Submission #251433

#	Time	Username	Problem	Language	Result	Execution time	Memory
251433		leaked	Portal (COCI17_portal)	C++14	36 / 120	71 ms	11704 KiB

portal

#include<bits/stdc++.h>
using namespace std;
//#include<ext/pb_ds/assoc_container.hpp>
//#include<ext/pb_ds/tree_policy.hpp>
////
//    #pragma GCC optimize("unroll-loops")
//    #pragma GCC optimize("Ofast")
//    #pragma GCC optimize("-O3")
//    #pragma GCC optimize("no-stack-protector")
//    #pragma GCC optimize("fast-math")
//////#define LOCAL
#define sim template < class c
#define ris return * this
#define dor > debug & operator <<
#define eni(x) sim > typename \
  enable_if<sizeof dud<c>(0) x 1, debug&>::type operator<<(c i) {
sim > struct rge { c b, e; };
sim > rge<c> range(c i, c j) { return rge<c>{i, j}; }
sim > auto dud(c* x) -> decltype(cout << *x, 0);
sim > char dud(...);
struct debug {
#ifndef LOCAL
~debug() { cout << endl; }
eni(!=) cout << boolalpha << i; ris; }
eni(==) ris << range(begin(i), end(i)); }
sim, class b dor(pair < b, c > d) {
  ris << "(" << d.first << ", " << d.second << ")";
}
sim dor(rge<c> d) {
  *this << "[";
  for (auto it = d.b; it != d.e; ++it)
	*this << ", " + 2 * (it == d.b) << *it;
  ris << "]";
}
#else
sim dor(const c&) { ris; }
#endif
};
#define imie(...) " [" << #__VA_ARGS__ ": " << (__VA_ARGS__) << "] "
#define fi first
#define f first
#define se second
#define s second
#define vi_a vector<int>a;
#define p_b push_back
////////////////////////////////???????????????CHECK THIS OUT???????????????//////////////////////////////
#define ll long long
//#define ull unsigned long long
typedef unsigned long long ull;
////////////////////////////////???????????????CHECK THIS OUT???????????????//////////////////////////////
#define ld long double
#define pll pair<ll,ll>
#define pii pair<int,int>
#define m_p make_pair
#define fast_io cin.tie(0);cout.tie(0);ios_base::sync_with_stdio(0);
#define all(x) x.begin(),x.end()
#define getfiles    ifstream cin("input.txt");ofstream cout("output.txt");
#define pw(x) (1ll << x)
#define sz(x) (ll)x.size()
#define endl "\n"
#define rall(x) x.rbegin(),x.rend()
#define len(a) (ll)a.size()
#define rep(x,l,r) for(ll x=l;x<r;x++)

