oj.uz

Submission #934816

# Submission time Handle Problem Language Result Execution time Memory
934816 2024-02-28T04:35:49 Z 8pete8 Robots (APIO13_robots) C++17
30 / 100
 414 ms 92620 KB 
#include<iostream>
#include<stack>
#include<map>
#include<vector>
#include<string>
#include<unordered_map>
#include <queue>
#include<cstring>
#include<cassert>
#include<limits.h>
#include<cmath>
#include<set>
#include<numeric> //gcd(a,b)
#include<algorithm>
#include<bitset> 
#include<stack>
using namespace std;
#define ll long long
#define f first
#define endl "\n"
#define s second
#define pii pair<int,int>
#define pppiiii pair<pii,pii>
#define ppii pair<int,pii>
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define pb push_back
//#define mp make_pair
#define lb lower_bound
#define ub upper_bound
#define fastio ios::sync_with_stdio(false);cin.tie(NULL);
#pragma GCC optimize ("03,unroll-loops")
#define int long long
const int mod=1e9+7,mxn=505,lg=30,inf=1e18,minf=-1e18,Mxn=2e6,root=700;
void setIO(string name){
	ios_base::sync_with_stdio(0); cin.tie(0);		
	freopen((name+".in").c_str(),"r",stdin);		
	freopen((name+".out").c_str(),"w",stdout);	
}	 
pii pos[10];
char grid[mxn+10][mxn+10];
int n,h,w;
int dist[mxn*mxn+10],go[mxn+10][mxn+10][4];
vector<int> dp[10][10];
vector<int>adj[mxn*mxn+10];
int get(int x,int y){
	return y+((x-1)*w);
}
int u[4]={1,0,-1,0},r[4]={0,-1,0,1};
bool valid(int x,int y){
	if(x<=0||x>h||y<=0||y>w)return false;
	if(grid[x][y]=='x')return false;
	return true;
}
struct node{
	int pos,stp;
	bool operator<(const node o)const{return stp>o.stp;}
};
void move(vector<int>&v){
	priority_queue<pii,vector<pii>,greater<pii>>pq;
	for(int i=1;i<=v.size();i++)if(v[i]!=inf)pq.push({v[i],i});
	while(!pq.empty()){
		int cur=pq.top().s,cost=pq.top().f;
		pq.pop();
		if(cost>v[cur])continue;
		for(auto i:adj[cur]){if(v[i]>v[cur]+1){
				v[i]=v[cur]+1;
				pq.push({v[i],i});
			}
		}
	}
	return;
}
int dp2[10][mxn*mxn+10];
int getnx(int x,int y,int di){
	if(grid[x][y]=='A')di--;
	else if(grid[x][y]=='C')di++;
	di=(di+4)%4;
	if(go[x][y][di])return go[x][y][di];
	int nx=x+u[di],ny=y+r[di];
	if(valid(nx,ny))return go[x][y][di]=getnx(nx,ny,di);
	return go[x][y][di]=get(x,y);
}
//41->21->11
void print(int i,int j){
	for(int x=1;x<=h;x++){
		for(int y=1;y<=w;y++)cout<<((dp[i][j][get(x,y)]==inf)?-1:dp[i][j][get(x,y)])<<" ";
		cout<<'\n';
	}
	cout<<'\n';
}
int32_t main(){
	fastio
	cin>>n>>w>>h;
	int ans=inf;
	for(int i=1;i<=n;i++)for(int j=1;j<=n;j++)dp[i][j].resize(h*(w+1),inf);
	for(int i=1;i<=n;i++)for(int x=1;x<=h*w;x++)dp2[i][x]=inf;
	for(int i=1;i<=h;i++)for(int j=1;j<=w;j++){
		cin>>grid[i][j];
		if(grid[i][j]>='1'&&grid[i][j]<='9')pos[grid[i][j]-'0']={i,j};
	}
	for(int i=1;i<=h;i++)for(int j=1;j<=w;j++)for(int k=0;k<4;k++)adj[get(i,j)].pb(getnx(i,j,k));
	for(int i=1;i<=n;i++){
		dp[i][i][get(pos[i].f,pos[i].s)]=0;
		move(dp[i][i]);
		//print(i,i);
	}
	for(int i=1;i<=n;i++)for(int j=i-1;j>=1;j--){
		for(int x=1;x<=h*w;x++){
				dp[i][j][x]=min(inf,dp[i][j+1][x]+dp[j][j][x]);
		}
		move(dp[i][j]);
	}
	for(int x=1;x<=h*w;x++){
		for(int i=1;i<=n;i++){
			for(int j=i;j>=1;j--)dp2[i][x]=min(dp2[i][x],dp[i][j][x]+dp2[j-1][x]);
		}
	}/*
	for(int x=1;x<=h;x++){
		for(int y=1;y<=w;y++)cout<<((dp2[n][get(x,y)]==inf)?-1:dp2[n][get(x,y)])<<" ";
		cout<<'\n';
	}
	cout<<'\n';
	*/
	for(int x=1;x<=h*w;x++)ans=min(ans,dp2[n][x]);
	cout<<((ans==inf)?-1:ans);
	/*
	for(int i=1;i<=2;i++){
		
