Submission #93726

# Submission time Handle Problem Language Result Execution time Memory
93726 2019-01-10T22:44:49 Z nikolapesic2802 Robots (APIO13_robots) C++14
30 / 100
39 ms 26992 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/10;
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])
            if(dp[k][p.f][p.s]>=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;
    int t=(int)clock();
	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:90:9: warning: unused variable 't' [-Wunused-variable]
     int t=(int)clock();
         ^
robots.cpp:91:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%i %i %i",&n,&h,&w);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~
# Verdict Execution time Memory Grader output
1 Correct 12 ms 12664 KB Output is correct
2 Correct 12 ms 12664 KB Output is correct
3 Correct 12 ms 12668 KB Output is correct
4 Correct 12 ms 12664 KB Output is correct
5 Correct 12 ms 12664 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 12 ms 12664 KB Output is correct
2 Correct 12 ms 12664 KB Output is correct
3 Correct 12 ms 12668 KB Output is correct
4 Correct 12 ms 12664 KB Output is correct
5 Correct 12 ms 12664 KB Output is correct
6 Correct 12 ms 12664 KB Output is correct
7 Correct 12 ms 12792 KB Output is correct
8 Correct 12 ms 12792 KB Output is correct
9 Correct 12 ms 12664 KB Output is correct
10 Correct 13 ms 12792 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 12 ms 12664 KB Output is correct
2 Correct 12 ms 12664 KB Output is correct
3 Correct 12 ms 12668 KB Output is correct
4 Correct 12 ms 12664 KB Output is correct
5 Correct 12 ms 12664 KB Output is correct
6 Correct 12 ms 12664 KB Output is correct
7 Correct 12 ms 12792 KB Output is correct
8 Correct 12 ms 12792 KB Output is correct
9 Correct 12 ms 12664 KB Output is correct
10 Correct 13 ms 12792 KB Output is correct
11 Runtime error 39 ms 26992 KB Execution killed with signal 11 (could be triggered by violating memory limits)
12 Halted 0 ms 0 KB -
# Verdict Execution time Memory Grader output
1 Correct 12 ms 12664 KB Output is correct
2 Correct 12 ms 12664 KB Output is correct
3 Correct 12 ms 12668 KB Output is correct
4 Correct 12 ms 12664 KB Output is correct
5 Correct 12 ms 12664 KB Output is correct
6 Correct 12 ms 12664 KB Output is correct
7 Correct 12 ms 12792 KB Output is correct
8 Correct 12 ms 12792 KB Output is correct
9 Correct 12 ms 12664 KB Output is correct
10 Correct 13 ms 12792 KB Output is correct
11 Runtime error 39 ms 26992 KB Execution killed with signal 11 (could be triggered by violating memory limits)
12 Halted 0 ms 0 KB -