F << "," << a.S << endl;

    //down 
    a = pos;
    a.S = min(n-1,a.S+1);
    if(a.F > arr[a.S]){
        a = {arr[a.S],a.S};
    }
    pq.push({-dis(a,enode),a});
    // cout << "D " << a.F << "," << a.S << endl;

    //up 
    a = pos;
    a.S = max(0,a.S-1);
    if(a.F > arr[a.S]){
        a = {arr[a.S],a.S};
    }
    pq.push({-dis(a,enode),a});
    // cout << "U " << a.F << "," << a.S << endl;

    while(!pq.empty()){
        auto b = pq.top();pq.pop();
        // cout << b.F << " " << b.S.F << "," << b.S.S << endl;
        if(dis(a,pos) == 0)continue;
        dfs(b.S,cnt+1);
    }
    

    
}

void solve()
{
    cin >> n;
    if(n==1)return 0;
    int a,b,c,d;
    cin >> a >> b;
    cin >> c >> d;
    a--;b--;c--;d--;
    snode = {b,a};enode = {d,c};

    if(n == 2){
        cout << dis(snode,enode) << endl;
        return;
    }

    arr = vi(n);
    
    FOR(i,0,n)cin >> arr[i];

    dfs(snode,0);

    cout << ans << endl;

}   


int main()
{
    fastIO();
    // init("test");
    int t = 1;
    // cin >> t;
    while (t--)
        solve();
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'void solve()':
Main.cpp:135:20: error: return-statement with a value, in function returning 'void' [-fpermissive]
  135 |     if(n==1)return 0;
      |                    ^
Main.cpp: In function 'void init(std::string)':
Main.cpp:44:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   44 |     freopen((name + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:45:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   45 |     freopen((name + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~