제출 #1283827

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1283827		huyngodzz	Art Exhibition (JOI18_art)	C++20	100 / 100	152 ms	12108 KiB

art

///huynhocute123///
#include<bits/stdc++.h>
using namespace std;
#define S second
#define F first
#define pii pair<int,int>
#define piii pair<int,pair<int,int>>
#define pb push_back
#define FOR(i, a, b) for(int i = a; i <= b; ++i)
#define REP(i, a, b) for(int i = b; i >= a; --i)
#define ALL(v) v.begin(),v.end()
#define inp(name) if(fopen(name, "r")) freopen(name, "r", stdin);
#define out(name) if(fopen(name, "w")) freopen(name, "w", stdout);
//random_device rd;
//mt19937 rng(rd());
//#pragma GCC optimize ("O3")
//#pragma GCC optimize ("unroll-loops")
//#pragma GCC target("popcnt")
//#define int long long
const int MAX = 1e9+9;
const long long  MAXLL = 1e18+9;
const double pi = 3.14159265358979323846;
const double rad = 3.14159265358979323846 /180;
bool minimize(int &u, int v){
    if(v < u){
        u = v;
        return 1;
    }
    return 0;
}
bool maximize(int &u, int v){
    if(v > u){
        u = v;
        return 1;
    }
    return 0;
}
bool maximizell(long long &u, long long v){
    if(v > u){
        u = v;
        return 1;
    }
    return 0;
}
bool minimizell(long long &u, long long v){
    if(v < u){
        u = v;
        return 1;
    }
    return 0;
}
const int  mod = 1e9 + 7;
inline int fastPow(int a, int n){
    if(n == 0) return 1;
    int t = fastPow(a, n >> 1);
    t = 1ll * t * t % mod;
    if(n & 1) t = 1ll * t * a % mod;
    return t;
}
const int maxN =5 * 1e5 + 999 ;
int n;
struct art{
    long long Size ,Value;
    bool operator < (const art& rhs)const{
        return Size < rhs.Size;
    }
}Art[maxN];
long long pref[maxN];
inline void solve(){
    cin >> n;
    FOR(i, 1, n)cin >>  Art[i].Size  >> Art[i].Value;
    sort(Art + 1, Art + 1 + n);
    long long res = -MAXLL;
    FOR(i, 1, n)pref[i] = pref[i - 1] + Art[i].Value;
    long long kk = -MAXLL;
    REP(i , 1, n){
        maximizell(kk , pref[i] - Art[i].Size);
        maximizell(res, kk - pref[i - 1] + Art[i].Size);
    }
    cout << res ;
}
signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    #define NAME "task"
    if(fopen(NAME".inp", "r")){
        freopen(NAME".inp", "r" ,stdin);
//        freopen(NAME".out", "w" ,stdout);
    }
    int tc = 1;
   // cin >> tc;
    while( tc-- )solve();
    cerr << '\n' << "Time elapsed: " << (1.0 * clock() / CLOCKS_PER_SEC) << " s\n" ;


}

컴파일 시 표준 에러 (stderr) 메시지

art.cpp: In function 'int main()':
art.cpp:88:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   88 |         freopen(NAME".inp", "r" ,stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

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