# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
942037 | KG07 | Aliens (IOI16_aliens) | C++14 | 4 ms | 348 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include "aliens.h"
#include <bits/stdc++.h>
using namespace std;
long long take_photos(int n, int m, int k, vector<int> r, vector<int> c) {
priority_queue<pair<int, int>> q;
for(int i = 0; i < n; i++){
if(r[i] > c[i])q.push(make_pair(-c[i], r[i]));
else q.push(make_pair(-r[i], c[i]));
}
vector<pair<int, int>> a;
a.push_back(make_pair(-q.top().first, q.top().second));
q.pop();
while(!q.empty()){
if(-q.top().first > a[a.size()-1].first && q.top().second > a[a.size()-1].second)a.push_back(make_pair(-q.top().first, q.top().second));
q.pop();
}
long long L = 0LL, R = 1LL * m * m;
while(true){
long long C = (L+R)/2;
vector<long long> b, d, x, y, z;
stack<long long> s;
b.push_back(0LL);
d.push_back(0LL);
x.push_back(0LL);
y.push_back(-2LL*(a[0].first-1));
z.push_back(1LL*(a[0].first-1)*(a[0].first-1));
//cout << b[0] << " " << x[0]-C << " " << y[0] << " " << z[0] << "\n";
//cout << L << " " << C << " " << R << "\n";
for(int i = 0; i < a.size(); i++){
b.push_back(1000000LL*m*m);
d.push_back(0LL);
x.push_back(C+1LL*a[i].second*a[i].second);
y.push_back(-2LL*(a[i+1].first-1));
z.push_back(1LL*(a[i+1].first-1)*(a[i+1].first-1)-max(0LL, 1LL*(a[i].second-a[i+1].first+1))*max(0LL, 1LL*(a[i].second-a[i+1].first+1)));
for(int j = 0; j <= i; j++){
if(b[j]+x[i+1]+y[j]*a[i].second+z[j] <= b[i+1])d[i+1] = d[j]+1;
b[i+1] = min(b[i+1], b[j]+x[i+1]+y[j]*a[i].second+z[j]);
}
//cout << b[i+1] << " " << x[i+1] << " " << y[i+1] << " " << z[i+1] << " " << d[i+1] << "\n";
}
if(L == R)return b[a.size()]-C*d[a.size()];
if(d[a.size()] > k)L = (L+R+1)/2;
else R = C;
}
return 0;
}
Compilation message (stderr)
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
Fetching results... |