Submission #296131

#	Time	Username	Problem	Language	Result	Execution time	Memory
296131		Autoratch	모임들 (IOI18_meetings)	C++14	0 / 100	1 ms	384 KiB

meetings

#include "meetings.h"
#include <bits/stdc++.h>
using namespace std;

const int N = 1 << 17;

int n;
long long ml[N],mr[N];
vector<int> a;
struct node
{
    int pre,suf,mxa,all;
    friend node operator+(const node &a,const node &b)
    {
        node ret;
        if(a.all) ret.pre = a.all+b.pre;
        else ret.pre = a.pre;
        if(b.all) ret.suf = a.suf+b.all;
        else ret.suf = b.suf;
        ret.mxa = max(max(a.mxa,b.mxa),a.suf+b.pre);
        if(!a.all or !b.all) ret.all = 0;
        else ret.all = 1;
        return ret;
    }
}tree[N << 1];

void build(int l,int r,int idx)
{
    if(l==r) return void(tree[idx] = {a[l],a[l],a[l],a[l]});
    int m = (l+r)/2;
    build(l,m,idx*2),build(m+1,r,idx*2+1);
    tree[idx] = tree[idx*2]+tree[idx*2+1];
}

node read(int l,int r,int idx,int x,int y)
{
    if(x>r or y<l) return {0,0,0,0};
    if(x<=l and y>=r) return tree[idx];
    int m = (l+r)/2;
    return read(l,m,idx*2,x,y)+read(m+1,r,idx*2+1,x,y);
}

vector<long long> minimum_costs(vector<int> H,vector<int> L,vector<int> R) 
{
    int Q = L.size();
    vector<long long> C(Q);
    a = H;
    n = a.size();
    build(0,n-1,1);
    for(int j = 0; j < Q; ++j) {
        int l = L[j],r = R[j];
        long long ans = LLONG_MAX;
        int tmp = read(0,n-1,1,l,r).mxa;
        ans = tmp+(r-l+1-tmp)*2;
        /*
        ml[l] = H[l]; int nh = H[l];
        for(int i = l+1;i <= r;i++)
        {
            if(H[i]>nh) nh = H[i],ml[i] = (i-l+1)*nh;
            else ml[i] = ml[i-1]+;
        }
        mr[r] = H[r],nh = H[r];
        for(int i = r-1;i >= l;i--)
        {
            if(H[i]>nh) nh = H[i],mr[i] = (r-i+1)*nh;
            else mr[i] = mr[i+1]+nh;
        }
        for(int i = l;i <= r;i++)
        {
            cout << ml[i] << ' ' << mr[i] << endl;
            ans = min(ans,ml[i]+mr[i]-H[i]);
        }
        */
        C[j] = ans;
    }
    return C;
}

• Subtask 1: 0 / 4
• Subtask 2: 0 / 15
• Subtask 3: 0 / 17
• Subtask 4: 0 / 24
• Subtask 5: 0 / 40