		//break;
	}*/
	
	//for(int i=1;i<=h;i++)for(int j=1;j<=w;j++)ans=min(ans,dp[i][j][n]);
	/*
	1 2 3
 
 
	*/
}

Compilation message

robots.cpp: In function 'void move(std::vector<long long int>&)':
robots.cpp:61:15: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   61 |  for(int i=1;i<=v.size();i++)if(v[i]!=inf)pq.push({v[i],i});
      |              ~^~~~~~~~~~
robots.cpp: In function 'void setIO(std::string)':
robots.cpp:37:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |  freopen((name+".in").c_str(),"r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
robots.cpp:38:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |  freopen((name+".out").c_str(),"w",stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 12636 KB Output is correct
2 Correct 2 ms 12636 KB Output is correct
3 Correct 2 ms 12636 KB Output is correct
4 Correct 2 ms 12636 KB Output is correct
5 Correct 2 ms 12636 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 12636 KB Output is correct
2 Correct 2 ms 12636 KB Output is correct
3 Correct 2 ms 12636 KB Output is correct
4 Correct 2 ms 12636 KB Output is correct
5 Correct 2 ms 12636 KB Output is correct
6 Correct 2 ms 12636 KB Output is correct
7 Correct 2 ms 12636 KB Output is correct
8 Correct 2 ms 12636 KB Output is correct
9 Correct 2 ms 12636 KB Output is correct
10 Correct 2 ms 12636 KB Output is correct

Subtask #3
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 12636 KB Output is correct
2 Correct 2 ms 12636 KB Output is correct
3 Correct 2 ms 12636 KB Output is correct
4 Correct 2 ms 12636 KB Output is correct
5 Correct 2 ms 12636 KB Output is correct
6 Correct 2 ms 12636 KB Output is correct
7 Correct 2 ms 12636 KB Output is correct
8 Correct 2 ms 12636 KB Output is correct
9 Correct 2 ms 12636 KB Output is correct
10 Correct 2 ms 12636 KB Output is correct
11 Correct 139 ms 91656 KB Output is correct
12 Correct 19 ms 21080 KB Output is correct
13 Correct 44 ms 67412 KB Output is correct
14 Incorrect 414 ms 92620 KB Output isn't correct
15 Halted 0 ms 0 KB -

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 12636 KB Output is correct
2 Correct 2 ms 12636 KB Output is correct
3 Correct 2 ms 12636 KB Output is correct
4 Correct 2 ms 12636 KB Output is correct
5 Correct 2 ms 12636 KB Output is correct
6 Correct 2 ms 12636 KB Output is correct
7 Correct 2 ms 12636 KB Output is correct
8 Correct 2 ms 12636 KB Output is correct
9 Correct 2 ms 12636 KB Output is correct
10 Correct 2 ms 12636 KB Output is correct
11 Correct 139 ms 91656 KB Output is correct
12 Correct 19 ms 21080 KB Output is correct
13 Correct 44 ms 67412 KB Output is correct
14 Incorrect 414 ms 92620 KB Output isn't correct
15 Halted 0 ms 0 KB -