結果
| 問題 |
No.340 雪の足跡
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2016-03-06 10:17:49 |
| 言語 | C++11(廃止可能性あり) (gcc 13.3.0) |
| 結果 |
AC
|
| 実行時間 | 186 ms / 1,000 ms |
| コード長 | 2,716 bytes |
| コンパイル時間 | 888 ms |
| コンパイル使用メモリ | 68,672 KB |
| 実行使用メモリ | 19,452 KB |
| 最終ジャッジ日時 | 2024-09-24 14:38:21 |
| 合計ジャッジ時間 | 4,695 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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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 ‘void read()’:
main.cpp:24:10: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
24 | scanf("%d%d%d", &col, &row, &nRoute);
| ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
main.cpp:33:14: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
33 | scanf("%d", &nPt);
| ~~~~~^~~~~~~~~~~~
main.cpp:39:18: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
39 | scanf("%d", &v);
| ~~~~~^~~~~~~~~~
ソースコード
#include<iostream>
#include<vector>
#include<queue>
#include<cstring>
#include<cstdio>
#define r first
#define c second
using namespace std;
typedef pair<int, int> Point;
const int BUF = 1005;
int dr[] = {1, 0, -1, 0};
int dc[] = {0, 1, 0, -1};
int row, col;
bool canPass[BUF][BUF][4];
void read() {
memset(canPass, 0, sizeof(canPass));
int nRoute;
scanf("%d%d%d", &col, &row, &nRoute);
static int hLineDiff[BUF][BUF];
static int vLineDiff[BUF][BUF];
memset(hLineDiff, 0 , sizeof(hLineDiff));
memset(vLineDiff, 0 , sizeof(vLineDiff));
for (int i = 0; i < nRoute; ++i) {
int nPt;
scanf("%d", &nPt);
nPt++;
vector<Point> ptList;
for (int j = 0; j < nPt; ++j) {
int v;
scanf("%d", &v);
ptList.push_back(Point(v / col, v % col));
}
for (int j = 0; j + 1 < nPt; ++j) {
Point &cur = ptList[j];
Point &nex = ptList[j + 1];
if (cur.r == nex.r) {
++hLineDiff[cur.r][min(cur.c, nex.c)];
--hLineDiff[cur.r][max(cur.c, nex.c)];
}
else {
++vLineDiff[min(cur.r, nex.r)][cur.c];
--vLineDiff[max(cur.r, nex.r)][cur.c];
}
}
}
for (int r = 0; r < row; ++r) {
int sum = 0;
for (int c = 0; c + 1 < col; ++c) {
sum += hLineDiff[r][c];
if (sum > 0) {
canPass[r][c][1] = canPass[r][c + 1][3] = true;
}
}
}
for (int c = 0; c < col; ++c) {
int sum = 0;
for (int r = 0; r + 1 < row; ++r) {
sum += vLineDiff[r][c];
if (sum > 0) {
canPass[r][c][0] = canPass[r + 1][c][2] = true;
}
}
}
}
void work() {
static int cost[BUF][BUF];
queue<Point> Q;
memset(cost, -1, sizeof(cost));
cost[0][0] = 0;
Q.push(Point(0, 0));
while (!Q.empty()) {
Point cur = Q.front();
Q.pop();
if (cur.r == row - 1 && cur.c == col - 1) {
cout << cost[cur.r][cur.c] << endl;
return;
}
for (int i = 0; i < 4; ++i) {
int nr = cur.r + dr[i];
int nc = cur.c + dc[i];
if (!canPass[cur.r][cur.c][i]) continue;
if (!(0 <= nr && nr < row && 0 <= nc && nc < col)) continue;
if (cost[nr][nc] != -1) continue;
cost[nr][nc] = cost[cur.r][cur.c] + 1;
Q.push(Point(nr, nc));
}
}
cout << "Odekakedekinai.." << endl;
}
int main() {
read();
work();
return 0;
}