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Submission #446350

# Submission time Handle Problem Language Result Execution time Memory
446350 2021-07-21T15:57:52 Z arnold518 Distributing Candies (IOI21_candies) C++17
38 / 100
 5000 ms 1603696 KB 
#include "candies.h"
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int MAXN = 2e5;
const ll INF = 1e18;
const int SQ = 300;

struct Query
{
    int l, r, v;
};

int N, Q;
int A[MAXN+10];
Query B[MAXN+10];
int ans[MAXN+10];

int T1[MAXN+10], T2[MAXN+10];

void calc(int l, int r, vector<Query> B, vector<pii> V2)
{
    //printf("CALC %d %d\n", l, r);
    //for(auto it : B) printf("%d ", it.v); printf("\n");
    //for(int i=l; i<=r; i++) printf("%d ", ans[i]); printf("\n");

    l=max(l, 1); r=min(r, N);
    int Q=B.size();

    vector<ll> V;
    for(int i=0; i<Q; i++)
    {
        if(B[i].v>0)
        {
            ll x=0, y=0;
            while(!V.empty())
            {
                ll x2, y2;
                x2=V.back();
                if(V.size()%2) y2=x2-x+y;
                else y2=y;
                if(y2<x2-B[i].v)
                {
                    V.push_back(y2+B[i].v);
                    break;
                }
                else V.pop_back();
                x=x2; y=y2;
            }
            if(V.empty()) V.push_back(y+B[i].v);
        }
        else
        {
            ll x=0, y=0;
            while(!V.empty())
            {
                ll x2, y2;
                x2=V.back();
                if(V.size()%2) y2=x2-x+y;
                else y2=y;
                if(y2>-B[i].v)
                {
                    V.push_back(x2-y2-B[i].v);
                    break;
                }
                else V.pop_back();
                x=x2; y=y2;
            }
        }
    }

    int pt=0;
    ll x=0, y=0;
    while(!V.empty())
    {
        ll x2, y2;
        x2=V.back();
        if(V.size()%2) y2=x2-x+y;
        else y2=y;

        for(; pt<V2.size() && V2[pt].first<=x2; pt++)
        {
            if(V.size()%2) T1[V2[pt].second]=y2-x2+V2[pt].first;
            else T1[V2[pt].second]=y2;
        }

        V.pop_back();
        x=x2; y=y2;
    }

    for(; pt<V2.size(); pt++)
    {
        T1[V2[pt].second]=y;
    }

    //================================

    for(int i=0; i<Q; i++)
    {
        if(B[i].v>0)
        {
            ll x=0, y=0;
            while(!V.empty())
            {
                ll x2, y2;
                x2=V.back();
                if(V.size()%2) y2=y;
                else y2=x2-x+y;
                if(y2<x2-B[i].v)
                {
                    V.push_back(y2+B[i].v);
                    break;
                }
                else V.pop_back();
                x=x2; y=y2;
            }
        }
        else
        {
            ll x=0, y=0;
            while(!V.empty())
            {
                ll x2, y2;
                x2=V.back();
                if(V.size()%2) y2=y;
                else y2=x2-x+y;
                if(y2>-B[i].v)
                {
                    V.push_back(x2-y2-B[i].v);
                    break;
                }
                else V.pop_back();
                x=x2; y=y2;
            }
            if(V.empty()) V.push_back(-B[i].v-y+x);
        }
    }

    pt=0;
    x=0, y=0;
    while(!V.empty())
    {
        ll x2, y2;
        x2=V.back();
        if(V.size()%2) y2=y;
        else y2=x2-x+y;

        for(; pt<V2.size() && V2[pt].first<=x2; pt++)
        {
            if(V.size()%2) T2[V2[pt].second]=y2;
            else T2[V2[pt].second]=y2-x2+V2[pt].first;
        }

        V.pop_back();
        x=x2; y=y2;
    }
    for(; pt<V2.size(); pt++)
    {
        T2[V2[pt].second]=y-x+V2[pt].first;
    }

    //for(int i=l; i<=r; i++) printf("%d ", T1[i]); printf("T1\n");
    //for(int i=l; i<=r; i++) printf("%d ", T2[i]); printf("T2\n");

    ll t=0;
    for(int i=0; i<Q; i++) t+=B[i].v;

    for(int i=l; i<=r; i++)
    {
        if(T1[i]==T2[i]) ans[i]=T1[i];
        else
        {
            int l=T1[i]-t, r=T2[i]-t;
            if(ans[i]<=l) ans[i]=T1[i];
            else if(ans[i]>=r) ans[i]=T2[i];
            else ans[i]=ans[i]+t;
        }
    }
    //for(int i=l; i<=r; i++) printf("%d ", ans[i]); printf("\n");
}

vector<Query> BB[MAXN+10];

vector<int> distribute_candies(vector<int> _C, vector<int> _L, vector<int> _R, vector<int> _V)
{
    N=_C.size(); Q=_L.size();
    for(int i=1; i<=N; i++) A[i]=_C[i-1];
    for(int i=1; i<=Q; i++) B[i]={_L[i-1]+1, _R[i-1]+1, _V[i-1]};

