이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <bits/stdc++.h>
#define int long long
#define FOR(var,bound) for(int var = 0; var < bound; var++)
#define FORB(var,lb,ub) for (int var = lb; var < ub; var++)
#define FORR(var,bound) for(int var = bound-1; var >= 0; var--)
using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef vector<vector<int>> vvi;
typedef pair<int, int> pii;
vector<pii> ranges;
int rangeEnds[100000];
int N;
int dp[4005][4005];
int solve(int idx, int photosRemaining) {
if (idx == N) return 0;
if (photosRemaining == 0) return 1e15;
if (dp[idx][photosRemaining] != -1) return dp[idx][photosRemaining];
if (rangeEnds[idx] >= ranges[idx].second) return dp[idx][photosRemaining] = solve(idx+1, photosRemaining);
int penalty = rangeEnds[idx] < ranges[idx].first ? 0 : (rangeEnds[idx] - ranges[idx].first+1)*(rangeEnds[idx] - ranges[idx].first+1);
int res = 1e15;
int e = 0;
for (int i = idx; i < N; i++) {
e = max(e, ranges[i].second);
int s = (e - ranges[idx].first+1)*(e - ranges[idx].first+1) - penalty;
res = min(res, solve(i + 1, photosRemaining - 1) + s);
}
return dp[idx][photosRemaining] = res;
}
int64_t take_photos(int32_t n, int32_t m, int32_t k, vector<int32_t> r, vector<int32_t> c) {
N = n;
memset(dp, -1, sizeof(dp));
ranges.resize(n);
FOR(i, n) {
ranges[i] = {
min(r[i], c[i]),
max(r[i], c[i])
};
}
sort(ranges.begin(), ranges.end());
int e = -1;
FOR(i, n) {
rangeEnds[i] = e;
e = max(e, ranges[i].second);
}
return solve(0, k);
}
#ifdef LOCAL_TEST
signed main() {
ios_base::sync_with_stdio(false);
cin.tie(NULL);
int n, m, k;
cin >> n >> m >> k;
vector<int32_t> r(n), c(n);
FOR(i, n) {
cin >> r[i] >> c[i];
}
cout << take_photos(n, m, k, r, c) << endl;
}
#endif
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