Submission #476946

#	Time	Username	Problem	Language	Result	Execution time	Memory
476946		leaked	Costinland (info1cup19_costinland)	C++14	0 / 100	385 ms	948 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()
#define m_p make_pair
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;
typedef long long ll;
auto rng=bind(uniform_int_distribution<ll>(1,1e18),mt19937(time(0)));

const ll inf=1e18;
template <class T> bool umin(T &a, T b){return (a>b?a=b,1:0);}
template <class T> bool umax(T &a, T b){return (a<b?a=b,1:0);}
//const int N=49;<
vec<vec<vec<ll>>>dp;
ll get(vec<string> s,bool dbg=0){
    int n=sz(s),m=sz(s[0]);
    vec<vec<vec<ll>>>ndp(n,vec<vec<ll>>(m,vec<ll>(2,0)));
    dp=ndp;
    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);
//            if(dbg)debug()<<imie(i)imie(j)imie(dp[i][j][0])imie(dp[i][j][1]);
        }

    }
//    if(dbg)
    return dp[n-1][m-1][0]+dp[n-1][m-1][1];
}
signed main(){
    ///let me bruteforce
    int n=33,m=33;
    ll k=19;
    cin>>k;
//    if(k<=19){
//    n=5;m=5;
//    vec<string>s(n,string(m,'.'));
//    for(int i=0;i<m;i++){
//        s[n-1][i]='r';
//    }
//    for(int i=0;i<n;i++) s[i][m-1]='d';
//    s[n-1][m-1]='.';
//    cout<<n<<' '<<m<<endl;
//    for(int mask=0;mask<(1<<((n-1)*(m-1)));mask++){
//        vec<string>me=s;
//        for(int i=0;i<(n-1)*(m-1);i++){
//            if((1<<i)&mask){
//                me[i/(m-1)][i%(m-1)]='X';
//            }
//        }
//        ll how=get(me);
////        cout<<how<<endl;
////        if(mask==1){
//////            cout<<get(me,1);
////        }
//        if(how==k && me[0][0]!='.'){
//            for(int i=0;i<n;i++) cout<<me[i]<<endl;
////            cout<<get(me,1);
//            return 0;
//        }
////        debug()<<imie(how);
////        for(int i=0;i<4;i++) debug()<<imie(me[i]);
////        debug()<<imie(me)imie(how);
//    }
//    }
    n=49;m=49;
    if(k<=19) n=5,m=5;
    cout<<n<<' '<<m<<endl;
    vec<string>s(n,string(m,'.'));
    for(int i=0;i<m;i++){
        s[n-1][i]='r';
    }
    for(int i=0;i<n;i++) s[i][m-1]='d';
    s[n-1][m-1]='.';
    auto check=[&](int x,int y){
        vec<string>tb(x,string(y,'X'));
        return get(tb);
    };
    int rem=m;
    int st=0;
    s[0][0]='X';
//    k-=2;
//    while(k!=0){
        get(s);
        ll mx=0;
        pii w={-1,-1};
        for(int i=0;i<n;i++){
            for(int j=0;j<m;j++){
//                ll how=dp[i][]
                if(i==n-1 && j==m-1) continue;
                if(s[i][j]=='.'){
                    s[i][j]='X';
                    ll how=get(s);
                    if(how<=k){
                        continue;
                    }

                    s[i][j]='.';
//                    debug()<<imie(how);
                }
            }
        }
//        s[w.f][w.s]='X';
//        if(1){
//            cout<<"DEBUG "<<k<<' '<<get(s)<<endl;
//            for(int i=0;i<n;i++){
//                cout<<s[i]<<endl;
//            }
//            if(mx==0) break;
////            return 0;
//        }
//        k-=mx;s[w.f][w.s]='X';
//    }
//    cout<<get(s)<<endl;
    assert(k==get(s));
//    cout<<"GOOD"<<endl;
    cout<<get(s)<<endl;
    for(int i=0;i<n;i++) cout<<s[i]<<endl;
    return 0;
}

Compilation message (stderr)

costinland.cpp: In function 'int main()':
costinland.cpp:127:10: warning: variable 'check' set but not used [-Wunused-but-set-variable]
  127 |     auto check=[&](int x,int y){
      |          ^~~~~
costinland.cpp:131:9: warning: unused variable 'rem' [-Wunused-variable]
  131 |     int rem=m;
      |         ^~~
costinland.cpp:132:9: warning: unused variable 'st' [-Wunused-variable]
  132 |     int st=0;
      |         ^~
costinland.cpp:137:12: warning: unused variable 'mx' [-Wunused-variable]
  137 |         ll mx=0;
      |            ^~
costinland.cpp:138:13: warning: variable 'w' set but not used [-Wunused-but-set-variable]
  138 |         pii w={-1,-1};
      |             ^

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