Submission #897147

#TimeUsernameProblemLanguageResultExecution timeMemory
897147AiperiiiGolf (JOI17_golf)C++14
0 / 100
79 ms70740 KiB
#include <bits/stdc++.h> #define int long long #define all(x) x.begin(),x.end() #define ff first #define ss second #define pb push_back using namespace std; const int N=1e3+5; int dis[N][N][2],vld[N][N],vis[N][N][2],frnd[N][N][4]; signed main(){ int s,t,u,v; cin>>s>>t>>u>>v; int n; cin>>n; for(int i=1;i<N;i++){ for(int j=1;j<N;j++){ frnd[i][j][0]=1; frnd[i][j][1]=1; frnd[i][j][2]=1; frnd[i][j][3]=1; } } for(int i=0;i<n;i++){ int a,b,c,d; cin>>a>>b>>c>>d; for(int x=a;x<=b;x++){ for(int y=c;y<=d;y++){ vld[x][y]=2; } } for(int x=a;x<=b;x++){ vld[x][c]=1;vld[x][d]=1; } for(int x=a+1;x<b;x++){ frnd[x][c][2]=0; frnd[x][d][3]=0; } for(int y=c;y<=d;y++){ vld[a][y]=1;vld[b][y]=1; } for(int y=c+1;y<d;y++){ frnd[a][y][0]=0; frnd[b][y][1]=0; } } queue <pair <int,int> > q; q.push({s,t}); q.push({s,t}); vis[s][t][0]=1; vis[s][t][1]=1; dis[s][t][1]=1; dis[s][t][0]=1; while(!q.empty()){ int x=q.front().ff; int y=q.front().ss; q.pop(); if(x+1<=1000 && vld[x+1][y]<=1 && !vis[x+1][y][0] && frnd[x][y][0]){ if(dis[x][y][0]){ vis[x+1][y][0]=1; dis[x+1][y][0]=dis[x][y][0]; q.push({x+1,y}); } else if(dis[x][y][1]){ vis[x+1][y][0]=1; dis[x+1][y][0]=dis[x][y][1]+1; q.push({x+1,y}); } } if(x-1>=1 && vld[x-1][y]<=1 && !vis[x-1][y][0] && frnd[x][y][1]){ if(dis[x][y][0]){ vis[x-1][y][0]=1; dis[x-1][y][0]=dis[x][y][0]; q.push({x-1,y}); } else if(dis[x][y][1]){ vis[x-1][y][0]=1; dis[x-1][y][0]=dis[x][y][1]+1; q.push({x-1,y}); } } if(y+1<=1000 && vld[x][y+1]<=1 && !vis[x][y+1][1] && frnd[x][y][2]){ if(dis[x][y][1]){ vis[x][y+1][1]=1; dis[x][y+1][1]=dis[x][y][1]; q.push({x,y+1}); } else if(dis[x][y][0]){ vis[x][y+1][1]=1; dis[x][y+1][1]=dis[x][y][0]+1; q.push({x,y+1}); } } if(y-1>=1 && vld[x][y-1]<=1 && !vis[x][y-1][1] && frnd[x][y][3]){ if(dis[x][y][1]){ vis[x][y-1][1]=1; dis[x][y-1][1]=dis[x][y][1]; q.push({x,y-1}); } else if(dis[x][y][0]){ vis[x][y-1][1]=1; dis[x][y-1][1]=dis[x][y][0]+1; q.push({x,y-1}); } } } cout<<min(dis[u][v][0],dis[u][v][1])<<"\n"; }
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