結果

問題 No.293 4>7の世界
コンテスト
ユーザー otsnsk
提出日時 2015-10-27 17:38:22
言語 C++11
(gcc 15.2.0 + boost 1.89.0)
コンパイル:
g++-15 -O2 -lm -std=gnu++11 -Wuninitialized -DONLINE_JUDGE -o a.out _filename_
実行:
./a.out
結果
WA  
実行時間 -
コード長 1,082 bytes
記録
記録タグの例:
初AC ショートコード 純ショートコード 純主流ショートコード 最速実行時間
コンパイル時間 409 ms
コンパイル使用メモリ 91,996 KB
実行使用メモリ 7,976 KB
最終ジャッジ日時 2026-04-04 03:12:13
合計ジャッジ時間 1,199 ms
ジャッジサーバーID
（参考情報） 		judge2_0 / judge3_0
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 4
other AC * 13 WA * 7
権限があれば一括ダウンロードができます
コンパイルメッセージ
In file included from /home/linuxbrew/.linuxbrew/Cellar/gcc/15.2.0_1/include/c++/15/string:56,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc/15.2.0_1/include/c++/15/bits/locale_classes.h:42,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc/15.2.0_1/include/c++/15/bits/ios_base.h:43,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc/15.2.0_1/include/c++/15/ios:46,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc/15.2.0_1/include/c++/15/bits/ostream.h:43,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc/15.2.0_1/include/c++/15/ostream:42,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc/15.2.0_1/include/c++/15/iostream:43,
                 from main.cpp:1:
In member function 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::pointer std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::_M_data() const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]',
    inlined from 'const _CharT* std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::data() const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]' at /home/linuxbrew/.linuxbrew/Cellar/gcc/15.2.0_1/include/c++/15/bits/basic_string.h:2887:23,
    inlined from 'std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const __cxx11::basic_string<_CharT, _Traits, _Alloc>&) [with _CharT = char; _Traits = char_traits<char>; _Alloc = allocator<char>]' at /home/linuxbrew/.linuxbrew/Cellar/gcc/15.2.0_1/include/c++/15/bits/basic_string.h:4372:30,
    inlined from 'int main()' at main.cpp:48:18:
/home/linuxbrew/.linuxbrew/Cellar/gcc/15.2.0_1/include/c++/15/bits/basic_string.h:239:28: warning: 'ans' may be used uninitialized [-Wmaybe-uninitialized]
  239 |       { return _M_dataplus._M_p; }
      |                            ^~~~
main.cpp: In function 'int main()':
main.cpp:33:17: note: 'ans' was declared here
   33 |         string *ans;
      |

ソースコード

diff #
raw source code 

#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <sstream>

#define FORR(i,b,e) for(int i=(b);i<(int)(e);++i)
#define FOR(i,e) FORR(i,0,e)
#define ALL(c) begin(c), end(c)
#define dump(var) cerr << #var ": " << var << "\n"
#define dumpc(con) for(auto& e: con) cerr << e << " "; cerr<<"\n"

using namespace std;

int str_to_ll(const string &s) {
    istringstream buf(s);
    int v;
    buf >> v;
    return v;
}

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);

    string A, B;
    cin >> A >> B;

    if (A.size() != B.size()) {
        cout << (A.size()>B.size()? A: B) << endl;
    }
    else {
        string *ans;
        FOR(i, A.size()) {
            if (A[i] == '4' && B[i] == '7') {
                ans = &A;
                break;
            }
            else if (A[i] == '7' && B[i] == '4') {
                ans = &B;
                break;
            }
            else {
                ans = A[i]>B[i]? &A: &B;
                break;
            }
        }
        cout << *ans << endl;
    }
    
    return 0;
}
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