#include "meetings.h"
#include <bits/stdc++.h>
using namespace std;
#define INF 1000000000000000000
#define int long long
struct node {
int s, e, m, v;
node *l, *r;
node(int _s, int _e) {
s = _s, e = _e, m = (s+e)/2, v = 0;
if(s != e) {
l = new node(s, m);
r = new node(m+1, e);
}
}
void update(int x, int val) {
if(s == e) {v = val; return;}
else if(x > m) r->update(x, val);
else l->update(x, val);
v = l->v + r->v;
}
int rsum(int x, int y) {
if(x <= s && e <= y) return v;
else if(x > m) return r->rsum(x, y);
else if(y <= m) return l->rsum(x, y);
else return l->rsum(x, y) + r->rsum(x, y);
}
} *root[5000];
struct node2 {
int s, e, m, v;
node2 *l, *r;
node2(int _s, int _e) {
s = _s, e = _e, m = (s+e)/2, v = 0;
if(s != e) {
l = new node2(s, m);
r = new node2(m+1, e);
}
}
void update(int x, int val) {
if(s == e) {v = val; return;}
else if(x > m) r->update(x, val);
else l->update(x, val);
v = max(l->v, r->v);
}
int rmax(int x, int y) {
if(x <= s && e <= y) return v;
else if(x > m) return r->rmax(x, y);
else if(y <= m) return l->rmax(x, y);
else return max(l->rmax(x, y), r->rmax(x, y));
}
} *root2;
#undef int
std::vector<long long> minimum_costs(std::vector<int> H, std::vector<int> L, std::vector<int> R) {
#define int long long
int n = H.size(), q = L.size();
root2 = new node2(0, n-1);
for(int i = 0; i < n; i++) root2->update(i, H[i]);
for(int i = 0; i < n; i++) {
root[i] = new node(0, n-1);
for(int j = 0; j < n; j++) root[i]->update(j, root2->rmax(min(i,j), max(i,j)));
}
vector<int> ans(q);
for(int i = 0; i < q; i++) {
int tmp = INF;
for(int j = L[i]; j <= R[i]; j++) tmp = min(tmp, root[j]->rsum(L[i], R[i]));
ans[i] = tmp;
}
return ans;
#undef int
}
