oj.uz

Submission #1086050

# Submission time Handle Problem Language Result Execution time Memory
1086050 2024-09-09T11:49:39 Z underwaterkillerwhale Land of the Rainbow Gold (APIO17_rainbow) C++17
23 / 100
 3000 ms 110268 KB 
#include <bits/stdc++.h>
#define ll              long long
#define pii             pair<int,int>
#define pll             pair<ll,ll>
#define rep(i,m,n)      for(int i=(m); i<=(n); i++)
#define reb(i,m,n)      for(int i=(m); i>=(n); i--)
#define iter(id, v)     for(auto id : v)
#define fs              first
#define se              second
#define MP              make_pair
#define pb              push_back
#define bit(msk, i)     ((msk >> i) & 1)
#define SZ(v)           (ll)v.size()
#define ALL(v)          v.begin(),v.end()

using namespace std;

mt19937_64 rd(chrono :: steady_clock :: now ().time_since_epoch().count());
ll Rand (ll l, ll r) { return uniform_int_distribution<ll> (l, r) (rd); }

const int N = 2e5 + 7;
const ll INF = 1e18;
const ll BASE = 137;
const int szBL = 350;

int dx[4] = {1, -1, 0, 0};
int dy[4] = {0, 0, 1, -1};

int dxx[3] = {0, 1, 1};
int dyy[3] = {1,  1, 0};

int dxxx[3] = {0, -1, -1};
int dyyy[3] = {1,  -1, 0};

int n, m, Sr, Sc, nmove, Q;
vector<char> moves;

bool sub1c, sub2c, sub3c;

namespace sub1 {
    const int N1 = 50 + 7;
    int dd[N1][N1];

    void init () {
        int u = Sr, v = Sc;
        dd[u][v] = -1;
        iter (&c, moves) {
            if (c == 'N') dd[--u][v] = -1;
            else if (c == 'S') dd[++u][v] = -1;
            else if (c == 'W') dd[u][--v] = -1;
            else dd[u][++v] =-1;
        }
    }

    bool inside (int u, int v, int x, int y, int u1, int v1) {
        return u >= x && u <= u1 && v >= y && v <= v1;
    }

    int solution (int x, int y, int u, int v) {
        rep (i, 1, n)
        rep (j, 1, m) if (dd[i][j] != -1) dd[i][j] = 0;
//        rep (i, 1, n) rep (j, 1, m) cout << dd[i][j] <<" \n"[j == m];
        auto flooding = [&] (int u1, int v1, int color) {
            static queue<pii> Q;
            Q.push({u1, v1});
            dd[u1][v1] = color;
            while (!Q.empty()) {
                pii cur = Q.front();
                Q.pop();
                rep (k, 0, 3)  {
                    int ni = cur.fs + dx[k], nj = cur.se + dy[k];
                    if (inside(ni, nj, x, y, u, v) && dd[ni][nj] != -1 && dd[ni][nj] == 0) {
                        dd[ni][nj] = color;
                        Q.push({ni, nj});
                    }
                }
            }
        };

        int num_cpn = 0;
        rep (i, 1, n)
        rep (j, 1, m) {
            if (dd[i][j] == 0 && inside(i, j, x, y, u, v)) {
                ++num_cpn;
                flooding(i, j, num_cpn);
            }
        }
//        cout <<"hih\n";
        return num_cpn;
    }
}

namespace sub2 {
    int dd[5][N], pre[5][N];

    void init () {
        int u = Sr, v = Sc;
        dd[u][v] = -1;
        iter (&c, moves) {
            if (c == 'N') dd[--u][v] = -1;
            else if (c == 'S') dd[++u][v] = -1;
            else if (c == 'W') dd[u][--v] = -1;
            else dd[u][++v] =-1;
        }
        rep (i, 2, m) {
            pre[3][i] = pre[3][i - 1] + (dd[1][i] == dd[2][i] && dd[1][i] == -1 && dd[1][i - 1] * dd[2][i - 1] == 0);
            pre[2][i] = pre[2][i - 1] + (dd[2][i] == -1 && dd[2][i - 1] == 0);
            pre[1][i] = pre[1][i - 1] + (dd[1][i] == -1 && dd[1][i - 1] == 0);
        }
    }

    int solution (int x, int y, int u, int v) {
        if (x != u) {
            return pre[3][v] - pre[3][y] + (dd[1][v] == 0 || dd[2][v] == 0);
        }
        else {
            return pre[x][v] - pre[x][y] + (dd[x][v] == 0);
        }
    }

