oj.uz

Submission #93718

# Submission time Handle Problem Language Result Execution time Memory
93718 2019-01-10T22:32:47 Z nikolapesic2802 Robots (APIO13_robots) C++14
60 / 100
 1500 ms 145344 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/rope>

#define ll long long
#define pb push_back
#define sz(x) (int)(x).size()
#define mp make_pair
#define f first
#define s second
#define all(x) x.begin(), x.end()

using namespace std;
using namespace __gnu_pbds;
using namespace __gnu_cxx;

template<class T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag,tree_order_statistics_node_update>; ///find_by_order(),order_of_key()
template<class T1, class T2> ostream& operator<<(ostream& os, const pair<T1,T2>& a) { os << '{' << a.f << ", " << a.s << '}'; return os; }
template<class T> ostream& operator<<(ostream& os, const vector<T>& a){os << '{';for(int i=0;i<sz(a);i++){if(i>0&&i<sz(a))os << ", ";os << a[i];}os<<'}';return os;}
template<class T> ostream& operator<<(ostream& os, const set<T>& a) {os << '{';int i=0;for(auto p:a){if(i>0&&i<sz(a))os << ", ";os << p;i++;}os << '}';return os;}
template<class T> ostream& operator<<(ostream& os, const multiset<T>& a) {os << '{';int i=0;for(auto p:a){if(i>0&&i<sz(a))os << ", ";os << p;i++;}os << '}';return os;}
template<class T1,class T2> ostream& operator<<(ostream& os, const map<T1,T2>& a) {os << '{';int i=0;for(auto p:a){if(i>0&&i<sz(a))os << ", ";os << p;i++;}os << '}';return os;}
const int N=9;
const int H=500;
const int maxDist=H*H*N;
int n,h,w;
vector<int> dx={-1,0,1,0},dy={0,1,0,-1};
pair<int,int> dest[H][H][4],null={-1,-1};
vector<string> board;
bool end(int i,int j)
{
    return i<0||i>=h||j<0||j>=w||board[i][j]=='x';
}
void sub(int &a,int b)
{
    a-=b;
    if(a<0)
        a+=4;
}
void add(int &a,int b)
{
    a+=b;
    if(a>=4)
        a-=4;
}
pair<int,int> dfs(int i,int j,int p)
{
    int pp=p;
    if(dest[i][j][p]!=null)
        return dest[i][j][p];
    if(end(i,j))
        return dest[i][j][p]=make_pair(i,j);
    if(board[i][j]=='A')
        sub(p,1);
    if(board[i][j]=='C')
        add(p,1);
    i+=dx[p];
    j+=dy[p];
    if(end(i,j))
        return dest[i-dx[p]][j-dy[p]][pp]=make_pair(i-dx[p],j-dy[p]);
    return dest[i-dx[p]][j-dy[p]][pp]=dfs(i,j,p);
}
vector<vector<vector<int> > > dp;
vector<vector<int> > initial_dp(H,vector<int>(H,(int)1e9));
int mask[H][H];
vector<pair<int,int> > q[maxDist];
void update(int k,int x,int y,int d)
{
    if(d<dp[k][x][y])
    {
        dp[k][x][y]=d;
        q[d].pb({x,y});
    }
}
void bfs(int k)
{
    for(int i=0;i<maxDist;i++)
        for(auto p:q[i])
            for(int l=0;l<4;l++)
                update(k,dest[p.f][p.s][l].f,dest[p.f][p.s][l].s,i+1);
}
int main()
{
    for(int i=0;i<H;i++)
        for(int j=0;j<H;j++)
            for(int k=0;k<4;k++)
                dest[i][j][k]=null;
	scanf("%i %i %i",&n,&h,&w);
	swap(h,w);
	board.resize(h);
	for(int i=0;i<h;i++)
        cin >> board[i];
    for(int i=0;i<h;i++)
        for(int j=0;j<w;j++)
            for(int k=0;k<4;k++)
                dfs(i,j,k);
    vector<pair<int,int> > pos(n);
    for(int i=0;i<h;i++)
        for(int j=0;j<w;j++)
        {
            int t=board[i][j]-'0';
            if(t>0&&t<10)
                pos[t-1]=make_pair(i,j);
        }
    for(int i=0,k=0;i<n;i++)
    {
        for(int j=i;j>=0;j--,k++)
        {
            mask[j][i]=k;
            dp.pb(initial_dp);
            if(j==i)
                update(k,pos[j].f,pos[j].s,0);
            else
                for(int x=0;x<h;x++)
                    for(int y=0;y<w;y++)
                        for(int l=j;l<i;l++)
                            update(k,x,y,dp[mask[j][l]][x][y]+dp[mask[l+1][i]][x][y]);
            bfs(k);
            for(int l=0;l<maxDist;l++)
                q[l].clear();
        }
    }
    int ans=1e9;
    for(int x=0;x<h;x++)
        for(int y=0;y<w;y++)
            ans=min(ans,dp[mask[0][n-1]][x][y]);
    if(ans==(int)1e9)
        printf("-1\n");
    else
        printf("%i\n",ans);
    return 0;
}

