Submission #1243897

#	Time	Username	Problem	Language	Result	Execution time	Memory
1243897		somefolk	Distributing Candies (IOI21_candies)	C++20	11 / 100	5093 ms	9032 KiB

candies

#include <iostream>
#include <cmath>
#include <algorithm>
#include <string>
#include <vector>
#include <map>
#include <unordered_map>
#include <queue>
#include <set>
#include <unordered_set>
#include <complex>
#include <list>
#include <cassert>
#include <chrono>
#include <random>
#include <stack>
#include <iomanip>
#include <fstream>
using namespace std;

#define endl "\n"
// #define int long long

const int INF = 1e9+7;
const int MOD = 1e9+7;

struct Query {
    int idx, val;
};

vector<int> distribute_candies(vector<int> a, vector<int> l, vector<int> r, vector<int> v){
    int n = (int)a.size(), q = (int)l.size();

    int subtask2 = 1;
    for(int i = 0; i < q; i++){
        if(v[i] < 0){
            subtask2 = 0;
        }
    }

    int subtask3 = 1;
    for(int i = 1; i < n; i++){
        if(a[i] != a[i-1]){
            subtask3 = 0;
        }
    }

    vector<long long> sol(n, 0);
    if(subtask3){
        vector<Query> qry;
        for(int i = 0; i < q; i++){
            qry.push_back({l[i], v[i]});
            qry.push_back({r[i]+1, -v[i]});
        }

        sort(qry.begin(), qry.end(), [&](auto left, auto right){
            return left.idx < right.idx;
        });

        // for(auto &i : qry) cout << i.idx << " " << i.val << " | ";
        // cout << endl;

        int curr = 0, j = 0;
        for(int i = 0; i < n; i++){
            while(j < n && i == qry[j].idx){
                curr += qry[j].val;
                if(curr > a[i]) curr = a[i];
                if(curr < 0) curr = 0;
                j++;
                // cout << i << " " << curr << " " << qry[j].idx << " " << qry[j].val << endl;
            }
            sol[i] = curr;
        }
    } else if(subtask2){
        for(int i = 0; i < q; i++){
            sol[l[i]] += v[i];
            if(r[i] < n-1){
                sol[r[i]+1] -= v[i];
            }
        }

        for(int i = 1; i < n; i++){
            sol[i] += sol[i-1];
        }
    } else {
        for(int i = 0; i < q; i++){
            for(int j = l[i]; j <= r[i]; j++){
                if(sol[j] >= -v[i] && sol[j] <= a[j]-v[i]){
                    sol[j] += v[i];
                } else {
                    sol[j] = (v[i]>0 ? a[j] : 0);
                }
            }
        }
    }

    vector<int> sol2(n, 0);
    for(int i = 0; i < n; i++){
        if(sol[i] > a[i]){
            sol2[i] = a[i];
        } else {
            sol2[i] = sol[i];
        }
    }
    
    // for(auto &i : sol2){
    //     cout << i << " ";
    // }

    return sol2;
}

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