제출 #394762

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
394762		juggernaut	Art Exhibition (JOI18_art)	C++14	100 / 100	216 ms	21844 KiB

art

#include<bits/stdc++.h>
//#include<bits/extc++.h>
#define fr first
#define sc second
using namespace std;
void usaco(string s){freopen((s+".in").c_str(),"r",stdin);freopen((s+".out").c_str(),"w",stdout);}
//using namespace __gnu_pbds;
typedef long long ll;
//template<class T>using ordered_set=tree<T,null_type,less<T>,rb_tree_tag,tree_order_statistics_node_update>;
template<class T>void umin(T &a,T b){if(b<a)a=b;}
template<class T>void umax(T &a,T b){if(a<b)a=b;}
#ifdef IOI2021SG
    #define printl(args...)printf(args)
#else
    #define printl(args...)((void)0)
#endif
pair<ll,ll>p[500005];
ll pref[500005];
int n;
int main(){
    scanf("%d",&n);
    for(int i=1;i<=n;i++)scanf("%lld%lld",&p[i].fr,&p[i].sc);
    sort(p+1,p+1+n);
    ll mx=0,ans=0;
    for(int i=1;i<=n;i++){
        pref[i]=pref[i-1]+p[i].sc;
        umax(mx,p[i].fr-pref[i-1]);
        umax(ans,pref[i]-p[i].fr+mx);
    }
    printf("%lld",ans);
}

컴파일 시 표준 에러 (stderr) 메시지

art.cpp: In function 'void usaco(std::string)':
art.cpp:6:29: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
    6 | void usaco(string s){freopen((s+".in").c_str(),"r",stdin);freopen((s+".out").c_str(),"w",stdout);}
      |                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
art.cpp:6:66: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
    6 | void usaco(string s){freopen((s+".in").c_str(),"r",stdin);freopen((s+".out").c_str(),"w",stdout);}
      |                                                           ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
art.cpp: In function 'int main()':
art.cpp:21:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   21 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
art.cpp:22:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   22 |     for(int i=1;i<=n;i++)scanf("%lld%lld",&p[i].fr,&p[i].sc);
      |                          ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 50 / 50