結果

問題 No.723 2つの数の和
ユーザー ganariyaganariya
提出日時 2019-03-16 20:49:20
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 72 ms / 2,000 ms
コード長 6,900 bytes
コンパイル時間 1,181 ms
コンパイル使用メモリ 149,392 KB
実行使用メモリ 9,400 KB
最終ジャッジ日時 2023-09-17 04:25:43
合計ジャッジ時間 3,255 ms
ジャッジサーバーID
(参考情報)
judge15 / judge13
このコードへのチャレンジ(β)

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 2 ms
4,380 KB
testcase_01 AC 1 ms
4,380 KB
testcase_02 AC 2 ms
4,380 KB
testcase_03 AC 54 ms
7,508 KB
testcase_04 AC 68 ms
8,044 KB
testcase_05 AC 64 ms
8,272 KB
testcase_06 AC 65 ms
8,012 KB
testcase_07 AC 28 ms
6,192 KB
testcase_08 AC 32 ms
6,440 KB
testcase_09 AC 71 ms
8,832 KB
testcase_10 AC 28 ms
5,840 KB
testcase_11 AC 6 ms
4,380 KB
testcase_12 AC 39 ms
6,856 KB
testcase_13 AC 72 ms
9,400 KB
testcase_14 AC 18 ms
5,356 KB
testcase_15 AC 29 ms
6,656 KB
testcase_16 AC 44 ms
7,692 KB
testcase_17 AC 59 ms
8,596 KB
testcase_18 AC 14 ms
4,376 KB
testcase_19 AC 26 ms
4,376 KB
testcase_20 AC 1 ms
4,380 KB
testcase_21 AC 2 ms
4,380 KB
testcase_22 AC 1 ms
4,380 KB
testcase_23 AC 54 ms
8,016 KB
testcase_24 AC 22 ms
5,768 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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//  MMMMMMMMMMMMMMMMMMMMMMMMMMMMMM9Olll=l======??????????>>>>>>;;;;;;;;;:;?TMMMMMMMMMMMMMMMMMMMMMMMMMMMM
//  MMMMMMMMMMMMMMMMMMMMMMMMMMM9ttlllllllll=l=======?????????>>>>>>;;;;;;;;;;?TMMMMMMMMMMMMMMMMMMMMMMMMM
//  MMMMMMMMMMMMMMMMMMMMMMMMBOttOtttttltlllllllll=======??????????>>>>>>>;;;;;;?TMMMMMMMMMMMMMMMMMMMMMMM
//  MMMMMMMMMMMMMMMMMMMMMMBttwOtttttttttttttlllllllll========?????????>>>>>>;;;;;<TMMMMMMMMMMMMMMMMMMMMM
//  MMMMMMMMMMMMMMMMMMMMBrwZrttttttttttttttttttlllllllllll======???????????>>>>>>;;?HMMMMMMMMMMMMMMMMMMM
//  MMMMMMMMMMMMMMMMMMMSw0trtrrtrtrttrtttttttttttttlllOllllll========????<<zz??>>>>>>ZMMMMMMMMMMMMMMMMMM
//  MMMMMMMMMMMMMMMMMMX0ttrtrOOttrttrttOOttttttttttttltwllllllllll========??wy?????>>>vZMMMMMMMMMMMMMMMM
//  MMMMMMMMMMMMMMMMM0ttrI+wV1rtttttttwZtttttttltttOwylOXOllllllllllll=l====1dkz???????vZdMMMMMMMMMMMMMM
//  MMMMMMMMMMMMMMMSrrwrtwZCjttttttttwSttOlllltllllwtXOlZkOlllllllllllllll==z+dk===?????X2JMMMMMMMMMMMMM
//  MMMMMMMMMMMMMBrtwwtrw0<jttttttttOXllOttltllttllOZwHOtXkyltlllllllllllllll<+XZ======?dk?JMMMMMMMMMMMM
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//  MMMMMMMMMMMMMMMMNOtXtdMMMMMNxzZMMNmgHyVVVVVW%..?/(.,(x-..........(HfffpffpffpffWHHffpffppfVyyWMMMMMM


//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;

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


int main() {

    int N, X;
    cin >> N >> X;

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

    map<int, int> m;
    for (int i = 0; i < N; i++) m[a[i]]++;

    LL ans = 0;
    for (int i = 0; i < N; i++) {
       // m[a[i]]--;
        ans += m[X - a[i]];
     //   m[a[i]]++;
    }

    cout << ans;

    return 0;
}














































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