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 2019-03-15 21:51:55
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 216 ms / 2,000 ms
コード長 7,377 bytes
コンパイル時間 1,433 ms
コンパイル使用メモリ 143,648 KB
実行使用メモリ 24,100 KB
最終ジャッジ日時 2024-07-01 20:50:38
合計ジャッジ時間 15,570 ms
ジャッジサーバーID
(参考情報)
judge3 / judge2
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 173 ms
22,264 KB
testcase_01 AC 173 ms
21,624 KB
testcase_02 AC 174 ms
22,148 KB
testcase_03 AC 215 ms
21,496 KB
testcase_04 AC 215 ms
23,364 KB
testcase_05 AC 213 ms
22,584 KB
testcase_06 AC 214 ms
22,472 KB
testcase_07 AC 215 ms
21,416 KB
testcase_08 AC 214 ms
22,816 KB
testcase_09 AC 214 ms
21,772 KB
testcase_10 AC 213 ms
23,264 KB
testcase_11 AC 212 ms
22,284 KB
testcase_12 AC 213 ms
21,716 KB
testcase_13 AC 213 ms
22,296 KB
testcase_14 AC 213 ms
22,784 KB
testcase_15 AC 213 ms
22,372 KB
testcase_16 AC 214 ms
22,940 KB
testcase_17 AC 215 ms
22,344 KB
testcase_18 AC 214 ms
22,408 KB
testcase_19 AC 214 ms
24,100 KB
testcase_20 AC 213 ms
23,076 KB
testcase_21 AC 214 ms
21,784 KB
testcase_22 AC 216 ms
22,944 KB
testcase_23 AC 202 ms
22,148 KB
testcase_24 AC 182 ms
21,120 KB
testcase_25 AC 198 ms
22,052 KB
testcase_26 AC 197 ms
22,416 KB
testcase_27 AC 213 ms
22,652 KB
testcase_28 AC 208 ms
22,408 KB
testcase_29 AC 179 ms
21,804 KB
testcase_30 AC 181 ms
21,756 KB
testcase_31 AC 202 ms
21,496 KB
testcase_32 AC 185 ms
22,724 KB
testcase_33 AC 197 ms
21,984 KB
testcase_34 AC 189 ms
22,516 KB
testcase_35 AC 212 ms
22,808 KB
testcase_36 AC 177 ms
22,500 KB
testcase_37 AC 207 ms
21,584 KB
testcase_38 AC 208 ms
22,940 KB
testcase_39 AC 198 ms
21,140 KB
testcase_40 AC 178 ms
22,340 KB
testcase_41 AC 180 ms
22,644 KB
testcase_42 AC 195 ms
22,112 KB
testcase_43 AC 172 ms
21,268 KB
testcase_44 AC 172 ms
21,964 KB
testcase_45 AC 173 ms
21,656 KB
testcase_46 AC 173 ms
21,164 KB
testcase_47 AC 173 ms
21,088 KB
testcase_48 AC 172 ms
21,876 KB
testcase_49 AC 172 ms
20,860 KB
testcase_50 AC 172 ms
21,800 KB
testcase_51 AC 172 ms
21,016 KB
testcase_52 AC 172 ms
20,908 KB
testcase_53 AC 173 ms
22,108 KB
testcase_54 AC 173 ms
21,732 KB
testcase_55 AC 173 ms
21,068 KB
testcase_56 AC 174 ms
23,492 KB
testcase_57 AC 173 ms
21,884 KB
testcase_58 AC 173 ms
20,748 KB
testcase_59 AC 172 ms
20,984 KB
testcase_60 AC 172 ms
22,784 KB
testcase_61 AC 172 ms
21,048 KB
testcase_62 AC 173 ms
21,844 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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//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[2000010];
LL inv[2000010];

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 <= 1000008; i++) {
        fac[i] = (fac[i - 1] * i) % mod;
        inv[i] = pow_mod(fac[i], mod - 2);
    }
}

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

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 += ncr_mod(N - 1, i) * a[i];
        ans %= mod;
    }


    cout << ans << endl;

    return 0;
}














































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