Submission #476963

#	Time	Username	Problem	Language	Result	Execution time	Memory
476963		leaked	Costinland (info1cup19_costinland)	C++14	0 / 100	7 ms	696 KiB

costinland

#include <bits/stdc++.h>
//#include "grader.h"
//#include "grader.cpp"

#define f first
#define s second
#define pb push_back
#define vec vector
#define sz(x) (int)x.size()
#define all(x) (x).begin(),(x).end()
#define rall(x) (x).rbegin(),(x).rend()
using namespace std;
#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__) << "] "
typedef pair<int,int> pii;
typedef long double ld;
auto rng=bind(uniform_int_distribution<long long>(1,1e18),mt19937(time(0)));
typedef long long ll;
template <class T> bool umax(T &a,const T &b){return (a<b?a=b,1:0);}
template <class T> bool umin(T &a,const T &b){return (a>b?a=b,1:0);}
const ll inf=1e18+100;
//const int N=49;
ll get(vec<string> s,bool dbg=0){
    int n=sz(s),m=sz(s[0]);
    vec<vec<vec<ll>>>dp(n,vec<vec<ll>>(m,vec<ll>(2,0)));
    if(s[0][0]=='r' || s[0][0]=='X')dp[0][0][0]=1;
    if(s[0][0]=='d' || s[0][0]=='X')dp[0][0][1]=1;
    for(int i=0;i<n;i++){
        for(int j=0;j<m;j++){
            if(i==0 && j==0) continue;
//            if(dbg && j==2){
//                debug()<<
//            }
            dp[i][j][0]=(i&&s[i-1][j]!='r'?dp[i-1][j][0]:0);
            dp[i][j][1]=(j&&s[i][j-1]!='d'?dp[i][j-1][1]:0);
            ll sm=dp[i][j][0]+dp[i][j][1];
            if(s[i][j]=='X'){
                dp[i][j][0]=sm;
                dp[i][j][1]=sm;
            }
            else if(s[i][j]=='d') dp[i][j][0]=sm;
            else if(s[i][j]=='r') dp[i][j][1]=sm;
            umin(dp[i][j][0],inf);umin(dp[i][j][1],inf);
        }

    }
    return dp[n-1][m-1][0]+dp[n-1][m-1][1];
}
signed main(){
    ///let me bruteforce
    ll k;
    cin>>k;
    int n=(k<=19?5:49);
    vec<string>s(n,string(n,'.'));
    for(int i=0;i<n;i++) s[0][i]=s[n-1][i]='r';
    for(int i=0;i<n;i++) s[i][0]=s[i][n-1]='d';
    for(int i=1;i<n-3;i++){
        s[i][i]=s[i+1][i+1]=s[i][i+1]=s[i+1][i]='X';
    }
    s[0][0]='X';s[n-1][n-1]='.';s[n-1][0]='r';
//    for(int i=0;i<n;i++) cout<<s[i]<<endl;
    ll nk=k;
    ll last=get(s);
    vec<array<ll,3>>go;
    for(int i=1;i<n-1;i++){
        s[0][i]='X';
        ll me=get(s,1);
        go.pb({me-last,0,i});
        go.pb({me-last,i,0});
        s[0][i]='r';
    }
    sort(rall(go));
    assert(last==2);
    k-=2;
    for(auto &z : go){
        if(k>=z[0]){
            s[z[1]][z[2]]='X';
            k-=z[0];
        }
    }
    assert(k==0);
    assert(get(s)==nk);
    for(int i=0;i<n;i++) cout<<s[i]<<endl;

//    debug()<<imie(s);
    return 0;
}

• Subtask 1: 0 / 20
• Subtask 2: 0 / 80