//using namespace __gnu_pbds;
ld eps = (ld)1 / 1e6;
const ld pi=3.14159265359;
ll inf = 1e18,mod1=1e9+7;
ll sqr(ll a) { return a * a; }
ll qb(ll a) { return a * a * a; }
ll gcd(ll a, ll b) { return !a ? b : gcd(b % a, a); }
void binary(ll val,int to) {for(int i=0;i<to;i++) cerr<<(pw(i) & val ? 1 : 0); cerr<<endl;}
ll binpow(ll a, ll b, ll mod) { return b ? (b % 2 ? (a * (sqr(binpow(a, b / 2, mod)) % mod)) % mod : sqr(binpow(a, b / 2, mod)) % mod) : 1; }
ll binmult(ll a, ll b, ll mod) { return b ? (b % 2 ? (2 * binmult(a, b / 2, mod) + a) % mod : (2 * binmult(a, b / 2, mod)) % mod) : 0; }
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
const ll R=1e4;
const ll tx[4]={0,0,-1,1};
const ll ty[4]={-1,1,0,0};
const char rev_to[4]={'E','W','N','S'};
const int N=5e3+1;
const int M=1e9+7;
//typedef tree<pii,null_type,less<pii>,rb_tree_tag,tree_order_statistics_node_update> st;
void bad(){
    cout<<-1;
    exit(0);
}
typedef struct node* nt;
auto rnd=bind(uniform_int_distribution<ll>(1,1e18),mt19937(time(0)));
pii nxt[N][N][4];
signed main()
{
    fast_io;
//    freopen("in.txt","r",stdin);
//    freopen("out.txt","w",stdout);
    int n,m;
    cin>>n>>m;
    vector<vector<char>>a(n,vector<char>(m));
    pii st,nd;
    for(int i=0;i<n;i++)for(int j=0;j<m;j++) {
            cin>>a[i][j];
            if(a[i][j]=='C')st={i,j};
            if(a[i][j]=='F')nd={i,j};
    }
    //0->L,1->R,2->U,3->D;
    {
        for(int i=0;i<n;i++){
            int prev=-1;
            for(int j=0;j<m;j++){
                if(a[i][j]=='#'){
                    prev=j;
                }
                nxt[i][j][0]={i,prev+1};
            }
        }
        for(int i=0;i<n;i++){
            int prev=m;
            for(int j=m-1;j>=0;j--){
                if(a[i][j]=='#'){
                    prev=j;
                }
                nxt[i][j][1]={i,prev-1};
            }
        }
        for(int j=0;j<m;j++){
            int prev=-1;
            for(int i=0;i<n;i++){
                if(a[i][j]=='#'){
                    prev=i;
                }
                nxt[i][j][2]={prev+1,j};
            }
        }
        for(int j=0;j<m;j++){
            int prev=n;
            for(int i=n-1;i>=0;i--){
                if(a[i][j]=='#'){
                    prev=i;
                }
                nxt[i][j][3]={prev-1,j};
            }
        }
    }
    vector<vector<int>>ans(n,vector<int>(m,2e9));
    priority_queue<pair<int,pii>,vector<pair<int,pii>>,greater<pair<int,pii>>>pq;
    pq.push({0,st});
    auto here=[&](int i,int j){
        return i>=0 && j>=0 && i<n && j<m && a[i][j]!='#';
    };
    auto check_dst=[&](pii f,pii s){
        return abs(f.f-s.f)+abs(f.s-s.s);
    };
//    set<pair<int,pii>>st;
    auto upd=[&](pii f,int how){
        if(here(f.f,f.s) && ans[f.f][f.s]>how){
            ans[f.f][f.s]=how;
            pq.push({how,f});
        }
    };
    ans[st.f][st.s]=0;
    while(!pq.empty()){
        auto c=pq.top().s;auto dst=pq.top().f;
        pq.pop();
//        debug()<<imie(ans);
        if(ans[c.f][c.s]<dst) continue;
        for(int i=0;i<4;i++){
////            for(int j=0;j<4;j++){
//                if(i==j) continue;
                pii f=nxt[c.f][c.s][i];
                pii s={c.f,c.s};
                while(a[s.f][s.s]!='#'){
                    s.f=s.f+tx[i],s.s=s.s+ty[i];
                }s.f=s.f-tx[i],s.s=s.s-ty[i];
//                debug()<<imie(f)<<imie(s);
//                assert(s==f);
                upd(s,1+dst);
//                upd(s,check_dst(c,f)+1+dst);
//            }
        }
        for(int i=0;i<4;i++){
            int nx=c.f+tx[i],ny=c.s+ty[i];
            upd({nx,ny},dst+1);
        }
    }
//    for(int i=0;i<n;i++)for(int j=0;j<m;j++) {
//           debug()<<imie(i)<<imie(j)<<imie(ans[i][j])<<imie(nxt[i][j][0])<<imie(nxt[i][j][1])<<imie(nxt[i][j][2])<<imie(nxt[i][j][3]);
//    }
    if(ans[nd.f][nd.s]==2e9){
       cout<<"Nemoguce";
       exit(0);
    }
    cout<<ans[nd.f][nd.s];
    return 0;
}
/*
4 5
#####
#..F#
#C..#
#####


*/

Compilation message (stderr)

portal.cpp: In function 'int main()':
portal.cpp:41:11: warning: variable 'first' set but not used [-Wunused-but-set-variable]
 #define f first
           ^
portal.cpp:168:21: note: in expansion of macro 'f'
                 pii f=nxt[c.f][c.s][i];
                     ^
portal.cpp:149:10: warning: variable 'check_dst' set but not used [-Wunused-but-set-variable]
     auto check_dst=[&](pii f,pii s){
          ^~~~~~~~~

• Subtask 1: 12 / 12
• Subtask 2: 12 / 12
• Subtask 3: 12 / 12
• Subtask 4: 0 / 12
• Subtask 5: 0 / 12
• Subtask 6: 0 / 12
• Subtask 7: 0 / 12
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• Subtask 10: 0 / 12