| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 1302233 | souvenir_vayne | Aliens (IOI16_aliens) | C++20 | 0 ms | 0 KiB |
#include <bits/stdc++.h>
#include "aliens.h"
#define pb push_back
#define F0R(var) for (; (var) > 0; --(var))
#define endl '\n'
template<typename... Ts>
void debug_out(const Ts&... ts) {
std::cerr << "DEBUG:";
if constexpr (sizeof...(Ts) > 0) {
((std::cerr << ' ' << ts), ...);
}
std::cerr << '\n';
}
#define f first
#define FINOUT cin.tie(0), cout.tie(0), ios::sync_with_stdio(0)
#define s second
#define debug(...) debug_out(__VA_ARGS__)
#define all(x) x.begin(), x.end()
using namespace std;
typedef pair<long long, long long> pii;
typedef vector<long long> vi;
long long take_photos(int n, int m, int k, std::vector<int> r, std::vector<int> c) {
vector<long long> minL(m + 1);
iota(all(minL), 1);
for(long long i = 0; i < n; i++) {
if(r[i] < c[i])
swap(r[i], c[i]);
r[i]++, c[i]++;
minL[r[i]] = min(minL[r[i]], c[i]);
}
long long ini = 0, mid, end = 1e13, ans;
while(ini <= end) {
mid = (ini + end) / 2;
vector<pii> dp(m + 1, {1e13, 1});
dp[0] = {0, 0};
for(long long i = 1; i <= m; i++) {
if(minL[i] == i + 1)
dp[i] = dp[i - 1];
for(long long j = min(i, minL[i]); j >= 1; j--) {
j = min(j, minL[j]);
dp[i] = min(dp[i], {dp[j - 1].f + mid + (i - j + 1) * (i - j + 1), dp[j - 1].s + 1});
}
}
if(dp[m].s <= k) {
ans = dp[m].f - k * mid;
end = mid - 1;
}
else ini = mid + 1;
}
return ans;
}