結果
問題 | No.340 雪の足跡 |
ユーザー |
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提出日時 | 2016-02-03 17:11:40 |
言語 | C++11(廃止可能性あり) (gcc 13.3.0) |
結果 |
AC
|
実行時間 | 251 ms / 1,000 ms |
コード長 | 2,781 bytes |
コンパイル時間 | 1,967 ms |
コンパイル使用メモリ | 169,152 KB |
実行使用メモリ | 59,420 KB |
最終ジャッジ日時 | 2024-09-21 20:09:47 |
合計ジャッジ時間 | 5,641 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 5 |
other | AC * 32 |
ソースコード
#include <bits/stdc++.h>using namespace std;typedef long long ll;typedef unsigned long long ull;typedef long double ld;typedef pair<ll, ll> P;#define EACH(i,a) for (auto& i : a)#define FOR(i,a,b) for (ll i=(a);i<(b);i++)#define RFOR(i,a,b) for (ll i=(b)-1;i>=(a);i--)#define REP(i,n) for (ll i=0;i<(n);i++)#define RREP(i,n) for (ll i=(n)-1;i>=0;i--)#define debug(x) cout<<#x<<": "<<x<<endl#define pb push_back#define ALL(a) (a).begin(),(a).end()const ll linf = 1e18;const ll inf = 1e9;const double eps = 1e-12;const double pi = acos(-1);template<typename T>istream& operator>>(istream& is, vector<T>& vec) {EACH(x,vec) is >> x;return is;}template<typename T>ostream& operator<<(ostream& os, vector<T>& vec) {REP(i,vec.size()) {if (i) os << " ";os << vec[i];}return os;}template<typename T>ostream& operator<<(ostream& os, vector< vector<T> >& vec) {REP(i,vec.size()) {if (i) os << endl;os << vec[i];}return os;}ll W, H;ll m[2000][2000] = {0};ll mx[2000][2000] = {0};ll my[2000][2000] = {0};void initM() {REP(y, H+1) REP(x, W+1) {mx[y][x+1] += mx[y][x];}REP(y, H+1) REP(x, W+1) {my[y+1][x] += my[y][x];}REP(y, H+2) REP(x, W+2) {m[y][x] = mx[y][x] + my[y][x];}}P toP(ll idx) {return P(idx%W, idx/W);}void paint(ll a, ll b) {P p1 = toP(a), p2 = toP(b);ll x1 = p1.first, y1 = p1.second;ll x2 = p2.first, y2 = p2.second;// cout << a << " " << b << " " << x1 << " " << y1 << " " << x2 << " " << y2 << endl;if (x1 > x2) swap(x1, x2);if (y1 > y2) swap(y1, y2);if (x1 == x2) {++my[y1][x1];--my[y2][x1];}else {assert(y1 == y2);++mx[y1][x1];--mx[y1][x2];}}bool isOut(ll x, ll y) {return x < 0 || x >= W || y < 0 || y >= H;}struct Node { ll x, y, step; };ll dx[] = {0, 1, 0, -1};ll dy[] = {-1, 0, 1, 0};int main() {std::ios::sync_with_stdio(false);std::cin.tie(0);ll N; cin >> W >> H >> N;REP(i,N) {ll M; cin >> M;vector<ll> v(M+1); cin >> v;REP(j,M) {paint(v[j], v[j+1]);}}initM();/*REP(i,H) {REP(j,W) {cout << m[i][j] << " ";}cout << endl;}*/vector< vector<ll> > dist(H, vector<ll>(W, linf));queue<Node> Q; Q.push({0, 0, 0}); dist[0][0] = 0;while ( !Q.empty() ) {Node node = Q.front(); Q.pop();ll x = node.x, y = node.y, step = node.step;if ( isOut(x, y) ) continue;if (step > dist[y][x]) continue;REP(d, 4) {ll nx = x + dx[d];ll ny = y + dy[d];if ( !isOut(nx, ny) && step+1 < dist[ny][nx] ) {if ( (d % 2 == 0 && my[min(y, ny)][nx]) || (d % 2 == 1 && mx[ny][min(x, nx)]) ) {dist[ny][nx] = step+1;Q.push({nx, ny, step+1});}}}}if (dist[H-1][W-1] == linf) {cout << "Odekakedekinai.." << endl;}else {cout << dist[H-1][W-1] << endl;}}