結果
| 問題 |
No.1638 Robot Maze
|
| コンテスト | |
| ユーザー |
Ricky_pon
|
| 提出日時 | 2021-08-06 21:43:13 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 3 ms / 2,000 ms |
| コード長 | 2,736 bytes |
| コンパイル時間 | 2,025 ms |
| コンパイル使用メモリ | 198,732 KB |
| 最終ジャッジ日時 | 2025-01-23 14:55:46 |
|
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 49 |
コンパイルメッセージ
main.cpp: In function ‘int main()’:
main.cpp:91:10: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
91 | scanf("%d%d", &h, &w);
| ~~~~~^~~~~~~~~~~~~~~~
main.cpp:92:20: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
92 | rep(i, 4) scanf("%d", &cost[i]);
| ~~~~~^~~~~~~~~~~~~~~~
main.cpp:94:10: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
94 | scanf("%lld%lld", &K, &P);
| ~~~~~^~~~~~~~~~~~~~~~~~~~
main.cpp:96:10: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
96 | scanf("%d%d%d%d", &sx, &sy, &gx, &gy);
| ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
main.cpp:102:30: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
102 | rep(i, h) rep(j, w) scanf(" %c", &c[i][j]);
| ~~~~~^~~~~~~~~~~~~~~~~
ソースコード
#include <bits/stdc++.h>
#include <algorithm>
#include <cassert>
#include <vector>
template <class T>
bool chmax(T &a, const T &b) {
if (a < b) {
a = b;
return true;
}
return false;
}
template <class T>
bool chmin(T &a, const T &b) {
if (a > b) {
a = b;
return true;
}
return false;
}
template <class T>
T div_floor(T a, T b) {
if (b < 0) a *= -1, b *= -1;
return a >= 0 ? a / b : (a + 1) / b - 1;
}
template <class T>
T div_ceil(T a, T b) {
if (b < 0) a *= -1, b *= -1;
return a > 0 ? (a - 1) / b + 1 : a / b;
}
template <typename T>
struct CoordComp {
std::vector<T> v;
bool sorted;
CoordComp() : sorted(false) {}
int size() { return v.size(); }
void add(T x) { v.push_back(x); }
void build() {
std::sort(v.begin(), v.end());
v.erase(std::unique(v.begin(), v.end()), v.end());
sorted = true;
}
int get_idx(T x) {
assert(sorted);
return lower_bound(v.begin(), v.end(), x) - v.begin();
}
T &operator[](int i) { return v[i]; }
};
#define For(i, a, b) for (int i = (int)(a); (i) < (int)(b); ++(i))
#define rFor(i, a, b) for (int i = (int)(a)-1; (i) >= (int)(b); --(i))
#define rep(i, n) For(i, 0, n)
#define rrep(i, n) rFor(i, n, 0)
#define fi first
#define se second
using namespace std;
using lint = long long;
using pii = pair<int, int>;
using pll = pair<lint, lint>;
int dx[4] = {-1, 1, 0, 0};
int dy[4] = {0, 0, 1, -1};
int cost[4];
struct state {
int x, y;
lint d;
state(int x, int y, lint d) : x(x), y(y), d(d) {}
};
int main() {
int h, w;
scanf("%d%d", &h, &w);
rep(i, 4) scanf("%d", &cost[i]);
lint K, P;
scanf("%lld%lld", &K, &P);
int sx, sy, gx, gy;
scanf("%d%d%d%d", &sx, &sy, &gx, &gy);
--sx;
--sy;
--gx;
--gy;
char c[h][w];
rep(i, h) rep(j, w) scanf(" %c", &c[i][j]);
lint dist[h][w];
rep(i, h) rep(j, w) dist[i][j] = LLONG_MAX;
dist[sx][sy] = 0;
auto cmp = [](const state &s1, const state &s2) { return s1.d > s2.d; };
priority_queue<state, vector<state>, decltype(cmp)> que(cmp);
que.push({sx, sy, 0});
while (!que.empty()) {
auto [x, y, d] = que.top();
que.pop();
if (d > dist[x][y]) continue;
rep(i, 4) {
int nx = x + dx[i], ny = y + dy[i];
if (0 <= nx && nx < h && 0 <= ny && ny < w && c[nx][ny] != '#') {
lint nd = d + cost[i] + (c[nx][ny] == '@' ? P : 0);
if (chmin(dist[nx][ny], nd)) {
que.push({nx, ny, nd});
}
}
}
}
puts(dist[gx][gy] <= K ? "Yes" : "No");
// cout << dist[gx][gy] << endl;
}
Ricky_pon