結果

問題 No.340 雪の足跡
ユーザー norioc
提出日時 2016-01-30 03:10:06
言語 C++11(廃止可能性あり)
(gcc 13.3.0)
結果
AC  
実行時間 338 ms / 1,000 ms
コード長 2,634 bytes
コンパイル時間 502 ms
コンパイル使用メモリ 52,480 KB
実行使用メモリ 22,728 KB
最終ジャッジ日時 2024-09-21 18:59:40
合計ジャッジ時間 4,946 ms
ジャッジサーバーID
(参考情報)
judge1 / judge3
このコードへのチャレンジ
(要ログイン)
ファイルパターン 結果
sample AC * 5
other AC * 32
権限があれば一括ダウンロードができます
コンパイルメッセージ
main.cpp: In function ‘int main()’:
main.cpp:69:14: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   69 |         scanf("%d %d %d", &w, &h, &n);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
main.cpp:80:22: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   80 |                 scanf("%d", &m);
      |                 ~~~~~^~~~~~~~~~
main.cpp:83:22: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   83 |                 scanf("%d", &fm);
      |                 ~~~~~^~~~~~~~~~~
main.cpp:86:30: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   86 |                         scanf("%d", &to);
      |                         ~~~~~^~~~~~~~~~~

ソースコード

diff #
プレゼンテーションモードにする

#include <cstdio>
#include <vector>
#include <map>
#include <cassert>
#include <queue>
using namespace std;
const int N = 1010;
struct D {
int row, col, cost;
D(int row, int col, int cost) : row(row), col(col), cost(cost) {}
};
void display(int rows, int cols, int g[][N][N]) {
puts("--- row ---");
for (int i = 0; i < rows; i++) {
for (int j = 0; j < cols; j++) {
printf(" %d", g[0][i][j]);
}
puts("");
}
puts("--- col ---");
for (int i = 0; i < rows; i++) {
for (int j = 0; j < cols; j++) {
printf(" %d", g[1][i][j]);
}
puts("");
}
}
int calc(int rows, int cols, int g[][N][N]) {
queue<D> q;
q.push(D(0, 0, 0));
static int used[N][N] = {};
while (!q.empty()) {
D d = q.front(); q.pop();
// printf("r:%d c:%d cost:%d\n", d.row, d.col, d.cost);
if (d.row == rows-1 && d.col == cols-1) return d.cost;
if (used[d.row][d.col]++) continue;
//
if (d.row > 0 && g[0][d.row-1][d.col] > 0)
q.push(D(d.row-1, d.col, d.cost+1));
//
if (d.row+1 < rows && g[0][d.row][d.col] > 0)
q.push(D(d.row+1, d.col, d.cost+1));
//
if (d.col+1 < cols && g[1][d.row][d.col] > 0)
q.push(D(d.row, d.col+1, d.cost+1));
//
if (d.col > 0 && g[1][d.row][d.col-1] > 0)
q.push(D(d.row, d.col-1, d.cost+1));
}
return -1;
}
int main() {
int w, h, n;
scanf("%d %d %d", &w, &h, &n);
static int g[2][N][N] = {}; // [or][][]
vector<pair<int, int> > cmap;
for (int i = 0; i < h; i++)
for (int j = 0; j < w; j++)
cmap.push_back(make_pair(i, j));
for (int i = 0; i < n; i++) {
int m;
scanf("%d", &m);
int fm;
scanf("%d", &fm);
for (int j = 0; j < m; j++) {
int to;
scanf("%d", &to);
// printf("%d -> %d\n", fm, to);
int r1 = cmap[fm].first;
int c1 = cmap[fm].second;
int r2 = cmap[to].first;
int c2 = cmap[to].second;
// printf("(%d %d) -> (%d %d)\n", r1, c1, r2, c2);
if (r1 != r2) {
assert(c1 == c2);
int fm = min(r1, r2);
int to = max(r1, r2);
g[0][fm][c1]++;
g[0][to][c1]--;
}
else if (c1 != c2) {
assert(r1 == r2);
int fm = min(c1, c2);
int to = max(c1, c2);
g[1][r1][fm]++;
g[1][r1][to]--;
}
else assert(false);
fm = to;
}
}
//
for (int c = 0; c < w; c++) {
for (int r = 1; r < h; r++) {
g[0][r][c] += g[0][r-1][c];
}
}
//
for (int r = 0; r < h; r++) {
for (int c = 1; c < w; c++) {
g[1][r][c] += g[1][r][c-1];
}
}
// display(h, w, g);
int ans = calc(h, w, g);
if (ans == -1) {
puts("Odekakedekinai..");
}
else {
printf("%d\n", ans);
}
}
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