Submission #595658

#	Time	Username	Problem	Language	Result	Execution time	Memory
595658		serize	Distributing Candies (IOI21_candies)	C++17	3 / 100	107 ms	17192 KiB

candies

#include "candies.h"
#include <bits/stdc++.h>
#include <cassert>
#include <cstdio>
#include <vector>
#define lowbit(x) x&(-x)

using namespace std;
const int MAX = 4e5+5;

vector<int> ar(MAX), state(MAX), abi(MAX);

inline void add(int k, int value){
    while(k < MAX){
        abi[k] += value;
        k += lowbit(k);
    }
}

inline int read(int k){
    int ans = 0;
    while(k > 0){
        ans += abi[k];
        k -= lowbit(k);
    }
    return ans;
} 


std::vector<int> distribute_candies(std::vector<int> c, std::vector<int> l, std::vector<int> r, std::vector<int> v){
    int n; n = c.size();
    bool subtask2 = 1;
    for(int i = 1; i <= n; i++){
        ar[i] = c[i-1];
    }
    for(auto i: v){
        if(i < 0) subtask2 = 0;
    }
    int q = l.size();
    if(q <= 2000){
        for(int i = 0; i < q; i++){
            for(int j = l[i]+1; j <= r[i]+1; j++ ){
                if(v[i] < 0) state[j] = max(0,state[j]+v[i]);
                else state[j] = min(ar[j],state[j]+v[i]);
            }
        }
    }
    else{
        if(subtask2){
           for(int i = 0; i < q; i++){
               add( l[i]+1, v[i] );
               add( r[i]+2, -v[i] );
           }
           for(int i = 1; i <= n; i++){
               state[i] = min( ar[i], read(i) );
           }
        }
    }
    vector<int> s;
    for(int i = 1; i <= n; i++){
        s.push_back(state[i]);
    }
    return s;
}

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