oj.uz

Submission #528547

# Submission time Handle Problem Language Result Execution time Memory
528547 2022-02-20T13:47:21 Z aSSSd Skyscraper (JOI16_skyscraper) C++14
20 / 100
 252 ms 194812 KB 
//#pragma GCC optimize("O2,unroll-loops")
//#pragma GCC target("avx,avx2")
#include <bits/stdc++.h>
using namespace std;
#define in ({int x=0;int c=getchar(),n=0;for(;!isdigit(c);c=getchar()) n=(c=='-');for(;isdigit(c);c=getchar()) x=x*10+c-'0';n?-x:x;})
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int rnd(int l,int r)
{
    return l+rng()%(r-l+1);
}
#define fasty ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0);
#define forinc(x,a,b) for(int x=a;x<=b;x++)
#define fordec(x,a,b) for(int x=a;x>=b;x--)
#define forv(a,b) for(auto&a:b)
#define fi first
#define se second
#define pb push_back
#define ii pair<long long,long long>
#define getbit(x,i) ((x>>(i))&1)
#define batbit(x,i) (x|(1ll<<(i)))
#define tatbit(x,i) (x&~(1<<(i)))
#define gg exit(0);
#define all(a) a.begin() , a.end()
const int N = 14;
const int mod = 1e9 + 7;
int n, L;
int a[20];
int f[1<<15][15][210];
main()
{
    fasty;
    cin >> n >> L;
    forinc(i,1,n) cin >> a[i];
    f[0][0][0] = 1;
    if(n <= 10)
    {
        int cnt=0;
        sort(a+1 , a+n+1);
        do
        {
            int sum=0;
            forinc(i,1,n-1) sum += abs(a[i] - a[i+1]);
            if(sum <=  L) cnt++;
        }while(next_permutation(a+1 , a+n + 1));
        cout << cnt;
        return 0;
    }
    for(int tt =0 ; tt <= (1<<n) - 1 ; tt++) forinc(i , 0 , n) forinc(l , 0 , L) if(f[tt][i][l])
    {
        forinc(j , 1 , n) if(!getbit(tt , j-1))
        {
            int kc=0;
            if(tt != 0) kc = l + abs(a[j] - a[i]);
            int tt2 = batbit(tt , j-1);
            f[tt2][j][kc] = (f[tt2][j][kc] + f[tt][i][l])%mod;
        }

    }
    int res=0;
    forinc(i,1,n) forinc(l , 0 , L) res = (res + f[(1<<n) - 1][i][l])%mod;
    cout << res;


}

Compilation message

skyscraper.cpp:29:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   29 | main()
      | ^~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 43 ms 46136 KB Output is correct
2 Correct 149 ms 194792 KB Output is correct
3 Correct 224 ms 193984 KB Output is correct
4 Correct 148 ms 194660 KB Output is correct
5 Correct 131 ms 194812 KB Output is correct
6 Correct 231 ms 194576 KB Output is correct
7 Correct 132 ms 193408 KB Output is correct
8 Correct 216 ms 193900 KB Output is correct
9 Correct 252 ms 194120 KB Output is correct
10 Correct 152 ms 194508 KB Output is correct

Subtask #3
0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 43 ms 46136 KB Output is correct
12 Correct 149 ms 194792 KB Output is correct
13 Correct 224 ms 193984 KB Output is correct
14 Correct 148 ms 194660 KB Output is correct
15 Correct 131 ms 194812 KB Output is correct
16 Correct 231 ms 194576 KB Output is correct
17 Correct 132 ms 193408 KB Output is correct
18 Correct 216 ms 193900 KB Output is correct
19 Correct 252 ms 194120 KB Output is correct
20 Correct 152 ms 194508 KB Output is correct
21 Runtime error 7 ms 588 KB Execution killed with signal 11
22 Halted 0 ms 0 KB -