Submission #1125178

#	Time	Username	Problem	Language	Result	Execution time	Memory
1125178		cpptowin	Toy (CEOI24_toy)	C++20	14 / 100	1597 ms	112664 KiB

Main

#include <bits/stdc++.h>
#define fo(i, d, c) for (int i = d; i <= c; i++)
#define fod(i, c, d) for (int i = c; i >= d; i--)
#define maxn 1000010
#define N 1510
#define fi first
#define se second
#define pb emplace_back
#define en cout << "\n";
#define int long long
#define inf (int)1e18
#define bitcount(x) __builtin_popcountll(x)
#define pii pair<int, int>
#define vii vector<pii>
#define lb(x) x & -x
#define bit(i, j) ((i >> j) & 1)
#define offbit(i, j) (i ^ (1LL << j))
#define onbit(i, j) (i | (1LL << j))
#define vi vector<int>
#define all(x) x.begin(), x.end()
#define ss(x) (int)x.size()
#define UNIQUE(v) v.erase(unique(all(v)),v.end())
template <typename T1, typename T2>
bool minimize(T1 &a, T2 b)
{
    if (a > b)
    {
        a = b;
        return true;
    }
    return false;
}
template <typename T1, typename T2>
bool maximize(T1 &a, T2 b)
{
    if (a < b)
    {
        a = b;
        return true;
    }
    return false;
}
using namespace std;
const int nsqrt = 450;
const int mod = 1e9 + 7;
void add(int &x, int k)
{
    x += k;
    x %= mod;
    if(x < 0) x += mod;
}
void del(int &x, int k)
{
    x -= k;
    x %= mod;
    if(x < 0) x += mod;
}
int n,m,k,l;
int a[N][N],p[N][N];
pii s,t,f;
int get(int l,int r,int u,int v)
{
    return p[u][v] - p[l - 1][v] - p[u][r - 1] + p[l - 1][r - 1];
}
bool save1(pii x)
{
    return x.fi and x.fi <= n - k + 1 and x.se and x.se <= m and get(x.fi,x.se,x.fi + k - 1,x.se) == 0;
}
bool save2(pii x)
{
    return x.fi and x.fi <= n and x.se and x.se <= m - l + 1 and get(x.fi,x.se,x.fi,x.se + l - 1) == 0;
}
bool save(pii x,pii y)
{
    return x.fi <= y.fi and x.fi + k - 1 >= y.fi and y.se <= x.se and y.se + l - 1 >= x.se;
}
bool ok1(pii x)
{
    return x.fi <= f.fi and x.fi + k - 1 >= f.fi and x.se == f.se;
}
bool ok2(pii x)
{
    return x.fi == f.fi and x.se <= f.se and x.se + l - 1 >= f.se;
}
int dx[] = {1,-1,0,0};
int dy[] = {0,0,1,-1};
main()
{
#define name "TASK"
    if (fopen(name ".inp", "r"))
    {
        freopen(name ".inp", "r", stdin);
        freopen(name ".out", "w", stdout);
    }
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cin >> m >> n >> l >> k;
    cin >> t.se >> t.fi >> s.se >> s.fi;
    t.fi++,t.se++,s.fi++,s.se++;
//    cout << t.fi << ' ' << t.se << ' ' << s.fi << ' ' << s.se;en;
    fo(i,1,n) fo(j,1,m)
    {
        char t;cin >> t;
        if(t == 'X') a[i][j] = 1;
        if(t == '*') f = {i,j};
        p[i][j] = p[i - 1][j] + p[i][j - 1] - p[i - 1][j - 1] + a[i][j];
    }
//    cout << f.fi << ' ' << f.se;en;
    map<pair<pii,pii>,bool> vis;
    queue<pair<pii,pii>> q;
    q.push({s,t});
    while(ss(q))
    {
        auto [x,y] = q.front();
        q.pop();
        if(ok1(x) and ok2(y))
        {
//            cout << x.fi << ' ' << x.se << ' ' << y.fi << ' ' << y.se;en;
            return cout << "YES",0;
        }
        fo(k,0,3)
        {
            pii x1 = {x.fi + dx[k],x.se + dy[k]};
//            cout << x1.fi << 'x' << x1.se << ' ' << y.fi << ' ' << y.se;en;
            if(save1(x1) and save(x1,y) and !vis.count({x1,y}))
                {
//                    cout << x1.fi << ' ' << x1.se << ' ' << y.fi << ' ' << y.se;en;
                    vis[{x1,y}] = 1;
                    q.push({x1,y});
                }
            pii y1 = {y.fi + dx[k],y.se + dy[k]};
            if(save2(y1) and save(x,y1) and !vis.count({x,y1}))
                {
//                    cout << x.fi << ' ' << x.se << ' ' << y1.fi << ' ' << y1.se;en;
                    vis[{x,y1}] = 1;
                    q.push({x,y1});
                }
        }
    }
    cout << "NO";
}

Compilation message (stderr)

Main.cpp:87:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   87 | main()
      | ^~~~
Main.cpp: In function 'int main()':
Main.cpp:92:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   92 |         freopen(name ".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:93:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   93 |         freopen(name ".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 0: 0 / 0
• Subtask 1: 14 / 14
• Subtask 2: 0 / 21
• Subtask 3: 0 / 9
• Subtask 4: 0 / 29
• Subtask 5: 0 / 27