Submission #1026591

#	Time	Username	Problem	Language	Result	Execution time	Memory
1026591		Issa	Jobs (BOI24_jobs)	C++17	0 / 100	2013 ms	23960 KiB

Main

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
#define ent "\n"

const int maxn = 3e5 + 100;
const ll INF = (ll)1e18 + 100;
const int inf = 1e9 + 100;
const int MOD = 1e9 + 7;
const int maxl = 350;
const int P = 31;

ll sum, start;
int n;
vector<int> g[maxn];
int p[maxn];
int a[maxn];
ll mn[maxn];
ll sm[maxn];
int used[maxn];

void test(){
	cin >> n >> start; sum = start;
	for(int i = 1; i <= n; i++){
		cin >> a[i] >> p[i];
		g[p[i]].push_back(i);
	}
	used[0] = 1;
	while(true){
		for(int i = 1; i <= n; i++){
			sm[i] = mn[i] = 0;
		}
		ll nxt = sum, f;
		for(int v = 1; v <= n; v++){
			if(used[v]) continue;
			sm[v] += a[v];
			mn[v] = min(mn[v], sm[v]);
			for(int to: g[v]){
				sm[to] = sm[v];
				mn[to] = mn[v];
			}
			if(sum + mn[v] >= 0){
				nxt = max(nxt, sum + sm[v]);
				f = v;
			}
		}
		if(nxt > sum){
			sum = nxt;
			while(!used[f]){
				used[f] = 1;
				f = p[f];
			}
		} else break;
	}
	cout << sum - start;
}

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    int t; t = 1;
    while(t--) test();
    cout << ent;
}

Compilation message (stderr)

Main.cpp: In function 'void test()':
Main.cpp:51:17: warning: 'f' may be used uninitialized in this function [-Wmaybe-uninitialized]
   51 |    while(!used[f]){
      |           ~~~~~~^

• Subtask 1: 0 / 11
• Subtask 2: 0 / 14
• Subtask 3: 0 / 15
• Subtask 4: 0 / 29
• Subtask 5: 0 / 31