이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <iostream>
#include <unordered_map>
#include <set>
using namespace std;
const int MAX_NOMBRE = 2042, INF = 1e9;
int nbPos, nbPetit, nbGrand;
multiset<int> pos;
unordered_map<int, int> idPos;
void input() {
cin >> nbPos >> nbPetit >> nbGrand;
nbPetit = min(nbPetit, nbPos);
nbGrand = min(nbGrand, nbPos);
for(int cur = 0; cur < nbPos; cur++) {
int posCur;
cin >> posCur;
pos.insert(posCur);
}
int idCur = 1;
for(auto cur : pos) {
idPos[cur] = idCur++;
}
}
int getPos(int posInit, int dist) {
auto it = pos.lower_bound(posInit - dist+1);
if(it == pos.begin()) {
return 0;
}
it--;
return idPos[*it];
}
int dp[MAX_NOMBRE][MAX_NOMBRE];
bool possible(int taille) {
for(int i = 0; i < MAX_NOMBRE; i++) {
for(int j = 0; j < MAX_NOMBRE; j++) {
dp[i][j] = INF;
}
}
dp[0][0] = 0;
int curPt = 1;
for(auto valPt : pos) {
for(int curPetit = 0; curPetit <= nbPetit; curPetit++) {
if(curPetit > 0) {
dp[curPt][curPetit] = min(dp[curPt][curPetit], dp[getPos(valPt, taille)][curPetit-1]);
}
dp[curPt][curPetit] = min(dp[curPt][curPetit], dp[getPos(valPt, taille*2)][curPetit] + 1);
if(curPt == nbPos && dp[curPt][curPetit] <= nbGrand) {
return 1;
}
}
curPt++;
}
return 0;
}
int dicho() {
int deb = 1, fin = INF;
while(deb < fin) {
int milieu = (deb + fin) / 2;
if(possible(milieu)) {
fin = milieu;
}
else {
deb = milieu+1;
}
}
return deb;
}
int main() {
ios::sync_with_stdio(false);
cin.tie(0);
input();
cout << dicho();
}
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