Submission #875718

#	Time	Username	Problem	Language	Result	Execution time	Memory
875718		Isam	Art Exhibition (JOI18_art)	C++17	30 / 100	1064 ms	860 KiB

art

#include<bits/stdc++.h>

#define SPEED ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0)
#define int long long
#define a first
#define b second
#define pii pair<int, int>
using namespace std;

const int sz = 5005;

const int inf = 1e15 + 7;

int n, ans;

pii c[sz];

struct edge{
    int mn, mx, sm;
} t[sz << 2];

inline void push_up(int in){
    t[in].mx = max(t[in << 1].mx, t[in << 1 | 1].mx);
    t[in].mn = min(t[in << 1].mn, t[in << 1 | 1].mn);
    t[in].sm = t[in << 1].sm + t[in << 1 | 1].sm;
    return;
}

void build(int l, int r, int in){
    if(l == r){
        t[in] = (edge){c[l].a, c[l].a, c[l].b};
        return;
    }
    int mid = l + ((r - l) >> 1);
    build(l, mid, in << 1);
    build(mid + 1, r, in << 1 | 1);
    push_up(in);
    return;
}

int get_mn(int l, int r, int in, int L, int R){
    if(l > R || r < L) return inf;
    if(l >= L && r <= R) return t[in].mn;
    int mid = l + ((r - l) >> 1);
    return min(get_mn(l, mid, in << 1, L, R), get_mn(mid + 1, r, in << 1 | 1, L, R));
}

int get_mx(int l, int r, int in, int L, int R){
    if(l > R || r < L) return -inf;
    if(l >= L && r <= R) return t[in].mx;
    int mid = l + ((r - l) >> 1);
    return max(get_mx(l, mid, in << 1, L, R), get_mx(mid + 1, r, in << 1 | 1, L, R));
}

int get_sm(int l, int r, int in, int L, int R){
    if(l > R || r < L) return 0ll;
    if(l >= L && r <= R) return t[in].sm;
    int mid = l + ((r - l) >> 1);
    return get_sm(l, mid, in << 1, L, R) + get_sm(mid + 1, r, in << 1 | 1, L, R);
}

int comp(int mna, int mxa, int s){
    return s - (mxa - mna);
}

signed main(){
    SPEED;
    cin >> n;
    for(register int i = 1; i <= n; ++i){
        cin >> c[i].a >> c[i].b;
        c[i].b *= (-1);
    }
    sort(c+1, c+n+1);
    int l{1};
    for(register int i = 1; i <= n; ++i) c[i].b *= (-1);
    build(1, n, 1);
    for(register int i = 1; i < n; ++i){
        for(register int j = i; j <= n; ++j){
            int tmp = comp(get_mn(1, n, 1, i, j), get_mx(1, n, 1, i, j), get_sm(1, n, 1, i, j));
            ans = max(ans, tmp);
        }
    }
    cout << ans << '\n';
    return 0;
}

Compilation message (stderr)

art.cpp: In function 'int main()':
art.cpp:69:22: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   69 |     for(register int i = 1; i <= n; ++i){
      |                      ^
art.cpp:75:22: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   75 |     for(register int i = 1; i <= n; ++i) c[i].b *= (-1);
      |                      ^
art.cpp:77:22: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   77 |     for(register int i = 1; i < n; ++i){
      |                      ^
art.cpp:78:26: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   78 |         for(register int j = i; j <= n; ++j){
      |                          ^
art.cpp:74:9: warning: unused variable 'l' [-Wunused-variable]
   74 |     int l{1};
      |         ^

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 50