#include <iostream>
#include <bits/stdc++.h>
using namespace std;
#define debug(a) cout << #a << " = " << a << endl
#define debugsl(a) cout << #a << " = " << a << ", "
#define rep(i,a,b) for(int i = (a); i <= (b); i++)
#define repa(i,a,b) for(int i = (a); i >= (b); i--)
#define lli long long int
#define pll pair<lli,lli>
#define MAX 100000
// para los hijos
#define des first
#define w second
//para el arreglo de lin
#define prep first
#define vel second
//para el convex hull
#define m first
#define ord second
lli n,a,b,c;
vector<pll> hijos[MAX+2];
pll lin[MAX+2],ch[MAX+2];
long double anterior[MAX+2];
lli ancestros[MAX+2][20];
lli dp[MAX+2],prof[MAX+2],rp[MAX+2];
long double cruce(pll a, pll b) {
long double u = a.ord - b.ord;
long double v = b.m - a.m;
u /= v;
return u;
}
void solve(lli pos, lli padre, lli p) {
prof[pos] = p;
// responde la pregunta para mi posicion
lli x = padre;
repa(i,18,0) if (anterior[ancestros[x][i]] > (long double)lin[pos].vel) x = ancestros[x][i];
if (anterior[x] > (long double)lin[pos].vel) x = ancestros[x][0];
dp[pos] = lin[pos].prep + prof[pos]*lin[pos].vel + dp[x] - prof[x]*lin[pos].vel;
//hago mi propia línea
ch[pos].ord = dp[pos];
ch[pos].m = -prof[pos];
//me integro en el convex hull trick
x = padre;
while (x != 0) if (cruce(ch[pos], ch[x]) < anterior[x]) x = ancestros[x][0];
else break;
ancestros[pos][0] = x;
anterior[pos] = cruce(ch[pos], ch[x]);
rep(i,1,18) {
ancestros[pos][i] = ancestros[x][i-1];
x = ancestros[pos][i];
}
for(auto h : hijos[pos]) {
if (h.des == rp[pos]) continue;
rp[h.des] = pos;
solve(h.des,pos,p+h.w);
}
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cin >> n;
rep(i,2,n) {
cin >> a >> b >> c;
hijos[a].push_back({b,c});
hijos[b].push_back({a,c});
}
rep(i,2,n) cin >> lin[i].prep >> lin[i].vel;
for (auto h : hijos[1]) {
rp[h.des] = 1;
solve(h.des,0,h.w);
}
rep(i,2,n) cout << dp[i] << ' ';
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
2684 KB |
Output is correct |
2 |
Correct |
4 ms |
3668 KB |
Output is correct |
3 |
Correct |
58 ms |
17020 KB |
Output is correct |
4 |
Correct |
83 ms |
24012 KB |
Output is correct |
5 |
Correct |
101 ms |
30924 KB |
Output is correct |
6 |
Runtime error |
139 ms |
37868 KB |
Memory limit exceeded |
7 |
Correct |
79 ms |
24388 KB |
Output is correct |
8 |
Execution timed out |
1070 ms |
33120 KB |
Time limit exceeded |
9 |
Execution timed out |
1060 ms |
31776 KB |
Time limit exceeded |
10 |
Execution timed out |
1050 ms |
33376 KB |
Time limit exceeded |