Submission #729559

#	Time	Username	Problem	Language	Result	Execution time	Memory
729559		hoainiem	Rice Hub (IOI11_ricehub)	C++14	100 / 100	44 ms	4236 KiB

ricehub

#include <bits/stdc++.h>
#include "ricehub.h"
#define lc id<<1
#define rc id<<1^1
#define nmax 100008
using namespace std;
int n, mx, ans = 0, a[nmax];
long long k;
struct segtree{
    long long seg[nmax << 2];
    void build(int id = 1, int l = 1, int r = n){
        if (l == r){
            seg[id] = a[l];
            return;
        }
        int mid = (l + r) >> 1;
        build(lc, l, mid);
        build(rc, mid + 1, r);
        seg[id] = seg[lc] + seg[rc];
    }
    long long get(int u, int v, int id = 1, int l = 1, int r = n){
        if (r < u || l > v)
            return 0;
        if (u <= l && r <= v)
            return seg[id];
        int mid = (l + r) >> 1;
        return get(u, v, lc, l, mid) + get(u, v, rc, mid + 1, r);
    }
}tree;
long long cost(int l, int r){
    if (l == r)
        return 0;
    int mid = (l + r) >> 1;
    int xx = tree.get(l, mid);
    int yy = tree.get(mid + 1, r);
    return 1LL * a[mid] * (mid - l + 1) - tree.get(l, mid) + tree.get(mid + 1, r) - 1LL * a[mid] * (r - mid);
}
int besthub(int R, int L, int X[], long long B){
    n = R;
    mx = L;
    k = B;
    for (int i = 1; i <= n; i++)
        a[i] = X[i - 1];
    tree.build();
    for (int i = 1, j = 1; i <= n; i++){
        while (cost(j, i) > B)
            j++;
        ans = max(ans, i - j + 1);
    }
    return ans;
}

Compilation message (stderr)

ricehub.cpp: In function 'long long int cost(int, int)':
ricehub.cpp:34:9: warning: unused variable 'xx' [-Wunused-variable]
   34 |     int xx = tree.get(l, mid);
      |         ^~
ricehub.cpp:35:9: warning: unused variable 'yy' [-Wunused-variable]
   35 |     int yy = tree.get(mid + 1, r);
      |         ^~

• Subtask 1: 17 / 17
• Subtask 2: 25 / 25
• Subtask 3: 26 / 26
• Subtask 4: 32 / 32