oj.uz

Submission #284511

# Submission time Handle Problem Language Result Execution time Memory
284511 2020-08-27T14:22:28 Z Saacoota Robots (APIO13_robots) C++14
100 / 100
 790 ms 90436 KB 
#include    <bits/stdc++.h>
#define fo(i,a,b) for(int i=(a);i<=(b);++i)
#define fd(i,a,b) for(int i=(a);i>=(b);--i)
#define rep(i,a,b)  for(int i=(a);i<(b);++i)
#define fi  first
#define se  second
#define LL  unsigned long long
#define uint unsigned int
#define pb  push_back
#define eb  emplace_back
#define bit(s,i) ((s >> i) & 1)
#define off(s,i) (s & (~ (1 << i)))
#define ii pair <int , int>
#define iii1 pair <ii , int>
#define iii2 pair <int , ii>
#define TASK "AROBOT"
using   namespace   std;
const int oo = 1e9 + 5;
int n , m , r;
int dp[10][10][502][502];
ii null , f[502][502][4];
bool vs[502][502];
string s[502];
int dx[] = { 0 , -1 , 0 , 1};
int dy[] = { 1 , 0 , -1 , 0};
///--------------------------
ii F(int x,int y,int direct) {
    if (f[x][y][direct] != null) return f[x][y][direct];
    ii &res = f[x][y][direct];
    if (vs[x][y]) {
        res = ii(x,y);
        return res;
    }
    vs[x][y] = true;
    if (s[x][y] != 'A' && s[x][y] != 'C') {
        int nx = x + dx[direct] , ny = y + dy[direct];
        if (nx < 1 || nx > m || ny < 1 || ny > n || s[nx][ny] == 'x') res = ii(x , y);
        else res = F(nx , ny , direct);
    } else {
        int ndirect = direct;
        if (s[x][y] == 'A') ndirect++;
        else ndirect--;
        ndirect = (ndirect + 4) % 4;
        int nx = x + dx[ndirect] , ny = y + dy[ndirect];
        if (nx < 1 || nx > m || ny < 1 || ny > n || s[nx][ny] == 'x') res = ii(x , y);
        else res = F(nx , ny , ndirect);
    }
    vs[x][y] = false;
    return res;
}
///--------------------------
void readf() {
    cin >> r >> n >> m ;
    for (int i = 1 ; i <= m ; ++i) {
        cin >> s[i];
        s[i] = " " + s[i];
    }
}
///--------------------------
void solve() {
    null = ii(0,0);
    for (int i = 1 ; i <= r ; ++i)
    for (int j = 1 ; j <= r ; ++j)
    for (int x = 1 ; x <= m ; ++x)
    for (int y = 1 ; y <= n ; ++y) dp[i][j][x][y] = oo;
    for (int i = 1 ; i <= m ; ++i)
    for (int j = 1 ; j <= n ; ++j) {
        if (s[i][j] != 'x') {
            for (int k = 0 ; k < 4 ; ++k)
            if (f[i][j][k] == null) f[i][j][k] = F(i , j , k);
        }
        if ('1' <= s[i][j] && s[i][j] <= '9') dp[s[i][j] - '0'][s[i][j] - '0'][i][j] = 0;
    }
    for (int d = 0 ; d < r ; ++d)
    for (int i = 1 ; i <= r - d ; ++i) {
        vector < iii2 > wa;
        int j = i + d;
        for (int x = 1 ; x <= m ; ++x)
        for (int y = 1 ; y <= n ; ++y) {
            for (int k = i ; k < j ; ++k)
            dp[i][j][x][y] = min(dp[i][j][x][y] , dp[i][k][x][y] + dp[k+1][j][x][y]);
            if (dp[i][j][x][y] < oo) {
                wa.pb({dp[i][j][x][y] , {x , y}});
            }
        }
        stack < iii2 > stk , pa;
        sort(wa.rbegin(),wa.rend());
        for (auto x : wa) stk.push(x);
        while (!stk.empty()) {
            int val = stk.top().fi;
            while (!stk.empty() && stk.top().fi == val) {
                pa.push(stk.top());
                stk.pop();
            }
            while (!pa.empty()) {
                int x = pa.top().se.fi , y = pa.top().se.se;
                pa.pop();
                for (int k = 0 ; k < 4 ; ++k) {
                    int nx = f[x][y][k].fi , ny = f[x][y][k].se;
                    if (nx == x && ny == y) continue;
                    if (dp[i][j][nx][ny] > val + 1) {
                        dp[i][j][nx][ny] = val + 1;
                        stk.push({val + 1 , f[x][y][k]});
                    }
                }
            }
        }
    }
    int ans = oo;
    for (int i = 1 ; i <= m ; ++i)
    for (int j = 1 ; j <= n ; ++j) ans = min(ans , dp[1][r][i][j]);
    if (ans < oo) cout << ans;
    else cout << -1;
}
///--------------------------
main() {
   ios::sync_with_stdio(0);
   cin.tie(0);cout.tie(0);
   readf();
   solve();
}

Compilation message

robots.cpp:116:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  116 | main() {
      |      ^

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 0 ms 512 KB Output is correct
5 Correct 1 ms 544 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 0 ms 512 KB Output is correct
5 Correct 1 ms 544 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 0 ms 512 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 0 ms 512 KB Output is correct
5 Correct 1 ms 544 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 0 ms 512 KB Output is correct
11 Correct 107 ms 52280 KB Output is correct
12 Correct 8 ms 4480 KB Output is correct
13 Correct 35 ms 33664 KB Output is correct
14 Correct 296 ms 52920 KB Output is correct
15 Correct 73 ms 51984 KB Output is correct

Subtask #4
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 0 ms 512 KB Output is correct
5 Correct 1 ms 544 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 0 ms 512 KB Output is correct
11 Correct 107 ms 52280 KB Output is correct
12 Correct 8 ms 4480 KB Output is correct
13 Correct 35 ms 33664 KB Output is correct
14 Correct 296 ms 52920 KB Output is correct
15 Correct 73 ms 51984 KB Output is correct
16 Correct 124 ms 88952 KB Output is correct
17 Correct 790 ms 90436 KB Output is correct
18 Correct 160 ms 88816 KB Output is correct
19 Correct 119 ms 88952 KB Output is correct
20 Correct 468 ms 89828 KB Output is correct