結果
| 問題 | No.3417 Tired Santa |
| コンテスト | |
| ユーザー |
tnakao0123
|
| 提出日時 | 2025-12-24 19:48:41 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.89.0) |
| 結果 |
AC
|
| 実行時間 | 10 ms / 2,000 ms |
| コード長 | 1,563 bytes |
| 記録 | |
| コンパイル時間 | 446 ms |
| コンパイル使用メモリ | 45,076 KB |
| 実行使用メモリ | 16,612 KB |
| 最終ジャッジ日時 | 2025-12-24 19:48:43 |
| 合計ジャッジ時間 | 1,755 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 25 |
コンパイルメッセージ
main.cpp: In function ‘int main()’:
main.cpp:34:8: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
34 | scanf("%d%d", &n, &st);
| ~~~~~^~~~~~~~~~~~~~~~~
main.cpp:35:36: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
35 | for (int i = 0; i < n; i++) scanf("%d", xs + i);
| ~~~~~^~~~~~~~~~~~~~
main.cpp:36:36: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
36 | for (int i = 0; i < n; i++) scanf("%d", wis + i);
| ~~~~~^~~~~~~~~~~~~~~
ソースコード
/* -*- coding: utf-8 -*-
*
* 3417.cc: No.3417 Tired Santa - yukicoder
*/
#include<cstdio>
#include<algorithm>
using namespace std;
/* constant */
const int MAX_N = 1000;
const long long LINF = 1LL << 62;
/* typedef */
using ll = long long;
/* global variables */
int xs[MAX_N], wis[MAX_N];
ll wss[MAX_N + 1];
ll dp0[MAX_N][MAX_N], dp1[MAX_N][MAX_N];
/* subroutines */
void setmin(ll &a, ll b) { if (a > b) a = b; }
/* main */
int main() {
int n, st;
scanf("%d%d", &n, &st);
for (int i = 0; i < n; i++) scanf("%d", xs + i);
for (int i = 0; i < n; i++) scanf("%d", wis + i);
for (int i = 0; i < n; i++) wss[i + 1] = wss[i] + wis[i];
for (int i = 0; i < n; i++)
for (int j = i; j < n; j++)
dp0[i][j] = dp1[i][j] = LINF;
int i1 = upper_bound(xs, xs + n, st) - xs;
int i0 = i1 - 1;
if (i0 >= 0) dp0[i0][i0] = dp1[i0][i0] = wss[n] * (st - xs[i0]);
if (i1 < n) dp0[i1][i1] = dp1[i1][i1] = wss[n] * (xs[i1] - st);
for (int l = 0; l < n - 1; l++)
for (int i = 0, j = l; j < n; i++, j++) {
ll w = wss[i] + (wss[n] - wss[j + 1]);
if (dp0[i][j] < LINF) {
if (i > 0)
setmin(dp0[i - 1][j], dp0[i][j] + w * (xs[i] - xs[i - 1]));
if (j + 1 < n)
setmin(dp1[i][j + 1], dp0[i][j] + w * (xs[j + 1] - xs[i]));
}
if (dp1[i][j] < LINF) {
if (i > 0)
setmin(dp0[i - 1][j], dp1[i][j] + w * (xs[j] - xs[i - 1]));
if (j + 1 < n)
setmin(dp1[i][j + 1], dp1[i][j] + w * (xs[j + 1] - xs[j]));
}
}
ll mind = min(dp0[0][n - 1], dp1[0][n - 1]);
printf("%lld\n", mind);
return 0;
}
tnakao0123