제출 #1051659

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1051659		mindiyak	Jobs (BOI24_jobs)	C++14	0 / 100	748 ms	1048576 KiB

Main

#pragma GCC optimize("O1,O2,O3,Ofast,unroll-loops")
#include <bits/stdc++.h>
#include <string>
#include <iostream>
#include <cmath>
#include <numeric>
#include <stack>
#include <queue>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<int, int> pi;
typedef pair<ll, ll> pl;
typedef pair<ld, ld> pd;
typedef vector<int> vi;
typedef vector<bool> vb;
typedef vector<vector<int>> vvi;
typedef vector<vector<pi>> vvpi;
typedef vector<ld> vd;
typedef vector<long long> vl;
typedef vector<pi> vpi;
typedef vector<pl> vpl;
#define FOR(i, a, b) for (ll i = a; i < (b); i++)
#define F0R(i, a) for (int i = 0; i < (a); i++)
#define FORd(i, a, b) for (int i = (b)-1; i >= a; i--)
#define F0Rd(i, a) for (int i = (a)-1; i >= 0; i--)
#define trav(a, x) for (auto &a : x)
#define uid(a, b) uniform_int_distribution<int>(a, b)(rng)
#define len(x) (int)(x).size()
#define mp make_pair
#define pb push_back
#define F first
#define nl endl
#define S second
#define lb lower_bound
#define ub upper_bound
#define aint(x) x.begin(), x.end()
#define raint(x) x.rbegin(), x.rend()
#define ins insert
const int MOD = 1e9+7;
void init(string name)
{
    freopen((name + ".in").c_str(), "r", stdin);
    freopen((name + ".out").c_str(), "w", stdout);
}
void fastIO()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
}
 
int N = 3e5+20;
vector<set<int>> sons(N, set<int>());
queue<int> roots;
vi poces(N,0);
vi profit(N,0);
 
ll ans = 0;
int used = 0;
 
void proc(int pos,ll money,set<int> pathset){
    if(used)return;

    money += profit[pos];

    pathset.insert(pos);
 
    // cout << pos << " " << money << " " << ans << endl;
    if(money > ans){
        ans = money;
        for(int b:pathset){
            // cout << b << " -> ";
            for(int a:sons[b]){
                if(pathset.count(a) == 0 && poces[a] == 0){
                    // cout << a << " ";
                    roots.push(a);
                    poces[a] = 1;
                }
            }
            // cout << endl;
            // sons[b].clear();
        }
        // cout << "ans - " << ans  << " " << roots.size()<< endl;
        used = 1;
        return;
    }

    // cout << "C" << endl;


    for(int a:sons[pos]){
        proc(a,money,pathset);
    }
}
 
 
void solve()
{
    int n;ll s;cin >> n >> s;
 
    FOR(i,0,n){
        int a,b;cin >> a >> b;
        b --;
        if(b == -1){
            poces[i] = 1;
            roots.push(i);
        }else{
            sons[b].insert(i);
        }
        profit[i] = a;
    }

    // FOR(i,0,n){
    //     cout << i << " -> ";
    //     for(int a:sons[i])cout << a << " ";
    //     cout << endl;
    // }

    while(!roots.empty()){
        used = 0;
        // cout << "B" << endl;
        int a = roots.front();roots.pop();
        set<int> pathset;vi path;
        proc(a,ans,pathset);
        // cout << "A" << endl;
    }
 
    cout << ans << endl;
 
}
 
 
int main()
{
    fastIO();
    // init("test");
    int t = 1;
    // cin >> t;
    while (t--)
        solve();
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

Main.cpp: In function 'void init(std::string)':
Main.cpp:44:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   44 |     freopen((name + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:45:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   45 |     freopen((name + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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