#include <bits/stdc++.h>
#define inf 2000000000000000000LL
#define N 100005
#define f first
#define s second
using namespace std;
typedef long long ll;
typedef pair<ll, ll> pii;
ll n, m, k;
pii ini[N], v[N];
vector<pii> aux;
int r;
vector<pair<pii, int> > f;
pii F(ll x, ll id)
{
return {f[id].f.f*x + f[id].f.s, f[id].s};
}
bool bad(pii C, pii B, pii A)
{
return (B.s - A.s)*(A.f - C.f) < (C.s - A.s)*(A.f - B.f);
}
void addline(pair<pii, int> l)
{
ll p = f.size();
if(p < 2) f.push_back(l);
else
{
while(p >= 2 && bad(f[p - 2].f, f[p - 1].f, l.f))
{
p--;
f.pop_back();
}
f.push_back(l);
}
}
pii query(ll x)
{
ll p = f.size();
if(r >= p) r = p - 1;
while(r < p - 1 && F(x, r) > F(x, r + 1)) r++;
return F(x, r);
}
bool cmp(pii esq, pii dir)
{
if(esq.f != dir.f) return esq.f < dir.f;
return esq.s > dir.s;
}
pii dp[N];
pii solve(ll cost)
{
for(int i = 1; i <= n; i++)
{
ll dc = 0;
if(i > 1) dc = max(0LL, (v[i - 1].s - v[i].f + 1));
dc = dc*dc;
pii reta = {-2*v[i].f, dp[i - 1].f + v[i].f*v[i].f - 2*v[i].f - dc};
addline({ reta, dp[i - 1].s });
ll cte = v[i].s*v[i].s + 2*v[i].s + 1, X = v[i].s;
dp[i] = query(X);
dp[i].f += cost + cte, dp[i].s ++;
}
f.clear();
return dp[n];
}
int main()
{
cin>>n>>m>>k;
for(int i = 1, x, y; i <= n; i++)
{
cin>>x>>y;
ini[i] = {min(x, y), max(x, y)};
}
sort(ini + 1, ini + n + 1, cmp);
for(int i = 1; i <= n; i++)
{
pii st = ini[i];
aux.push_back(st);
while(i <= n && (ini[i].s <= st.s)) i++;
i --;
}
n = aux.size();
for(int i = 1; i <= n; i++) v[i] = aux[i - 1];
for(int i = 1; i <= n; i++)
{
dp[i] = { (v[i].s - v[1].f + 1)*(v[i].s - v[1].f + 1), 1 };
}
k = min(k, n);
ll ini = 0, fim = (ll)5000000000000, mid;
for(int cnt = 0; cnt < 50; cnt ++)
{
mid = (ini + fim)/2;
pii p = solve(mid);
if(p.s > k) ini = mid;
else if(p.s < k)fim = mid + 1;
}
solve(mid);
cout<<dp[n].f - mid*k<<"\n";
}
Compilation message
/tmp/ccQGSXkV.o: In function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'
/tmp/ccOvMJXX.o:aliens.cpp:(.text.startup+0x0): first defined here
/tmp/ccQGSXkV.o: In function `main':
grader.cpp:(.text.startup+0xdf): undefined reference to `take_photos(int, int, int, std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status
