結果
| 問題 |
No.738 平らな農地
|
| コンテスト | |
| ユーザー |
tnakao0123
|
| 提出日時 | 2018-09-29 22:11:39 |
| 言語 | C++11(廃止可能性あり) (gcc 13.3.0) |
| 結果 |
AC
|
| 実行時間 | 95 ms / 2,000 ms |
| コード長 | 4,917 bytes |
| コンパイル時間 | 951 ms |
| コンパイル使用メモリ | 94,112 KB |
| 実行使用メモリ | 8,844 KB |
| 最終ジャッジ日時 | 2024-10-12 08:45:03 |
| 合計ジャッジ時間 | 6,918 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 5 |
| other | AC * 87 |
コンパイルメッセージ
main.cpp: In function ‘int main()’:
main.cpp:216:8: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
216 | scanf("%d%d", &n, &k);
| ~~~~~^~~~~~~~~~~~~~~~
main.cpp:217:36: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
217 | for (int i = 0; i < n; i++) scanf("%d", &as[i]);
| ~~~~~^~~~~~~~~~~~~~
ソースコード
/* -*- coding: utf-8 -*-
*
* 738.cc: No.738 平らな農地 - yukicoder
*/
#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
using namespace std;
/* constant */
const int MAX_N = 100000;
const long long LINF = 1LL << 60;
/* typedef */
typedef long long ll;
typedef pair<ll,ll> pll;
template <typename T, const int BUFSIZE>
struct TreapSum {
struct Node {
T key, minkey, sum;
int fix, size;
Node *left, *right;
void print(int k) {
printf("%d: key=%lld, minkey=%lld, sum=%lld, fix=%d, size=%d\n",
k, (ll)key, (ll)minkey, (ll)sum, fix, size);
}
void print() { print(0); }
};
typedef Node *node;
typedef pair<T,T> ptt;
node root, nullnode, buf;
Node buf0[BUFSIZE], buf1;
const T TINF;
TreapSum(T _TINF): TINF(_TINF) {
nullnode = &buf1;
nullnode->left = nullnode->right = nullnode;
nullnode->key = nullnode->minkey = TINF;
nullnode->sum = 0;
nullnode->fix = nullnode->size = 0;
clear();
srand(time(NULL));
}
void clear() { buf = buf0; root = nullnode; }
int size() { return root->size; }
T sum() { return root->sum; }
void update(node& t) {
t->size = 1 + t->left->size + t->right->size;
t->minkey = t->key;
if (t->minkey > t->left->minkey) t->minkey = t->left->minkey;
if (t->minkey > t->right->minkey) t->minkey = t->right->minkey;
t->sum = t->key + t->left->sum + t->right->sum;
}
node gen_node(T x) {
node t = buf++;
t->left = t->right = nullnode;
t->key = t->minkey = t->sum = x;
t->fix = rand();
t->size = 1;
return t;
}
void rot_l(node& k1) {
node k2 = k1->right;
k1->right = k2->left;
k2->left = k1;
update(k1);
update(k2);
k1 = k2;
}
void rot_r(node& k1) {
node k2 = k1->left;
k1->left = k2->right;
k2->right = k1;
update(k1);
update(k2);
k1 = k2;
}
void insert(node& t, T x) {
if (t == nullnode)
t = gen_node(x);
else {
//if (t->key == x) return;
if (x < t->key) {
insert(t->left, x);
update(t);
if (t->left->fix > t->fix) rot_r(t);
}
else {
insert(t->right, x);
update(t);
if (t->right->fix > t->fix) rot_l(t);
}
}
}
void insert(T x) { insert(root, x); }
void remove_node(node& t) {
if (t == nullnode) return;
if (t->left == nullnode || t->right == nullnode) {
if (t->left == nullnode)
t = t->right;
else
t = t->left;
}
else {
if (t->left->fix < t->right->fix) {
rot_l(t);
remove_node(t->left);
update(t);
}
else {
rot_r(t);
remove_node(t->right);
update(t);
}
}
}
void remove(node& t, T x) {
if (t != nullnode) {
if (t->key == x)
remove_node(t);
else if (x < t->key) {
remove(t->left, x);
update(t);
}
else {
remove(t->right, x);
update(t);
}
}
}
void remove(T x) { remove(root, x); }
ptt findat(int i) {
node t = root;
T lsum = 0;
while (t != nullnode) {
int lsize = t->left->size;
if (i == lsize) return ptt(t->key, lsum + t->left->sum);
if (i < lsize)
t = t->left;
else {
i -= lsize + 1;
lsum += t->key + t->left->sum;
t = t->right;
}
}
return ptt(TINF, 0);
}
void print(node t, int k, int indent) {
if (t == nullnode) return;
if (t != NULL) {
for (int i = 0; i < indent; i++) putchar(' '), putchar(' ');
t->print(k + t->left->size);
print(t->left, k, indent + 1);
print(t->right, k + t->left->size + 1, indent + 1);
}
}
void print() { print(root, 0, 0); }
void inorder(node t) {
if (t != nullnode && t != NULL) {
inorder(t->left);
cout << t->key << ' ';
inorder(t->right);
}
}
void inorder() {
inorder(root);
cout << endl;
}
};
/* global variables */
int as[MAX_N];
TreapSum<ll,MAX_N> trp(LINF);
/* subroutines */
/* main */
int main() {
int n, k;
scanf("%d%d", &n, &k);
for (int i = 0; i < n; i++) scanf("%d", &as[i]);
if (k == 1) {
puts("0");
return 0;
}
for (int i = 0; i < k - 1; i++) trp.insert(as[i]);
int hk = (k - 1) / 2;
ll mind = LINF;
for (int i = 0, j = k - 1; j < n; i++, j++) {
trp.insert(as[j]);
ll asum = trp.sum();
for (int dk = 0; dk < 2; dk++) {
int hk0 = hk + dk;
pll r = trp.findat(hk0);
ll &a0 = r.first, &lsum = r.second;
ll d = ((asum - lsum) - a0 * (k - hk0)) - (lsum - a0 * hk0);
if (mind > d) mind = d;
//printf("%d-%d: hk0=%d, asum=%lld, lsum=%lld, a0=%lld, d=%lld\n",
//i, j, hk0, asum, r.second, a0, d);
}
trp.remove(as[i]);
}
printf("%lld\n", mind);
return 0;
}
tnakao0123