Submission #117941

#	Time	Username	Problem	Language	Result	Execution time	Memory
117941		JohnTitor	Art Exhibition (JOI18_art)	C++11	100 / 100	192 ms	21036 KiB

art

#include <bits/stdc++.h>
using namespace std;
#define FOR(i, j, k) for(int i=(j); i<=(k); i++)
#define FFOR(i, j, k) for(int i=(j); i<(k); i++)
#define DFOR(i, j, k) for(int i=(j); i>=(k); i--)
#define bug(x) cerr<<#x<<" = "<<(x)<<'\n'
#define pb push_back
#define mp make_pair
#define bit(s, i) (((s)>>(i))&1LL)
#define mask(i) ((1LL<<(i)))
#define builtin_popcount __builtin_popcountll
#define __builtin_popcount __builtin_popcountll
using ll=long long; using ld=long double;
mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count()); const ld pi=acos(0)*2;
template <typename T> inline void read(T &x){char c; bool nega=0; while((!isdigit(c=getchar()))&&(c!='-')); if(c=='-'){nega=1; c=getchar();} x=c-48; while(isdigit(c=getchar())) x=x*10+c-48; if(nega) x=-x;}
template <typename T> inline void writep(T x){if(x>9) writep(x/10); putchar(x%10+48);}
template <typename T> inline void write(T x){if(x<0){ putchar('-'); x=-x;} writep(x);}
template <typename T> inline void writeln(T x){write(x); putchar('\n');}
#define taskname "Art"
int n;
class art{
public:
    ll a, b;
    void input(){
        read(a);
        read(b);
    }
};
vector <art> v;
int main(){
    #ifdef Aria
        if(fopen(taskname".in", "r"))
            freopen(taskname".in", "r", stdin);
    #endif // Aria
    read(n);
    v.resize(n);
    for(auto &x: v) x.input();
    sort(v.begin(), v.end(), [](art A, art B){
        return A.a<B.a;
    });
    ll m=-1e18;
    ll ans=-1e18;
    ll sum=0;
    ///start from i to j
    ///(sum[j]-sum[i-1])-(a[j]-a[i])
    ///(sum[j]-a[j])+(a[i]-sum[i-1])
    for(auto x: v){
        ans=max(ans, (sum+x.b)-x.a+m);
        ans=max(ans, x.b);
        m=max(m, x.a-sum);
        sum+=x.b;
    }
    writeln(ans);
}

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