Submission #435297

#	Time	Username	Problem	Language	Result	Execution time	Memory
435297		NicolaAbusaad2014	Distributing Candies (IOI21_candies)	C++17	0 / 100	159 ms	21832 KiB

candies

/**
 * Prof.Nicola
**/
#include <bits/stdc++.h>
#include "candies.h"
using namespace std;
#define endl "\n"
#define mp make_pair
#define F first
#define S second
#define REP(i,l,r) for(long long i=(l);i<(r);i++)
#define PER(i,l,r) for(long long i=(r)-1;i>=(l);i--)
const long dx[4]={1,0,-1,0},dz[4]={0,1,0,-1};
const long double pi=3.14159265359;
const long long mod=1e9+7;
long long p(long long x){while(x&(x-1)){x=x&(x-1);}return x;}
template<class T>void re(T&x){cin>>x;}
template<class T1,class T2> void re(pair<T1,T2>&x){re(x.first);re(x.second);}
template<class T>void re(vector<T>&x){for(long i=0;i<x.size();i++){re(x[i]);}}
template<class T>void re(deque<T>&x){for(long i=0;i<x.size();i++){re(x[i]);}}
template<class T>void out(T x){cout<<x<<" ";}
template<class T1,class T2>void out(pair<T1,T2>x){out(x.first);out(x.second);cout<<endl;}
template<class T>void out(vector<T>x,long l=0,long r=0){if(!r){r=x.size();}for(long i=l;i<r;i++){out(x[i]);}cout<<endl;}
template<class T>void out(deque<T>x,long l=0,long r=0){if(!r){r=x.size();}for(long i=l;i<r;i++){out(x[i]);}cout<<endl;}
template<class T>T cross(complex<T>x,complex<T>z){return (conj(x)*z).imag();}
template<class T>T dot(complex<T>x,complex<T>z){return (conj(x)*z).real();}
long q;
struct segment_tree1
{
    vector<long long>tree;
    long long operation(long long x,long long z)
    {
        return max(x,z);
    }
    void build(vector<long long>v)
    {
        tree.clear();
        long long x=v.size();
        while(x&(x-1)){
            x=x&(x-1);
        }
        if(v.size()!=x){
            x*=2;
        }
        tree.resize(x*2);
        tree[0]=x;
        for(long i=0;i<v.size();i++){
            tree[i+x]=v[i];
        }
        for(long i=x-1;i>0;i--){
            tree[i]=operation(tree[i*2],tree[(i*2)+1]);
        }
    }
    long long get(long long l,long long r)
    {
        l+=tree[0];
        r+=tree[0];
        long long ans=0;
        while(l<=r){
            if(l%2==1){
                ans=operation(ans,tree[l]);
            }
            if(r%2==0){
                ans=operation(ans,tree[r]);
            }
            l++;
            l/=2;
            r--;
            r/=2;
        }
        return ans;
    }
    void update(long long x,long long z)
    {
        x+=tree[0];
        tree[x]=z;
        x/=2;
        while(x>0){
            tree[x]=operation(tree[x*2],tree[(x*2)+1]);
            x/=2;
        }
    }
};
struct segment_tree2
{
    vector<long long>tree;
    long long operation(long long x,long long z)
    {
        return min(x,z);
    }
    void build(vector<long long>v)
    {
        tree.clear();
        long long x=v.size();
        while(x&(x-1)){
            x=x&(x-1);
        }
        if(v.size()!=x){
            x*=2;
        }
        tree.resize(x*2);
        tree[0]=x;
        for(long i=0;i<v.size();i++){
            tree[i+x]=v[i];
        }
        for(long i=x-1;i>0;i--){
            tree[i]=operation(tree[i*2],tree[(i*2)+1]);
        }
    }
    long long get(long long l,long long r)
    {
        l+=tree[0];
        r+=tree[0];
        long long ans=1e9;
        while(l<=r){
            if(l%2==1){
                ans=operation(ans,tree[l]);
            }
            if(r%2==0){
                ans=operation(ans,tree[r]);
            }
            l++;
            l/=2;
            r--;
            r/=2;
        }
        return ans;
    }
    void update(long long x,long long z)
    {
        x+=tree[0];
        tree[x]=z;
        x/=2;
        while(x>0){
            tree[x]=operation(tree[x*2],tree[(x*2)+1]);
            x/=2;
        }
    }
};
segment_tree1 a;
segment_tree2 b;
long mx(long x)
{
    long l=x,r=q-1,mid;
    while(l<r){
        mid=(l+r)/2;
        if(a.get(l,mid)<=a.get(mid+1,r)){
            l=mid+1;
        }
        else{
            r=mid;
        }
    }
    return l;
}
long mn(long x)
{
    long l=x,r=q-1,mid;
    while(l<r){
        mid=(l+r)/2;
        if(b.get(l,mid)>=b.get(mid+1,r)){
            l=mid+1;
        }
        else{
            r=mid;
        }
    }
    return l;
}
std::vector<int> distribute_candies(std::vector<int> c, std::vector<int> l,std::vector<int> r, std::vector<int> v) {
    int n = c.size();
    q=v.size();
    std::vector<int> s(n);
    long long now=0,sub=0,p1,p2,x=0;
    vector<pair<long long,long> >srtd(n);
    REP(i,0,n){
        srtd[i]=mp(c[i],i);
    }
    sort(srtd.rbegin(),srtd.rend());
    vector<long long>sum(q);
    REP(i,0,q){
        x+=v[i];
        x=min(x,(long long)srtd[0].first);
        x=max(0ll,x);
        sum[i]=x;
    }
    a.build(sum);
    b.build(sum);
    x=0;
    while(now<n&&x<q){
        while(now<n&&x<q){
            p1=mx(x);
            p2=mn(p1);
            while(now<n&&sum[p1]-sub<=srtd[now].first){
                s[srtd[now].second]=sum[q-1]-sub;
                now++;
            }
            if(now>=n){
                break;
            }
            sub+=min(sum[p1]-sub-c[now],sum[p2]-sub);
            if(sum[p2]-sub==0){
                x=p2+1;
            }
            else{
                break;
            }
        }
        if(now<n){
            s[srtd[now].second]=sum[q-1]-sub;
        }
        now++;
    }
    return s;
}

Compilation message (stderr)

candies.cpp: In member function 'void segment_tree1::build(std::vector<long long int>)':
candies.cpp:42:20: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   42 |         if(v.size()!=x){
      |            ~~~~~~~~^~~
candies.cpp:47:23: warning: comparison of integer expressions of different signedness: 'long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |         for(long i=0;i<v.size();i++){
      |                      ~^~~~~~~~~
candies.cpp: In member function 'void segment_tree2::build(std::vector<long long int>)':
candies.cpp:98:20: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   98 |         if(v.size()!=x){
      |            ~~~~~~~~^~~
candies.cpp:103:23: warning: comparison of integer expressions of different signedness: 'long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  103 |         for(long i=0;i<v.size();i++){
      |                      ~^~~~~~~~~

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