結果
問題 | No.389 ロジックパズルの組み合わせ |
ユーザー |
|
提出日時 | 2016-07-08 22:35:10 |
言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 162 ms / 2,000 ms |
コード長 | 2,914 bytes |
コンパイル時間 | 1,648 ms |
コンパイル使用メモリ | 169,348 KB |
実行使用メモリ | 5,580 KB |
最終ジャッジ日時 | 2024-10-13 04:35:50 |
合計ジャッジ時間 | 5,999 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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ファイルパターン | 結果 |
---|---|
other | AC * 99 |
ソースコード
#include "bits/stdc++.h"using namespace std;#define FOR(i,j,k) for(int (i)=(j);(i)<(int)(k);++(i))#define rep(i,j) FOR(i,0,j)#define each(x,y) for(auto &(x):(y))#define mp make_pair#define all(x) (x).begin(),(x).end()#define debug(x) cout<<#x<<": "<<(x)<<endl#define smax(x,y) (x)=max((x),(y))#define smin(x,y) (x)=min((x),(y))#define MEM(x,y) memset((x),(y),sizeof (x))#define sz(x) (int)(x).size()typedef long long ll;typedef pair<int, int> pii;typedef vector<int> vi;typedef vector<ll> vll;template<int MOD>class ModInt{public:ModInt():value(0){}ModInt(int val):value(val<0?MOD+val%MOD:val%MOD){ }ModInt& operator+=(ModInt that){value = value+that.value;if(value>=MOD)value-=MOD;return *this;}ModInt& operator-=(ModInt that){value -= that.value;if(value<0)value+=MOD;return *this;}ModInt& operator*=(ModInt that){value = (int)((long long)value * that.value % MOD);return *this;}ModInt &operator/=(ModInt that){return *this *= that.inverse();}ModInt operator+(ModInt that) const{return ModInt(*this)+=that;}ModInt operator-(ModInt that) const{return ModInt(*this)-=that;}ModInt operator*(ModInt that) const{return ModInt(*this)*=that;}ModInt operator/(ModInt that) const {return ModInt(*this) /= that;}ModInt operator^(long long k) const{ModInt n = *this, res = 1;while(k){if(k & 1)res *= n;n *= n;k >>= 1;}return res;}ModInt inverse() const {long long a = value, b = MOD, u = 1, v = 0;while(b) {long long t = a / b;a -= t * b;swap(a, b);u -= t * v;swap(u, v);}return ModInt(u);}int toi() const{ return value; }private:int value;};typedef ModInt<1000000007> mint;ostream& operator<<(ostream& os, const mint& x){os << x.toi();return os;}/*n個のものからr個選ぶ場合の数O(n+r)*/mint nCr(int n, int r){mint res = 1;for(int i = 2; i <= n; ++i)res *= i;for(int i = 2; i <= n - r; ++i)res /= i;for(int i = 2; i <= r; ++i)res /= i;return res;}/*n個のものから「重複を許して」r個選ぶ場合の数O(n+r)*/mint nHr(int n, int r){return nCr(n + r - 1, r);}int main(){int N;cin >> N;vi a;int x;while(~scanf("%d", &x)){a.push_back(x);}if(sz(a) == 1 && (a[0] == 0 || a[0] == N)){puts("1");return 0;}int sum = -1;each(y, a){sum += y + 1;if(sum > N){puts("NA");return 0;}}mint ans = nHr(sz(a) + 1, N - sum);cout << ans << endl;}