Submission #1271957

#	Time	Username	Problem	Language	Result	Execution time	Memory
1271957		nerrrmin	사탕 분배 (IOI21_candies)	C++20	0 / 100	678 ms	19696 KiB

candies

#include "candies.h"

#include <bits/stdc++.h>
using namespace std;
const int maxn = 2e5 + 10;
int n, q;
int r[maxn];
long long a[maxn];
long long p[maxn];
long long tmax[maxn * 4], tmin[maxn * 4];
void build(long long i, long long l, long long r)
{
    if(l == r)
    {
        tmin[i] = p[l];
        tmax[i] = p[l];

        return;
    }
    long long mid = (l + r)/2;
    build(2*i, l, mid);
    build(2*i+1, mid+1, r);
    tmin[i] = min(tmin[2*i], tmin[2*i+1]);
    tmax[i] = max(tmax[2*i], tmax[2*i+1]);

}
long long ql, qr;
long long query_max(long long i, long long l, long long r)
{
    if(qr < l || ql > r)return -1e17;
    if(ql <= l && r <= qr)return tmax[i];
    long long mid = (l + r)/2;
    return max(query_max(2*i, l, mid), query_max(2*i+1, mid+1, r));
}
long long query_min(long long i, long long l, long long r)
{
    if(qr < l || ql > r)return 1e17;
    if(ql <= l && r <= qr)return tmin[i];
    long long mid = (l + r)/2;
    return min(query_min(2*i, l, mid), query_min(2*i+1, mid+1, r));
}
int suff[maxn];
std::vector<int> distribute_candies(std::vector<int> c, std::vector<int> l,
                                    std::vector<int> r, std::vector<int> v) {
    n = c.size();
    q = l.size();
    std::vector<int> s(n, 0);
    /// fix l and r
    for (int i = 1; i <= n; ++ i)
        r[i] = c[i-1];
    for (int i = 1; i <= q; ++ i)
    {
        a[i] = v[i-1];
    }
    suff[q+1] = 0;
    for (int i = q; i >= 0; -- i)
    {
        suff[i] = suff[i+1] + a[i];
    }
    p[0] = 0;
    for (int i = 1; i <= q; ++ i)
        p[i] = p[i-1] + a[i];

    build(1, 0, q);
    for (int i = 1; i <= n; ++ i)
    {
        int lt = 0, rt = q, mid, ans = -1;

        while(lt <= rt)
        {
            mid = (lt + rt)/2;
            ql = mid;
            qr = q;
            int ansmin = query_min(1, 0, q);
            int ansmax = query_max(1, 0, q);

            if(ansmax - ansmin >= r[i])
            {
                ans = mid;
                lt = mid + 1;
            }
            else rt = mid - 1;
        }
        ans ++;
        //cout << ans << endl;
        int val = 0;
        if(ans != -1)
        {
            if(a[ans] > 0)val = r[i];
        }
        val += suff[ans+1];
        s[i-1] = val;
    }
    return s;
}

• Subtask 1: 0 / 3
• Subtask 2: 0 / 8
• Subtask 3: 0 / 27
• Subtask 4: 0 / 29
• Subtask 5: 0 / 33