#include <bits/stdc++.h>
#define fo(i, d, c) for (int i = d; i <= c; i++)
#define fod(i, c, d) for (int i = c; i >= d; i--)
#define maxn 1000010
#define N 1010
#define fi first
#define se second
#define pb emplace_back
#define en cout << "\n";
#define inf 1000000000
#define pii pair<int, int>
#define vii vector<pii>
#define lb(x) x & -x
#define bit(i, j) ((i >> j) & 1)
#define offbit(i, j) (i ^ (1 << j))
#define onbit(i, j) (i | (1 << j))
#define vi vector<int>
using namespace std;
using ll = long long;
const ll INFL = ll(1e18) + 1008;
const int nax = int(1e6);
struct line {
ll m, b;
line() { m = 0, b = INFL; }
line(ll m, ll b) : m(m), b(b) { }
ll get(ll x) { return m * x + b; }
};
struct LiChao {
struct node {
node *l, *r;
line x;
node(line x) : x(x) { l = r = 0; }
};
node *t = new node(line());
void upd(line x, node *&v, int l = 0, int r = nax) {
if (!v) { v = new node(x); return; }
int m = (l + r) / 2;
bool lf = x.get(l) < v->x.get(l);
bool md = x.get(m) < v->x.get(m);
if (md) swap(x, v->x);
if (l == r) return;
if (lf != md) upd(x, v->l, l, m);
else upd(x, v->r, m+1, r);
}
ll get(int x, node *&v, int l = 0, int r = nax) {
if (!v) return INFL;
int m = (l + r) / 2;
if (l == r) return v->x.get(x);
if (x < m) return min(v->x.get(x), get(x, v->l, l, m));
else return min(v->x.get(x), get(x, v->r, m+1, r));
}
void add(line x) { return upd(x, t); }
ll get(int x) { return get(x, t); }
}cht;
int n;
int h[maxn];
int w[maxn];
int pre[maxn];
int dp[maxn];
main()
{
#define name "TASK"
if (fopen(name ".inp", "r"))
{
freopen(name ".inp", "r", stdin);
freopen(name ".out", "w", stdout);
}
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cin >> n;
fo(i, 1, n) cin >> h[i];
fo(i, 1, n)
{
cin >> w[i];
pre[i] = pre[i - 1] + w[i];
}
cht.add({-2 * h[1], h[1] * h[1] + w[1]});
fo(i, 2, n)
{
dp[i] = cht.get(h[i]) + pre[i - 1] + h[i] * h[i];
cht.add({-2 * h[i],h[i] * h[i] - pre[i] + dp[i]});
}
cout << dp[n];
}
Compilation message
building.cpp:67:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
67 | main()
| ^~~~
building.cpp: In function 'int main()':
building.cpp:72:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
72 | freopen(name ".inp", "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
building.cpp:73:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
73 | freopen(name ".out", "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
4440 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
24 ms |
9052 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
4440 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
