#include<bits/stdc++.h>
using namespace std;
typedef long long llint;
typedef pair <llint, llint> pi;
const int MAXN = 2805;
const int MAXQ = 3000005;
int n, q;
int cost[MAXN];
pi pa[MAXN], pb[MAXN];
int upp[MAXN*3][MAXN*3], rig[MAXN*3][MAXN*3];
llint dp[MAXN*3][MAXN*3];
llint qx[MAXQ], qy[MAXQ], sol[MAXQ];
vector <llint> vx, vy;
vector <pi> ux[MAXN*3], uy[MAXN*3];
deque <pi> hull;
void precompute () {
for (int i = 1; i <= n; i++) {
vx.push_back(pa[i].first); vy.push_back(pa[i].second);
vx.push_back(pb[i].first); vy.push_back(pb[i].second);
}
sort(vx.begin(), vx.end());
vx.erase(unique(vx.begin(), vx.end()), vx.end());
sort(vy.begin(), vy.end());
vy.erase(unique(vy.begin(), vy.end()), vy.end());
for (int i = 1; i <= n; i++) {
int ix = lower_bound(vx.begin(), vx.end(), pa[i].first) - vx.begin();
int iy = lower_bound(vy.begin(), vy.end(), pa[i].second) - vy.begin();
int jx = lower_bound(vx.begin(), vx.end(), pb[i].first) - vx.begin();
int jy = lower_bound(vy.begin(), vy.end(), pb[i].second) - vy.begin();
if (iy == jy) {
for (int k = ix; k < jx; k++) {
rig[k][iy] = max(rig[k][iy], cost[i]);
}
} else {
for (int k = iy; k < jy; k++) {
upp[ix][k] = max(upp[ix][k], cost[i]);
}
}
}
for (int i = (int)vx.size() - 1; i >= 0; i--) {
for (int j = (int) vy.size() - 1; j >= 0; j--) {
llint res = 0;
if (i + 1 < vx.size()) res = max(res, dp[i + 1][j] + rig[i][j] * (vx[i + 1] - vx[i]));
if (j + 1 < vy.size()) res = max(res, dp[i][j + 1] + upp[i][j] * (vy[j + 1] - vy[j]));
dp[i][j] = res;
}
}
}
void obradi (int ind) {
llint x = qx[ind], y = qy[ind];
int i = lower_bound(vx.begin(), vx.end(), x) - vx.begin();
int j = lower_bound(vy.begin(), vy.end(), y) - vy.begin();
sol[ind] = dp[i][j];
if (i - 1 >= 0 && i < vx.size() && x != vx[i]) ux[i].push_back({y, ind});
if (j - 1 >= 0 && j < vy.size() && y != vy[j]) uy[j].push_back({x, ind});
}
llint ccw (pi a, pi b, pi c) {
return a.first * (b.second - c.second) + b.first * (c.second - a.second) + c.first * (a.second - b.second);
}
llint f (pi pt, llint val) {
return pt.first * val + pt.second;
}
void ubaci (pi pt) {
while (hull.size() >= 1 && pt.first >= hull[0].first) hull.pop_front();
while (hull.size() >= 2 && ccw(pt, hull[0], hull[1]) <= 0) hull.pop_front();
hull.push_back(pt);
}
llint upit (llint val) {
if (hull.empty()) return 0;
int lo = 0, hi = hull.size() - 1;
while (lo < hi) {
int mid = (lo + hi) / 2;
if (f(hull[mid], val) >= f(hull[mid + 1], val)) {
hi = mid;
} else {
lo = mid + 1;
}
}
return f(hull[lo], val);
}
void calc_x (int pos) {
hull.clear();
int p = (int)vy.size() - 1;
sort(ux[pos].begin(), ux[pos].end());
for (int i = (int)ux[pos].size() - 1; i >= 0; i--) {
int ind = ux[pos][i].second;
llint val = vx[pos] - qx[ind];
while (p >= 0 && vy[p] >= qy[ind]) {
ubaci({rig[pos - 1][p], dp[pos][p]});
p--;
}
sol[ind] = max(sol[ind], upit(val));
}
}
void calc_y (int pos) {
hull.clear();
int p = (int)vx.size() - 1;
sort(uy[pos].begin(), uy[pos].end());
for (int i = (int)uy[pos].size() - 1; i >= 0; i--) {
int ind = uy[pos][i].second;
llint val = vy[pos] - qy[ind];
while (p >= 0 && vx[p] >= qx[ind]) {
ubaci({upp[p][pos - 1], dp[p][pos]});
p--;
}
sol[ind] = max(sol[ind], upit(val));
}
}
int main () {
ios_base::sync_with_stdio(false);
cin.tie(0);
cin >> n >> q;
for (int i = 1; i <= n; i++) {
int t, a, b;
cin >> t >> a >> b >> cost[i];
cost[i] /= 2;
llint x = t, y = a;
pa[i] = {x - y, x + y};
x = t + abs(a - b), y = b;
pb[i] = {x - y, x + y};
//cout << "bla " << pa[i].first << " " << pa[i].second << " " << pb[i].first << " " << pb[i].second << " " << cost[i] << endl;
}
precompute();
for (int i = 1; i <= q; i++) {
int x, y;
cin >> x >> y;
qx[i] = x - y; qy[i] = x + y;
obradi(i);
}
for (int i = (int)vx.size() - 1; i >= 1; i--) calc_x(i);
for (int i = (int)vy.size() - 1; i >= 1; i--) calc_y(i);
for (int i = 1; i <= q; i++) {
cout << sol[i] << '\n';
}
return 0;
}
Compilation message
bodyguard.cpp: In function 'void precompute()':
bodyguard.cpp:50:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
50 | if (i + 1 < vx.size()) res = max(res, dp[i + 1][j] + rig[i][j] * (vx[i + 1] - vx[i]));
| ~~~~~~^~~~~~~~~~~
bodyguard.cpp:51:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
51 | if (j + 1 < vy.size()) res = max(res, dp[i][j + 1] + upp[i][j] * (vy[j + 1] - vy[j]));
| ~~~~~~^~~~~~~~~~~
bodyguard.cpp: In function 'void obradi(int)':
bodyguard.cpp:62:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
62 | if (i - 1 >= 0 && i < vx.size() && x != vx[i]) ux[i].push_back({y, ind});
| ~~^~~~~~~~~~~
bodyguard.cpp:63:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
63 | if (j - 1 >= 0 && j < vy.size() && y != vy[j]) uy[j].push_back({x, ind});
| ~~^~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2897 ms |
295504 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
282 ms |
240800 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
282 ms |
240800 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
282 ms |
240800 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2897 ms |
295504 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
