結果

問題 No.797 Noelちゃんとピラミッド
ユーザー ganariyaganariya
提出日時 2019-03-16 16:41:08
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 78 ms / 2,000 ms
コード長 7,358 bytes
コンパイル時間 1,485 ms
コンパイル使用メモリ 143,608 KB
実行使用メモリ 7,296 KB
最終ジャッジ日時 2024-07-01 22:33:56
合計ジャッジ時間 7,198 ms
ジャッジサーバーID
(参考情報)
judge3 / judge4
このコードへのチャレンジ
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 38 ms
6,816 KB
testcase_01 AC 36 ms
6,944 KB
testcase_02 AC 38 ms
6,944 KB
testcase_03 AC 77 ms
7,168 KB
testcase_04 AC 77 ms
7,296 KB
testcase_05 AC 78 ms
7,168 KB
testcase_06 AC 77 ms
7,168 KB
testcase_07 AC 77 ms
7,132 KB
testcase_08 AC 77 ms
7,132 KB
testcase_09 AC 77 ms
7,168 KB
testcase_10 AC 77 ms
7,256 KB
testcase_11 AC 77 ms
7,128 KB
testcase_12 AC 77 ms
7,124 KB
testcase_13 AC 76 ms
7,252 KB
testcase_14 AC 77 ms
7,128 KB
testcase_15 AC 77 ms
7,128 KB
testcase_16 AC 77 ms
7,168 KB
testcase_17 AC 78 ms
7,132 KB
testcase_18 AC 77 ms
7,128 KB
testcase_19 AC 77 ms
7,128 KB
testcase_20 AC 77 ms
7,168 KB
testcase_21 AC 77 ms
7,168 KB
testcase_22 AC 78 ms
7,296 KB
testcase_23 AC 66 ms
6,944 KB
testcase_24 AC 46 ms
6,940 KB
testcase_25 AC 61 ms
6,940 KB
testcase_26 AC 59 ms
6,940 KB
testcase_27 AC 76 ms
7,040 KB
testcase_28 AC 72 ms
7,168 KB
testcase_29 AC 42 ms
6,944 KB
testcase_30 AC 46 ms
6,940 KB
testcase_31 AC 65 ms
6,940 KB
testcase_32 AC 49 ms
6,944 KB
testcase_33 AC 60 ms
6,940 KB
testcase_34 AC 54 ms
6,944 KB
testcase_35 AC 77 ms
7,128 KB
testcase_36 AC 42 ms
6,940 KB
testcase_37 AC 72 ms
7,028 KB
testcase_38 AC 73 ms
7,040 KB
testcase_39 AC 60 ms
6,944 KB
testcase_40 AC 41 ms
6,944 KB
testcase_41 AC 43 ms
6,944 KB
testcase_42 AC 59 ms
6,944 KB
testcase_43 AC 37 ms
6,940 KB
testcase_44 AC 37 ms
6,944 KB
testcase_45 AC 38 ms
6,940 KB
testcase_46 AC 37 ms
6,944 KB
testcase_47 AC 37 ms
6,944 KB
testcase_48 AC 37 ms
6,940 KB
testcase_49 AC 37 ms
6,940 KB
testcase_50 AC 37 ms
6,940 KB
testcase_51 AC 36 ms
6,944 KB
testcase_52 AC 38 ms
6,944 KB
testcase_53 AC 37 ms
6,940 KB
testcase_54 AC 37 ms
6,940 KB
testcase_55 AC 37 ms
6,940 KB
testcase_56 AC 37 ms
6,940 KB
testcase_57 AC 37 ms
6,940 KB
testcase_58 AC 37 ms
6,940 KB
testcase_59 AC 37 ms
6,944 KB
testcase_60 AC 37 ms
6,940 KB
testcase_61 AC 36 ms
6,944 KB
testcase_62 AC 37 ms
6,944 KB
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 #

//
//
//  Codeforces: ganariya
//  AtCoder: ganariya2525
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//  MMMMMMMMMMMMMMMMMMMMMMBttwOtttttttttttttlllllllll========?????????>>>>>>;;;;;<TMMMMMMMMMMMMMMMMMMMMM
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//include
//------------------------------------------
#include <vector>
#include <list>
#include <map>
#include <unordered_map>
#include <climits>
#include <set>
#include <unordered_set>
#include <deque>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <cctype>
#include <string>
#include <cstring>
#include <ctime>
#include <queue>
#include <random>
#include <complex>
#include <regex>
#include <locale>
#include <random>
#include <type_traits>

using namespace std;

#define SHOW_VECTOR(v) {std::cerr << #v << "\t:";for(const auto& xxx : v){std::cerr << xxx << " ";}std::cerr << "\n";}
#define SHOW_MAP(v){std::cerr << #v << endl; for(const auto& xxx: v){std::cerr << xxx.first << " " << xxx.second << "\n";}}

using LL = long long;

//~~~~~~~~~~~~~~~~~~~~~_(^~^ 」 ∠)_~~~~~~~~~~~~~~~~~~~~~

constexpr LL mod = 1e9 + 7;

LL fac[200020];
LL inv[200020];

LL pow_mod(LL n, LL p) {
    LL ret = 1;
    while (p > 0) {
        if (p & 1) ret = (ret * n) % mod;
        n = (n * n) % mod;
        p >>= 1;
    }
    return ret;
}

void prepare() {
    fac[0] = fac[1] = 1LL;
    inv[0] = inv[1] = 1LL;
    for (LL i = 2; i <= 200008; i++) {
        fac[i] = (fac[i - 1] * i) % mod;
        inv[i] = pow_mod(fac[i], mod - 2);
    }
}

LL ncr_mod(LL n, LL r) {
    return fac[n] * inv[n - r] % mod * inv[r] % mod;
}

int main() {

    int N;
    cin >> N;

    vector<LL> a(N);
    for (int i = 0; i < N; i++) cin >> a[i];

    prepare();

    LL ans = 0;
    for (int i = 0; i < N; i++) {
        ans += a[i] * ncr_mod(N - 1, i);
        ans %= mod;
    }

    cout << ans << endl;

    return 0;
}














































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