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답안 #631108

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
631108 2022-08-17T17:08:30 Z urosk Skyscraper (JOI16_skyscraper) C++14
20 / 100
 2000 ms 199848 KB 
#define here cerr<<"===========================================\n"
#define dbg(x) cerr<<#x<<": "<<x<<endl;
#include <bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>
#define ld double
#define ll int
#define llinf 100000000000000000LL // 10^17
#define pb push_back
#define popb pop_back
#define fi first
#define sc second
#define endl '\n'
#define pll pair<ll,ll>
#define pld pair<ld,ld>
#define sz(a) (ll)(a.size())
#define all(a) a.begin(),a.end()
#define ceri(a,l,r) {cerr<<#a<<": ";for(ll i_ = l;i_<=r;i_++) cerr<<a[i_]<< " ";cerr<<endl;}
#define daj_mi_malo_vremena ios_base::sync_with_stdio(false);cerr.tie(0);cout.tie(0);cin.tie(0);

using namespace std;
using namespace __gnu_pbds;
#define mod 1000000007
ll add(ll x,ll y){
    x+=y;
    if(x<0){
        x%=mod;
        x+=mod;
    }else{
        if(x>=mod) x%=mod;
    }
    return x;
}
ll mul(ll a,ll b){
	ll ans = (a*b)%mod;
	if(ans<0) ans+=mod;
	return ans;
}

typedef tree<int,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update> ordered_set;
typedef tree<int,null_type,less_equal<ll>,rb_tree_tag,tree_order_statistics_node_update> ordered_multiset;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
ll rnd(ll l,ll r){
    return uniform_int_distribution<ll>(l,r)(rng);
}
#define maxn 105
ll n,L;
ll a[maxn];
map<ll,ll> dp[maxn][maxn][2][2];

int main(){
	daj_mi_malo_vremena
    cin >> n >> L;
    for(ll i = 1;i<=n;i++) cin >> a[i];
    if(n==1){cout<<1<<endl;return 0;}
    sort(a+1,a+n+1);
    dp[1][1][1][0][-a[1]] = 1;
    dp[1][1][0][1][-a[1]] = 1;
    dp[1][1][0][0][-2*a[1]] = 1;
	for(ll i = 2;i<=n;i++){
        for(ll j = 1;j<=n;j++){
            for(ll l = 0;l<=1;l++){
                for(ll r = 0;r<=1;r++){
                    for(pll p : dp[i-1][j][l][r]){
                        ll k = p.fi;
                        ll cnt = p.sc;
                        if(k>L+k + (2*j+1-l-r)*a[i]>L) break;
                        dp[i][j][l][r][k] = add(dp[i][j][l][r][k],mul(cnt,2*j-l-r));
                        if(!l) dp[i][j][1][r][k+a[i]] = add(dp[i][j][1][r][k+a[i]],cnt);
                        if(!r) dp[i][j][l][1][k+a[i]] = add(dp[i][j][l][1][k+a[i]],cnt);
                        dp[i][j+1][l][r][k-2*a[i]] = add(dp[i][j+1][l][r][k-2*a[i]],mul(cnt,j+1-l-r));
                        if(!l) dp[i][j+1][1][r][k-a[i]] = add(dp[i][j+1][1][r][k-a[i]],cnt);
                        if(!r) dp[i][j+1][l][1][k-a[i]] = add(dp[i][j+1][l][1][k-a[i]],cnt);
                        dp[i][j-1][l][r][k+2*a[i]] = add(dp[i][j-1][l][r][k+2*a[i]],mul(cnt,j-1));
                    }
                }
            }
        }
	}
	ll ans = 0;
	for(pll p : dp[n][1][1][1]){
        ll k = p.fi;
        ll cnt = p.sc;
        if(k<=L) ans = add(ans,cnt);
	}
	cout<<ans<<endl;
	return 0;
}

Compilation message

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:67:29: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses]
   67 |                         if(k>L+k + (2*j+1-l-r)*a[i]>L) break;
      |                            ~^~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2388 KB Output is correct
2 Correct 2 ms 2368 KB Output is correct
3 Correct 1 ms 2388 KB Output is correct
4 Correct 2 ms 2388 KB Output is correct
5 Correct 8 ms 3796 KB Output is correct
6 Correct 9 ms 3796 KB Output is correct
7 Correct 6 ms 3156 KB Output is correct
8 Correct 2 ms 2516 KB Output is correct
9 Correct 8 ms 3848 KB Output is correct
10 Correct 3 ms 2644 KB Output is correct

Subtask #2
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 2772 KB Output is correct
2 Correct 46 ms 7672 KB Output is correct
3 Correct 9 ms 3412 KB Output is correct
4 Correct 47 ms 7804 KB Output is correct
5 Correct 53 ms 8984 KB Output is correct
6 Correct 26 ms 5572 KB Output is correct
7 Correct 16 ms 4276 KB Output is correct
8 Correct 13 ms 3412 KB Output is correct
9 Correct 15 ms 3540 KB Output is correct
10 Correct 35 ms 6736 KB Output is correct

Subtask #3
0 / 80.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2388 KB Output is correct
2 Correct 2 ms 2368 KB Output is correct
3 Correct 1 ms 2388 KB Output is correct
4 Correct 2 ms 2388 KB Output is correct
5 Correct 8 ms 3796 KB Output is correct
6 Correct 9 ms 3796 KB Output is correct
7 Correct 6 ms 3156 KB Output is correct
8 Correct 2 ms 2516 KB Output is correct
9 Correct 8 ms 3848 KB Output is correct
10 Correct 3 ms 2644 KB Output is correct
11 Correct 4 ms 2772 KB Output is correct
12 Correct 46 ms 7672 KB Output is correct
13 Correct 9 ms 3412 KB Output is correct
14 Correct 47 ms 7804 KB Output is correct
15 Correct 53 ms 8984 KB Output is correct
16 Correct 26 ms 5572 KB Output is correct
17 Correct 16 ms 4276 KB Output is correct
18 Correct 13 ms 3412 KB Output is correct
19 Correct 15 ms 3540 KB Output is correct
20 Correct 35 ms 6736 KB Output is correct
21 Correct 661 ms 57920 KB Output is correct
22 Execution timed out 2095 ms 199848 KB Time limit exceeded
23 Halted 0 ms 0 KB -