結果

問題 No.340 雪の足跡
ユーザー koyumeishikoyumeishi
提出日時 2016-01-29 23:41:55
言語 C++11
(gcc 11.4.0)
結果
AC  
実行時間 347 ms / 1,000 ms
コード長 2,776 bytes
コンパイル時間 980 ms
コンパイル使用メモリ 99,656 KB
実行使用メモリ 27,008 KB
最終ジャッジ日時 2024-09-21 18:48:32
合計ジャッジ時間 5,957 ms
ジャッジサーバーID
(参考情報)
judge4 / judge5
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 2 ms
5,248 KB
testcase_01 AC 2 ms
5,376 KB
testcase_02 AC 2 ms
5,376 KB
testcase_03 AC 2 ms
5,376 KB
testcase_04 AC 1 ms
5,376 KB
testcase_05 AC 2 ms
5,376 KB
testcase_06 AC 2 ms
5,376 KB
testcase_07 AC 1 ms
5,376 KB
testcase_08 AC 1 ms
5,376 KB
testcase_09 AC 1 ms
5,376 KB
testcase_10 AC 1 ms
5,376 KB
testcase_11 AC 2 ms
5,376 KB
testcase_12 AC 2 ms
5,376 KB
testcase_13 AC 3 ms
5,376 KB
testcase_14 AC 13 ms
5,376 KB
testcase_15 AC 16 ms
5,376 KB
testcase_16 AC 11 ms
5,376 KB
testcase_17 AC 20 ms
5,376 KB
testcase_18 AC 17 ms
5,376 KB
testcase_19 AC 20 ms
5,504 KB
testcase_20 AC 182 ms
27,008 KB
testcase_21 AC 104 ms
5,376 KB
testcase_22 AC 42 ms
26,752 KB
testcase_23 AC 206 ms
27,008 KB
testcase_24 AC 165 ms
26,752 KB
testcase_25 AC 173 ms
26,880 KB
testcase_26 AC 26 ms
5,376 KB
testcase_27 AC 7 ms
5,376 KB
testcase_28 AC 24 ms
5,376 KB
testcase_29 AC 248 ms
16,896 KB
testcase_30 AC 162 ms
13,824 KB
testcase_31 AC 296 ms
24,960 KB
testcase_32 AC 347 ms
27,008 KB
testcase_33 AC 286 ms
27,008 KB
testcase_34 AC 346 ms
26,880 KB
testcase_35 AC 235 ms
27,008 KB
testcase_36 AC 231 ms
26,880 KB
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:30:22: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   30 |                 scanf("%d", &m);
      |                 ~~~~~^~~~~~~~~~
main.cpp:32:22: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   32 |                 scanf("%d", &pos);
      |                 ~~~~~^~~~~~~~~~~~
main.cpp:35:30: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   35 |                         scanf("%d", &next);
      |                         ~~~~~^~~~~~~~~~~~~

ソースコード

diff #

#include <iostream>
#include <vector>
#include <cstdio>
#include <sstream>
#include <map>
#include <string>
#include <algorithm>
#include <queue>
#include <cmath>
#include <functional>
#include <set>
#include <ctime>
#include <random>
using namespace std;
template<class T> istream& operator >> (istream& is, vector<T>& vec){for(T& val: vec) is >> val; return is;}
template<class T> istream& operator , (istream& is, T& val){ return is >> val;}
template<class T> ostream& operator << (ostream& os, vector<T>& vec){for(int i=0; i<vec.size(); i++) os << vec[i] << (i==vec.size()-1?"\n":" ");return os;}
template<class T> ostream& operator , (ostream& os, T& val){ return os << " " << val;}
template<class T> ostream& operator >> (ostream& os, T& val){ return os << " " << val;}

int main(){
	int w,h,n;
	cin >> w,h,n;

	vector<vector<int>> tate(2*h+1, vector<int>(w+1, 0));
	vector<vector<int>> yoko(h+1, vector<int>(2*w+1, 0));

	for(int i=0; i<n; i++){
		int m;
		scanf("%d", &m);
		int pos;
		scanf("%d", &pos);
		while(m--){
			int next;
			scanf("%d", &next);
			if(next%w == pos%w){ // tate
				int c = next%w;
				tate[2*min(pos/w, next/w)][c]++;
				tate[2*max(pos/w, next/w)+1][c]--;
			}else{ // yoko
				int r = next/w;
				yoko[r][2*min(pos%w, next%w)]++;
				yoko[r][2*max(pos%w, next%w)+1]--;
			}
			pos = next;
		}
	}

	for(int i=0; i<h; i++){
		int val = 0;
		for(int j=0; j<yoko[i].size(); j++){
			val += yoko[i][j];
			yoko[i][j] = val>0;
		}
	}
	for(int j=0; j<w; j++){
		int val = 0;
		for(int i=0; i<tate.size(); i++){
			val += tate[i][j];
			tate[i][j] = val>0;
		}
	}

	vector<vector<int>> dist(h+1, vector<int>(w+1, 10000000));
	vector<int> in_queue(h*w, 0);

	dist[0][0] = 0;

	vector<int> dx = {0,0,1,-1};
	vector<int> dy = {1,-1,0,0};

	queue<pair<int,int>> q;

	auto my_push = [&](int y, int x){
		if(in_queue[ x + y*w ]) return;
		in_queue[ x+y*w ] = 1;
		q.push({y,x});
	};

	auto my_pop = [&](){
		auto ret = q.front();
		q.pop();
		in_queue[ ret.first*w + ret.second ] = 0;
		return ret;
	};

	my_push(0,0);

	while(q.size()){
		auto pos = my_pop();

		int x = pos.second;
		int y = pos.first;
		for(int k__=0; k__<4; k__++){
			int new_x = x + dx[k__];
			int new_y = y + dy[k__];
			if(new_x < 0 || new_x >= w || new_y < 0 || new_y >= h) continue;
			if(x==new_x){
				if(tate[y+new_y][x]){
					if(dist[new_y][new_x] > dist[y][x] + 1){
						dist[new_y][new_x] = dist[y][x]+1;
						my_push(new_y, new_x);
					}
				}
			}else if(y==new_y){
				if(yoko[y][x+new_x]){
					if(dist[new_y][new_x] > dist[y][x] + 1){
						dist[new_y][new_x] = dist[y][x]+1;
						my_push(new_y, new_x);
					}
				}
			}
		}
	}

	if(dist[h-1][w-1] != 10000000){
		cout << dist[h-1][w-1] << endl;
	}else{
		cout << "Odekakedekinai.." << endl;
	}

	return 0;
}
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