結果

問題 No.612 Move on grid
コンテスト
ユーザー firiexp
提出日時 2019-12-27 09:46:41
言語 C++14
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 74 ms / 2,500 ms
コード長 2,877 bytes
コンパイル時間 967 ms
コンパイル使用メモリ 101,160 KB
実行使用メモリ 42,496 KB
最終ジャッジ日時 2024-11-15 19:14:17
合計ジャッジ時間 2,615 ms
ジャッジサーバーID
（参考情報） 		judge1 / judge4
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ファイルパターン 結果
sample AC * 4
other AC * 17
権限があれば一括ダウンロードができます

ソースコード

diff # 

#include <limits>
#include <iostream>
#include <algorithm>
#include <iomanip>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <numeric>
#include <bitset>
#include <cmath>

static const int MOD = 1000000007;
using ll = long long;
using u32 = unsigned;
using u64 = unsigned long long;
using namespace std;

template<class T> constexpr T INF = ::numeric_limits<T>::max()/32*15+208;

template <class T, class U>
vector<T> make_v(U size, const T& init){ return vector<T>(static_cast<size_t>(size), init); }

template<class... Ts, class U>
auto make_v(U size, Ts... rest) { return vector<decltype(make_v(rest...))>(static_cast<size_t>(size), make_v(rest...)); }

template<class T> void chmin(T &a, const T &b){ a = (a < b ? a : b); }
template<class T> void chmax(T &a, const T &b){ a = (a > b ? a : b); }

template<u32 M = 1000000007>
struct modint{
    u32 val;
    modint(): val(0){}
    template<typename T>
    modint(T t){t %= (T)M; if(t < 0) t += (T)M; val = t;}

    modint pow(ll k) const {
        modint res(1), x(val);
        while(k){
            if(k&1) res *= x;
            x *= x;
            k >>= 1;
        }
        return res;
    }
    template<typename T>
    modint& operator=(T t){t %= (T)M; if(t < 0) t += (T)M; val = t; return *this;}
    modint inv() const {return pow(M-2);}
    modint& operator+=(modint a){val += a.val; if(val >= M) val -= M; return *this;}
    modint& operator-=(modint a){if(val < a.val) val += M-a.val; else val -= a.val; return *this;}
    modint& operator*=(modint a){val = (u64)val*a.val%M; return *this;}
    modint& operator/=(modint a){return (*this) *= a.inv();}
    modint operator+(modint a) const {return modint(val) +=a;}
    modint operator-(modint a) const {return modint(val) -=a;}
    modint operator*(modint a) const {return modint(val) *=a;}
    modint operator/(modint a) const {return modint(val) /=a;}
    modint operator-(){return modint(M-val);}
    bool operator==(const modint a) const {return val == a.val;}
    bool operator!=(const modint a) const {return val != a.val;}
    bool operator<(const modint a) const {return val < a.val;}
};
using mint = modint<MOD>;

int main() {
    int t, a, b, c, d, e;
    cin >> t >> a >> b >> c >> d >> e;
    a = abs(a);
    b = abs(b);
    c = abs(c);
    int M = 10001, X = max({a, b, c});
    auto dp = make_v(t+1, 2*M+1, mint(0));
    int l = M, r = M;
    dp[0][M] = 1;
    for (int i = 0; i < t; ++i) {
        for (int j = l; j <= r; ++j) {
            dp[i+1][j+a] += dp[i][j];
            dp[i+1][j-a] += dp[i][j];
            dp[i+1][j+b] += dp[i][j];
            dp[i+1][j-b] += dp[i][j];
            dp[i+1][j+c] += dp[i][j];
            dp[i+1][j-c] += dp[i][j];
        }
        l -= X; r += X;
    }
    mint ans;
    for (int i = d; i <= e; ++i) {
        ans += dp[t][i+M];
    }
    cout << ans.val << "\n";
    return 0;
}
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