Submission #251470

#	Time	Username	Problem	Language	Result	Execution time	Memory
251470		leaked	Retro (COCI17_retro)	C++14	46 / 100	150 ms	102612 KiB

retro

#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(cerr << *x, 0);
sim > char dud(...);
struct debug {
#ifndef LOCAL
~debug() { cerr << endl; }
eni(!=) cerr << 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
////////////////////////////////???????????????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); }
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 pii lol[3]={{-1,1},{-1,0},{-1,-1}};
const char rev_to[4]={'E','W','N','S'};
const int N=3e2+100;
const int M=1e9+7;
//typedef tree<ll,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update> st;
//int n,m,k;
//int a[N],b[N];
//int f[N],cnt[26],dp[N];
int dp[N][N][N];
char a[N][N];
signed main()
{
    int n,m;
    cin>>n>>m;
    for(int i=0;i<=n+1;i++){
        for(int j=0;j<=m+1;j++){
            a[i][j]='*';
        }
    }
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            cin>>a[i][j];
        }
    }
    int st=-1;
    for(int i=1;i<=m;i++){
        if(a[n][i]=='M') st=i;
    }
    dp[n][st][0]=1;
    for(int i=n;i>1;i--){
        for(int j=1;j<=m;j++){
            for(int bal=0;bal<=(n-i);bal++){
                if(!dp[i][j][bal]) continue;
                for(auto &z : lol){
                    int ni=z.f+i,nj=z.s+j;
                    if(a[ni][nj]!='*'){
                        if(a[ni][nj]=='.'){
                            dp[ni][nj][bal]=max(dp[ni][nj][bal],dp[i][j][bal]);
                        }
                        else if(a[ni][nj]==')'){
                            if(bal>0){
                                dp[ni][nj][bal-1]=max(dp[ni][nj][bal-1],dp[i][j][bal]+1);
                            }
                        }else{
                             dp[ni][nj][bal+1]=max(dp[ni][nj][bal+1],dp[i][j][bal]+1);
                        }
                    }
                }
            }
        }
    }
    pii mx={n,st};
    for(int i=n-1;i>=1;i--){
        for(int j=0;j<=m;j++){
            if(!dp[i][j][0]) continue;
            bool ok=0;
            for(auto &z : lol){
                int ni=z.f+i,nj=z.s+j;
                if(a[ni][nj]=='*'){
                    ok=1;
                }
            }
            if(ok){
                if(dp[i][j][0]>dp[mx.f][mx.s][0]){
                    mx={i,j};
                }
            }
        }
    }
    cout<<dp[mx.f][mx.s][0]-1<<endl;
    int bal=0;
    string s;
    while(mx.f!=n){
        int who=(a[mx.f][mx.s]==')' ? -1 : (a[mx.f][mx.s]=='('? 1 : 0));
        for(auto &z : lol){
            int ni=-z.f+mx.f,nj=-z.s+mx.s;
            if(dp[ni][nj][bal-who]==dp[mx.f][mx.s][bal]-abs(who)){
                if(who)s+=a[mx.f][mx.s];
                mx={ni,nj};
                bal-=who;
                break;
            }
        }
    }
//    s+=a[mx.f][mx.s];
    reverse(all(s));
     cout<<s;
    return 0;
}
/*
    4 4
    1 2 a
    3 2 a
    1 4 a
    3 4 b




*/

• Subtask 1: 46 / 100