Submission #998121

#	Time	Username	Problem	Language	Result	Execution time	Memory
998121		salmon	Jobs (BOI24_jobs)	C++14	100 / 100	288 ms	96708 KiB

Main

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

#define set multiset

int N;
vector<int> root;
int h,h1;
vector<int> adjlst[300100];
long long int lst[300100];
int parent[300100];
const long long int inf = 2e18;
long long int money;
priority_queue<pair<long long int,long long int>,vector<pair<long long int,long long int>>,greater<pair<long long int,long long int>>> pq;

set<pair<long long int,long long int>>* dfs(int i){
//printf("%d",i);
    pair<int,int> ii = {-1,-1};
    vector<set<pair<long long int,long long int>>*> v;

    for(int j : adjlst[i]){
        v.push_back(dfs(j));

        ii = max({(int)(v.back() -> size()),v.size() - 1},ii);
    }
//printf("%d\n",i);
    set<pair<long long int,long long int>>* sat;

    if(ii.first == -1){
        sat = new set<pair<long long int,long long int>>();
    }
    else{
        sat = v[ii.second];
    }

    if(lst[i] > 0) sat -> insert({0,lst[i]});


    for(int i = 0; i < v.size(); i++){
        if(i == ii.second) continue;
        for(pair<long long int, long long int> pp : *(v[i]) ){
            sat -> insert(pp);
        }
    }

    //offset -= min(0LL,va);
    long long int num = 0;

    if(lst[i] < 0){
        long long int balls = -lst[i];

        num = -lst[i];
        while(num != 0 && !(sat -> empty())){
            auto it = sat -> begin();
            long long int temp = min(num, it -> second);
            balls = max((sat -> begin() -> first) + num, balls);
            num -= temp;
            if(it -> second == temp){
                sat -> erase(it);
            }
            else{
                pair<long long int, long long int> ii = *it;
                ii.second = ii.second - temp ;
                sat -> erase(it);
                sat -> insert(ii);
            }
        }

        if(num != 0) return sat;

        while(sat -> lower_bound({balls,inf}) != sat -> begin()){
            auto it = sat -> lower_bound({balls,inf});
            advance(it,-1);
            num += it -> second;
            sat -> erase(it);
        }

        if(num != 0) sat -> insert({balls, num});

        return sat;
    }
    else{
        return sat;
    }
}

int main(){
    //freopen("jobs.17-2345.in","r",stdin);

	scanf(" %d",&N);
    scanf(" %lld",&money);

    long long int init = money;

	for(int i = 1; i <= N; i++){
		scanf(" %d",&h);
		scanf(" %d",&h1);

		if(h1 == 0){
			root.push_back(i);
		}
		else{
            adjlst[h1].push_back(i);
		}
		lst[i] = h;
	}
	//printf("\n");

	for(int i : root){
        set<pair<long long int,long long int>>* ii = dfs(i);

        for(pair<long long int, long long int> pp : *ii){
            //printf("%d %d\n",pp.first,pp.second);
            pq.push(pp);
        }
	}

	while(!pq.empty()){
        if(money < pq.top().first) break;
        money += pq.top().second;
        pq.pop();
	}

	printf("%lld",money - init);
}
/*
5 104
-103 0
102 1
-103 2
55 3
50 3

1 0
-5 0

*/

Compilation message (stderr)

Main.cpp: In function 'std::multiset<std::pair<long long int, long long int> >* dfs(int)':
Main.cpp:39:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::multiset<std::pair<long long int, long long int> >*>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |     for(int i = 0; i < v.size(); i++){
      |                    ~~^~~~~~~~~~
Main.cpp: In function 'int main()':
Main.cpp:90:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   90 |  scanf(" %d",&N);
      |  ~~~~~^~~~~~~~~~
Main.cpp:91:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   91 |     scanf(" %lld",&money);
      |     ~~~~~^~~~~~~~~~~~~~~~
Main.cpp:96:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   96 |   scanf(" %d",&h);
      |   ~~~~~^~~~~~~~~~
Main.cpp:97:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   97 |   scanf(" %d",&h1);
      |   ~~~~~^~~~~~~~~~~

• Subtask 1: 11 / 11
• Subtask 2: 14 / 14
• Subtask 3: 15 / 15
• Subtask 4: 29 / 29
• Subtask 5: 31 / 31