    for(int i=1; i<=Q; i++)
    {
        int l=B[i].l, r=B[i].r, v=B[i].v;
        if(l/SQ==r/SQ)
        {
            BB[l/SQ].push_back({l, r, v});
        }
        else
        {
            BB[l/SQ].push_back({l, min(N, l/SQ*SQ+SQ-1), v});
            BB[r/SQ].push_back({max(1, r/SQ*SQ), r, v});
            for(int j=l/SQ+1; j<r/SQ; j++)
            {
                BB[j].push_back({0, 0, v});
            }
        }
    }
    //printf("HIHI\n");

    for(int i=0; i<=N/SQ; i++)
    {
        int l=max(1, i*SQ), r=min(N, i*SQ+SQ-1);

        vector<pii> V2;
        for(int i=l; i<=r; i++) V2.push_back({A[i], i});
        sort(V2.begin(), V2.end());
        int pt=0;
        vector<Query> V;
        while(pt<BB[i].size())
        {
            for(; pt<BB[i].size() && BB[i][pt].l==0; pt++) V.push_back(BB[i][pt]);
            calc(l, r, V, V2);
            V.clear();
            if(pt<BB[i].size())
            {
                for(int j=BB[i][pt].l; j<=BB[i][pt].r; j++)
                {
                    ans[j]+=BB[i][pt].v;
                    ans[j]=max(ans[j], 0);
                    ans[j]=min(ans[j], A[j]);
                }
                pt++;
            }
        }

    }

    return vector<int>(ans+1, ans+N+1);
}

Compilation message

candies.cpp: In function 'void calc(int, int, std::vector<Query>, std::vector<std::pair<int, int> >)':
candies.cpp:85:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   85 |         for(; pt<V2.size() && V2[pt].first<=x2; pt++)
      |               ~~^~~~~~~~~~
candies.cpp:95:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   95 |     for(; pt<V2.size(); pt++)
      |           ~~^~~~~~~~~~
candies.cpp:152:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  152 |         for(; pt<V2.size() && V2[pt].first<=x2; pt++)
      |               ~~^~~~~~~~~~
candies.cpp:161:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  161 |     for(; pt<V2.size(); pt++)
      |           ~~^~~~~~~~~~
candies.cpp: In function 'std::vector<int> distribute_candies(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
candies.cpp:222:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Query>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  222 |         while(pt<BB[i].size())
      |               ~~^~~~~~~~~~~~~
candies.cpp:224:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Query>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  224 |             for(; pt<BB[i].size() && BB[i][pt].l==0; pt++) V.push_back(BB[i][pt]);
      |                   ~~^~~~~~~~~~~~~
candies.cpp:227:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Query>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  227 |             if(pt<BB[i].size())
      |                ~~^~~~~~~~~~~~~

Subtask #1
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 4 ms 5068 KB Output is correct
4 Correct 6 ms 5068 KB Output is correct
5 Correct 17 ms 5268 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2703 ms 570452 KB Output is correct
2 Correct 2754 ms 567300 KB Output is correct
3 Correct 2702 ms 566300 KB Output is correct

Subtask #3
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5004 KB Output is correct
2 Correct 1166 ms 22076 KB Output is correct
3 Correct 103 ms 20152 KB Output is correct
4 Correct 3696 ms 569936 KB Output is correct
5 Correct 3729 ms 567176 KB Output is correct
6 Correct 3757 ms 569576 KB Output is correct
7 Correct 3139 ms 568276 KB Output is correct

Subtask #4
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5068 KB Output is correct
2 Correct 4 ms 4940 KB Output is correct
3 Correct 1269 ms 35484 KB Output is correct
4 Correct 150 ms 28088 KB Output is correct
5 Execution timed out 5182 ms 1603696 KB Time limit exceeded
6 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 4 ms 5068 KB Output is correct
4 Correct 6 ms 5068 KB Output is correct
5 Correct 17 ms 5268 KB Output is correct
6 Correct 2703 ms 570452 KB Output is correct
7 Correct 2754 ms 567300 KB Output is correct
8 Correct 2702 ms 566300 KB Output is correct
9 Correct 4 ms 5004 KB Output is correct
10 Correct 1166 ms 22076 KB Output is correct
11 Correct 103 ms 20152 KB Output is correct
12 Correct 3696 ms 569936 KB Output is correct
13 Correct 3729 ms 567176 KB Output is correct
14 Correct 3757 ms 569576 KB Output is correct
15 Correct 3139 ms 568276 KB Output is correct
16 Correct 4 ms 5068 KB Output is correct
17 Correct 4 ms 4940 KB Output is correct
18 Correct 1269 ms 35484 KB Output is correct
19 Correct 150 ms 28088 KB Output is correct
20 Execution timed out 5182 ms 1603696 KB Time limit exceeded
21 Halted 0 ms 0 KB -