#include<bits/stdc++.h>
#define f first
#define s second
#define ll long long
using namespace std;
const int N=2e6+5,mod=1e9+7;
int t,a[N],b[N],n;
pair<ll,ll>tree[4*N];
ll f(ll k,ll x,ll b){
return k*x+b;
}
void insert(int u,int l,int r,ll k,ll b) {
if(l==r) {
if(f(tree[u].f,l,tree[u].s) > f(k,l,b)) {
tree[u] = {k,b};
}
return;
}
int mid = (l+r)/2;
if(k < tree[u].f) {
swap(k,tree[u].f);
swap(b,tree[u].s);
}
if(f(k,mid,b) >= f(tree[u].f,mid,tree[u].s)) {
insert(2*u,l,mid,k,b);
}
else {
insert(2*u+1,mid+1,r,tree[u].f,tree[u].s);
tree[u] = {k,b};
}
}
ll getans(int u,int ind,int l,int r) {
if(l==r) {
return f(tree[u].f,ind,tree[u].s);
}
int mid = (l+r)/2;
if(ind <= mid) return min(f(tree[u].f,ind,tree[u].s),getans(2*u,ind,l,mid));
return min(f(tree[u].f,ind,tree[u].s),getans(2*u+1,ind,mid+1,r));
}
void build(int u,int l,int r) {
tree[u] = {1e7,1e17};
if(l==r) return;
int mid = (l+r)/2;
build(2*u,l,mid);
build(2*u+1,mid+1,r);
}
main(){
cin>>n;
int mx = 0;
for(int i=1;i<=n;i++){
cin>>a[i];
mx = max(mx,a[i]);
}
mx *= 2;
for(int i=1;i<=n;i++){
cin>>b[i];
b[i] += b[i-1];
}
build(1,1,mx);
insert(1,1,mx,2*a[1],-b[1]+a[1]*a[1]);
for(int i=2;i<=n;i++) {
ll ans = getans(1,-a[i],1,mx) + a[i]*a[i] + b[i-1];
insert(1,1,mx,2*a[i],ans-b[i]+a[i]*a[i]);
if(i==n) cout<<ans;
}
}
Compilation message
building.cpp:47:2: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
47 | main(){
| ^~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
332 KB |
Output is correct |
| 2 |
Incorrect |
1 ms |
716 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
101 ms |
9280 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
332 KB |
Output is correct |
| 2 |
Incorrect |
1 ms |
716 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
