結果
問題 | No.340 雪の足跡 |
ユーザー |
|
提出日時 | 2016-01-30 00:26:38 |
言語 | C++11(廃止可能性あり) (gcc 13.3.0) |
結果 |
AC
|
実行時間 | 276 ms / 1,000 ms |
コード長 | 4,232 bytes |
コンパイル時間 | 1,043 ms |
コンパイル使用メモリ | 103,164 KB |
実行使用メモリ | 19,344 KB |
最終ジャッジ日時 | 2024-09-21 18:53:47 |
合計ジャッジ時間 | 5,208 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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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 <fstream>#include <iostream>#include <iostream>#include <string>#include <vector>#include <map>#include <set>#include <numeric>#include <algorithm>#include <sstream>#include <queue>#include <stdexcept>#include <cstdio>#include <cstdlib>#include <cmath>#include <climits>#include <cfloat>#include <cassert>#include <unistd.h>#include <string.h>#include <stack>#include <list>using namespace std;int main(int argc, const char * argv[]){// sleep(1000);// insert code here...ios::sync_with_stdio(false);cin.tie(0);cout.precision(15);int W, H, N;cin >> W >> H >> N;vector< vector<bool> > maw(H, vector<bool>(W, false));vector< vector<bool> > mah(H, vector<bool>(W, false));vector< vector< pair<int, int> > >hlines(W);vector< vector< pair<int, int> > >wlines(H);for(int n=0;n<N;n++){int M;cin >> M; M++;int prev_h, prev_w;for(int m=0;m<M;m++){int B;cin >> B;int w, h;w = B%W;h = B/W;// cout << "m=" << m << ",B=" << B << " w=" << w << ",h=" << h << endl;if(m>=1){if(prev_h == h){int w1 = prev_w, w2 = w;if(w2<w1){swap(w1, w2);}//cout << "add wlines" << w1 << ", " << w2 << endl;wlines[h].push_back(make_pair(w1, w2));}else if(prev_w == w){int h1 = prev_h, h2 = h;if(h2<h1){swap(h1, h2);}hlines[w].push_back(make_pair(h1, h2));}else{printf("Wrong......\n");exit(1);}}prev_w = w;prev_h = h;}}for(int h=0;h<H;h++){sort(wlines[h].begin(), wlines[h].end());int endpos = -1;int cur = 0;bool prev=false;for(int w=0;w<W;w++){//cout << "cur=" << cur << ", h=" << h << ", w=" << w << endl;while(cur < wlines[h].size() && wlines[h][cur].first==w){//cout << "first=" << wlines[w][cur].first << ", second=" << wlines[w][cur].second << endl;endpos = max(endpos, wlines[h][cur].second);cur++;}if(w<=endpos){if(prev){maw[h][w-1] = true;}}prev = (w<endpos);}}for(int w=0;w<W;w++){sort(hlines[w].begin(), hlines[w].end());int endpos = -1;int cur = 0;bool prev = false;for(int h=0;h<H;h++){while(cur < hlines[w].size() && hlines[w][cur].first==h){endpos = max(endpos, hlines[w][cur].second);cur++;}if(h<=endpos){if(prev){mah[h-1][w] = true;}}prev = (h<endpos);}}queue< pair<int, int> > q;vector<int> used(W*H, false);q.push(make_pair(0,0));while(!q.empty()){auto pa = q.front();q.pop();int c = pa.first;int b = pa.second;if(used[b]){continue;}used[b] = true;//cout << "c=" << c << ", b=" << b << ", w=" << b%W << ", h=" << b/W << endl;if(b==W*H-1){cout << c << endl;exit(0);}int dx[]={0,1,0,-1};int dy[]={1,0,-1,0};for(int d=0;d<4;d++){int x = (b%W)+dx[d];int y = (b/W)+dy[d];if(x<0 || x>=W || y<0 || y>=H){continue;}int newb = y*W+x;if((d==0 && mah[y-1][x]) ||(d==2 && mah[y][x]) ||(d==1 && maw[y][x-1]) ||(d==3 && maw[y][x])){q.push(make_pair(c+1, newb));}}}cout << "Odekakedekinai.." << endl;return 0;}