結果

問題 No.817 Coin donation
ユーザー mugen_1337mugen_1337
提出日時 2020-05-13 20:25:19
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 29 ms / 2,000 ms
コード長 1,127 bytes
コンパイル時間 2,054 ms
コンパイル使用メモリ 194,496 KB
最終ジャッジ日時 2025-01-10 10:48:26
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
(要ログイン)
ファイルパターン 結果
sample AC * 2
other AC * 14
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 /usr/include/c++/13/istream:41,
                 from /usr/include/c++/13/sstream:40,
                 from /usr/include/c++/13/complex:45,
                 from /usr/include/c++/13/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:127,
                 from main.cpp:1:
In member function ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long long int) [with _CharT = char; _Traits = std::char_traits<char>]’,
    inlined from ‘int main()’ at main.cpp:44:11:
/usr/include/c++/13/ostream:204:25: warning: ‘res’ may be used uninitialized [-Wmaybe-uninitialized]
  204 |       { return _M_insert(__n); }
      |                ~~~~~~~~~^~~~~
main.cpp: In function ‘int main()’:
main.cpp:34:25: note: ‘res’ was declared here
   34 |     ll lw=0,hi=10ll*INF,res;
      |                         ^~~

ソースコード

diff #

#include<bits/stdc++.h>
using namespace std;
#define ALL(x) x.begin(),x.end()
#define rep(i,n) for(int i=0;i<(n);i++)
#define debug(v) cout<<#v<<":";for(auto x:v){cout<<x<<' ';}cout<<endl;
#define INF 1000000000
#define mod 1000000007
using ll=long long;
const ll LINF=1001002003004005006ll;
int dx[]={1,0,-1,0};
int dy[]={0,1,0,-1};
// ll gcd(ll a,ll b){return b?gcd(b,a%b):a;}
template<class T>bool chmax(T &a,const T &b){if(a<b){a=b;return true;}return false;}
template<class T>bool chmin(T &a,const T &b){if(b<a){a=b;return true;}return false;}

signed main(){
    cin.tie(0);
    ios::sync_with_stdio(0);
    
    int n;ll k;cin>>n>>k;
    vector<pair<ll,ll>> v(n);
    rep(i,n){
        cin>>v[i].first>>v[i].second;
    }
    
    auto check=[&](ll m){
        ll cnt=0;
        rep(i,n){
            cnt+=max(0ll,min(m,v[i].second)-v[i].first+1);
        }
        return cnt>=k;
    };

    ll lw=0,hi=10ll*INF,res;
    while(lw<=hi){
        ll mid=(lw+hi)/2;
        if(check(mid)){
            res=mid;
            hi=mid-1;
        }else{
            lw=mid+1;
        }
    }
    cout<<res<<endl;
    return 0;
}
0