Compilation message

robots.cpp: In function 'int main()':
robots.cpp:85:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     for(int i=0;i<H;i++)
     ^~~
robots.cpp:89:2: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
  scanf("%i %i %i",&n,&h,&w);
  ^~~~~
robots.cpp:89:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%i %i %i",&n,&h,&w);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 96 ms 65016 KB Output is correct
2 Correct 98 ms 65016 KB Output is correct
3 Correct 99 ms 65016 KB Output is correct
4 Correct 94 ms 65016 KB Output is correct
5 Correct 91 ms 64944 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 96 ms 65016 KB Output is correct
2 Correct 98 ms 65016 KB Output is correct
3 Correct 99 ms 65016 KB Output is correct
4 Correct 94 ms 65016 KB Output is correct
5 Correct 91 ms 64944 KB Output is correct
6 Correct 92 ms 64916 KB Output is correct
7 Correct 111 ms 65080 KB Output is correct
8 Correct 109 ms 65016 KB Output is correct
9 Correct 108 ms 65068 KB Output is correct
10 Correct 108 ms 64988 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 96 ms 65016 KB Output is correct
2 Correct 98 ms 65016 KB Output is correct
3 Correct 99 ms 65016 KB Output is correct
4 Correct 94 ms 65016 KB Output is correct
5 Correct 91 ms 64944 KB Output is correct
6 Correct 92 ms 64916 KB Output is correct
7 Correct 111 ms 65080 KB Output is correct
8 Correct 109 ms 65016 KB Output is correct
9 Correct 108 ms 65068 KB Output is correct
10 Correct 108 ms 64988 KB Output is correct
11 Correct 1018 ms 111740 KB Output is correct
12 Correct 83 ms 63736 KB Output is correct
13 Correct 597 ms 90184 KB Output is correct
14 Correct 1268 ms 119264 KB Output is correct
15 Correct 1050 ms 108592 KB Output is correct

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 96 ms 65016 KB Output is correct
2 Correct 98 ms 65016 KB Output is correct
3 Correct 99 ms 65016 KB Output is correct
4 Correct 94 ms 65016 KB Output is correct
5 Correct 91 ms 64944 KB Output is correct
6 Correct 92 ms 64916 KB Output is correct
7 Correct 111 ms 65080 KB Output is correct
8 Correct 109 ms 65016 KB Output is correct
9 Correct 108 ms 65068 KB Output is correct
10 Correct 108 ms 64988 KB Output is correct
11 Correct 1018 ms 111740 KB Output is correct
12 Correct 83 ms 63736 KB Output is correct
13 Correct 597 ms 90184 KB Output is correct
14 Correct 1268 ms 119264 KB Output is correct
15 Correct 1050 ms 108592 KB Output is correct
16 Correct 1049 ms 107560 KB Output is correct
17 Execution timed out 1574 ms 145344 KB Time limit exceeded
18 Halted 0 ms 0 KB -