Submission #3784986
Source Code Expand
#include <bits/stdc++.h> #define REP(i, n) for(int i = 0;i < n;i++) #define REPR(i, n) for(int i = n;i >= 0;i--) #define FOR(i, m, n) for(int i = m;i < n;i++) #define FORR(i, m, n) for(int i = m;i >= n;i--) #define SORT(v, n) sort(v, v+n); #define VSORT(v) sort(v.begin(), v.end()); #define VRSORT(v) sort(v.rbegin(), v.rend());//vectorの降順ソート #define ll long long #define pb(a) push_back(a) #define INF 1000000000 #define MOD 1000000007; using namespace std; typedef pair<int, int> P; typedef pair<ll, ll> LP; typedef pair<int, P> PP; typedef pair<ll, LP> LPP; int dy[]={0, 0, 1, -1, 0}; int dx[]={1, -1, 0, 0, 0}; const int MAX = 510000; long long fac[MAX], finv[MAX], inv[MAX]; // テーブルを作る前処理 void comb_init() { fac[0] = fac[1] = 1; finv[0] = finv[1] = 1; inv[1] = 1; for (int i = 2; i < MAX; i++){ fac[i] = fac[i - 1] * i % MOD; inv[i] = MOD - inv[MOD%i] * (MOD / i) % MOD; finv[i] = finv[i - 1] * inv[i] % MOD; } } // 二項係数計算 long long comb(int n, int k){ if (n < k) return 0; if (n < 0 || k < 0) return 0; return fac[n] * (finv[k] * finv[n - k] % MOD) % MOD; } int main(){ cin.tie(0); ios::sync_with_stdio(false); int n,k; cin >> n >> k; comb_init(); cout << comb(n+k-1,k << endl;) }
Submission Info
Submission Time | |
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Task | D - 多重ループ |
User | Bondo416 |
Language | C++14 (GCC 5.4.1) |
Score | 0 |
Code Size | 1363 Byte |
Status | CE |
Compile Error
./Main.cpp: In function ‘void comb_init()’: ./Main.cpp:12:23: error: expected ‘]’ before ‘;’ token #define MOD 1000000007; ^ ./Main.cpp:32:28: note: in expansion of macro ‘MOD’ inv[i] = MOD - inv[MOD%i] * (MOD / i) % MOD; ^ ./Main.cpp:32:31: error: expected primary-expression before ‘%’ token inv[i] = MOD - inv[MOD%i] * (MOD / i) % MOD; ^ ./Main.cpp:32:42: error: expected primary-expression before ‘/’ token inv[i] = MOD - inv[MOD%i] * (MOD / i) % MOD; ^ ./Main.cpp: In function ‘long long int comb(int, int)’: ./Main.cpp:12:23: error: expected ‘)’ before ‘;’ token #define MOD 1000000007; ^ ./Main.cpp:41:46: note: in expansion of macro ‘MOD’ return fac[n] * (finv[k] * finv[n - k] % MOD) % MOD; ^ ./Main.cpp:41:49: error: expected primary-expression before ‘)’ token return fac[n] ...