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답안 #319477

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
319477 2020-11-05T11:03:47 Z ronnith Zapina (COCI20_zapina) C++14
110 / 110
 600 ms 3312 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#warning Check Integer OverFlow
#define ll long long
#define rep(i,a,b) for(int i=a;i<b;i++)
#define per(i,a,b) for(int i=a;i>=b;i--)
#define trav(a,b) for(auto a:b)
#define sz(a) a.size()
#define maxs(a,b) if(b>a)a=b
#define mins(a,b) if(b<a)a=b
#ifdef LOCAL 
	#define dbg(x) cerr<<"["<<#x<<":"<<x<<"] "
	#define dbg2(a,b) dbg(a);dbg(b)
	#define dbg3(a,b,c) dbg2(a,b);dbg(c)
	#define dln cerr << ln
#else
	#define dbg(x) 0
	#define dbg2(a,b) 0
	#define dbg3(a,b,c) 0
	#define dln 0
#endif
#define gcd(a,b) __gcd(a,b)
#define lcm(a,b) (((a)/(__gcd(a,b))) * b)
#define print(arr) for(auto it = arr.begin();it < arr.end();it ++){cout << *it << " ";}cout << ln;
#define all(a) (a).begin(), (a).end()
#define vi vector<int>
#define v vector
#define p pair
#define pii p<int,int>
#define pb push_back
#define mk make_pair
#define f first
#define s second
#define ln "\n"
typedef long double ld;
using namespace std;
using namespace __gnu_pbds;
ll modF=1e9+7;

template<class T> using iset = tree<
T,
null_type,
less<T>,
rb_tree_tag,
tree_order_statistics_node_update>;

/*OUTPUT

*/

v<ll> fac(355,1);

void g(int a,int b,int* x,int* y){
	if(a == 0){
		*x = 0;
		*y = 1;
	}
	else{
		int x1,y1;
		g(b % a,a,&x1,&y1);
		*x = y1 - (b / a) * x1;
		*y = x1;
	}
}

ll modInverse(int a){
	int x,y;
	g(a,modF,&x,&y);
	while(x < 0)x += modF;
	return x % modF;
}

ll nCr(ll n,ll r){
	return (fac[n] * modInverse((fac[n - r] * fac[r]) % modF)) % modF;
}

ll nr[351][351];

void solve(){
	int n;
	cin >> n;
	ll dp1[n][n + 1];
	ll dp2[n][n + 1];
	rep(i,0,n + 1){
		rep(j,0,n + 1){
			if(i >= j)
				nr[i][j] = nCr(i,j);
		}
	}
	for(ll i = 0;i < n;i ++){
		for(ll j = 0;j <= n;j ++){
			if(i == 0){
				dp2[i][j] = 1;
				if(j == i + 1)
					dp1[i][j] = 1;
				else
					dp1[i][j] = 0;
			}
			else{
				dp1[i][j] = dp2[i][j] = 0;
				for(int k = 0;k <= j;k ++){
					dp2[i][j] = (dp2[i][j] + (nr[j][k] * dp2[i - 1][j - k]) % modF) % modF;
				}
				if(j >= i + 1){
					dp1[i][j] = (nr[j][i + 1] * dp2[i - 1][j - i - 1]) % modF;
				}
				for(int k = 0;k <= j;k ++){
					if(k == i + 1)continue;
					dp1[i][j] = (dp1[i][j] + (nr[j][k] * dp1[i - 1][j - k])) % modF;
				}
			}
		}
	}
	cout << dp1[n - 1][n] << ln;
}

int main(){
	ios::sync_with_stdio(0);cin.tie(0);
	int t = 1;
	rep(i,1,351){
		fac[i] = (fac[i - 1] * i) % modF;
	}
	// cin >> t;
	while(t --){
		solve();
	}
}

Compilation message

zapina.cpp:4:2: warning: #warning Check Integer OverFlow [-Wcpp]
    4 | #warning Check Integer OverFlow
      |  ^~~~~~~

Subtask #1
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 492 KB Output is correct

Subtask #2
33.0 / 33.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 492 KB Output is correct
6 Correct 1 ms 512 KB Output is correct
7 Correct 1 ms 492 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct

Subtask #3
55.0 / 55.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 492 KB Output is correct
6 Correct 1 ms 512 KB Output is correct
7 Correct 1 ms 492 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 289 ms 2252 KB Output is correct
18 Correct 3 ms 492 KB Output is correct
19 Correct 62 ms 1256 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 388 ms 2788 KB Output is correct
22 Correct 43 ms 1124 KB Output is correct
23 Correct 4 ms 620 KB Output is correct
24 Correct 81 ms 1380 KB Output is correct
25 Correct 55 ms 1124 KB Output is correct
26 Correct 111 ms 1508 KB Output is correct
27 Correct 559 ms 3072 KB Output is correct
28 Correct 555 ms 3044 KB Output is correct
29 Correct 566 ms 3172 KB Output is correct
30 Correct 568 ms 3172 KB Output is correct
31 Correct 571 ms 3300 KB Output is correct
32 Correct 574 ms 3168 KB Output is correct
33 Correct 583 ms 3220 KB Output is correct
34 Correct 590 ms 3172 KB Output is correct
35 Correct 591 ms 3300 KB Output is correct
36 Correct 596 ms 3312 KB Output is correct
37 Correct 600 ms 3300 KB Output is correct