結果
問題 | No.340 雪の足跡 |
ユーザー |
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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 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 5 |
other | AC * 32 |
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
#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;// 上if (d.row > 0 && g[0][d.row-1][d.col] > 0)q.push(D(d.row-1, d.col, d.cost+1));// 下if (d.row+1 < rows && g[0][d.row][d.col] > 0)q.push(D(d.row+1, d.col, d.cost+1));// 右if (d.col+1 < cols && g[1][d.row][d.col] > 0)q.push(D(d.row, d.col+1, d.cost+1));// 左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] = {}; // [行or列どちら方向か][行][列]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;}}// 行方向を足し上げるfor (int c = 0; c < w; c++) {for (int r = 1; r < h; r++) {g[0][r][c] += g[0][r-1][c];}}// 列方向を足し上げる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);}}