}

namespace sub3 {
    map<pii, int> dd, ddE;
    map<int, int> ddV;
    int numn = 0, numVer = 0, num_edges = 0;

    vector<pii> nodes;

    struct DSU {
        vector<int> lab, sz;

        void init () {
            lab.resize(numn + 1);
            sz.resize(numn + 1);
            rep (i, 1, numn) lab[i] = i, sz[i] = 1;
        }

        int Find (int u) {
            return u == lab[u] ? u : lab[u] = Find(lab[u]);
        }

        void Join (int u, int v) {
            u = Find(u);
            v = Find(v);
            if (u == v) return;
            if (sz[u] < sz[v]) swap(u, v);
            sz[u] += sz[v];
            lab[v] = u;
        }
    }DSU;

    bool inside (int u, int v, int x, int y, int u1, int v1) {
        return u >= x && u <= u1 && v >= y && v <= v1;
    }


    void init (int x, int y, int u1, int v1) {
        numn = 0;
        int u = Sr, v = Sc;
        if (inside(u, v, x - 1, y - 1, u1 + 1, v1 + 1)) {
            dd[MP(u, v)] = ++numn, nodes.pb({u, v});
        }
        iter (&c, moves) {
            if (c == 'N') --u;
            else if (c == 'S') ++u;
            else if (c == 'W') --v;
            else ++v;
            if (inside(u, v, x - 1, y - 1, u1 + 1, v1 + 1) && dd[MP(u, v)] == 0) {
                dd[MP(u, v)] = ++numn, nodes.pb({u, v});
            }
        }
    }

    void add_edge (int u, int v) {
        u = DSU.Find(u);
        v = DSU.Find(v);
        if (u == v) return;
        if (u > v) swap(u, v);
        if (ddE[MP(u, v)] == 0) ++num_edges;
        ddE[MP(u, v)] = 1;
    }

    int solution (int x, int y, int u, int v) {
        init(x, y, u, v);
        rep (i, y - 1, v + 1) {
            if (dd[{x - 1, i}] == 0) dd[{x - 1, i}] = ++numn, nodes.pb({x - 1, i});
            if (dd[{u + 1, i}] == 0) dd[{u + 1, i}] = ++numn, nodes.pb({u + 1, i});
        }
        rep (i, x - 1, u + 1) {
            if (dd[{i, y - 1}] == 0) dd[{i, y - 1}] = ++numn, nodes.pb({i, y - 1});
            if (dd[{i, v + 1}] == 0) dd[{i, v + 1}] = ++numn, nodes.pb({i, v + 1});
        }

        DSU.init();
        iter (&id, nodes) {
            pii cur = id;
            bool ok = 1;
            rep (k, 0, 2) {
                int ni = id.fs + dxx[k], nj = id.se + dyy[k];
                ok &= (dd[MP(ni, nj)] > 0);
            }
            if (ok) {
                 rep (k, 0, 2) {
                    int ni = id.fs + dxx[k], nj = id.se + dyy[k];
                    DSU.Join(dd[id], dd[MP(ni, nj)]);
                }
            }
        }

        iter (&id, nodes) {
            pii cur = id;
            rep (k, 0, 3)  {
                int ni = cur.fs + dx[k], nj = cur.se + dy[k];
                if (dd[MP(ni, nj)]) {
                    add_edge(dd[cur], dd[MP(ni, nj)]);
                }
            }
            int num = 0;
            rep (k, 0, 2) {
                int ni = cur.fs + dxx[k], nj = cur.se + dyy[k];
                num += (dd[MP(ni, nj)] > 0);
            }
            if (num == 2 && dd[MP(cur.fs + 1, cur.se + 1)]) {
                add_edge(dd[cur], dd[MP(cur.fs + 1, cur.se + 1)]);
            }
            num = 0;
            rep (k, 0, 2) {
                int ni = cur.fs + dxxx[k], nj = cur.se + dyyy[k];
                num += (dd[MP(ni, nj)] > 0);
            }
            if (num == 2 && dd[MP(cur.fs - 1, cur.se - 1)]) {
                add_edge(dd[cur], dd[MP(cur.fs - 1, cur.se - 1)]);
            }

        }

        iter (&id, nodes) {
            int u = DSU.Find(dd[id]);
            if (ddV[u] == 0) ++numVer;
            ddV[u] = 1;
        }

//        cout<<"\n";
//        rep (i, 1, n + 1)
//        rep (j, 1, m + 1) cout << DSU.Find(dd[MP(i, j)]) <<"  "<<" \n"[j == m + 1];

//        cout << num_edges <<" "<< numVer <<"\n";
        return num_edges - numVer + 1;
    }

}

int colour (int x, int y, int u, int v) {
    if (sub1c)
        return sub1 :: solution(x, y, u, v);
    else if (sub2c)
        return sub2 :: solution(x, y, u, v);
    else
        return sub3 :: solution(x, y, u, v);
}

void init (int _n, int _m, int _Sr, int _Sc, int _nmove, char _moves[]) {
    n = _n;
    m = _m;
    Sr = _Sr;
    Sc = _Sc;
    nmove = _nmove;
    rep (i, 0, nmove - 1) moves.pb(_moves[i]);
    if (n <= 50 && m <= 50) {
        sub1 :: init();
        sub1c = 1;
    }
    else if (n == 2) {
        sub2 :: init();
        sub2c = 1;
    }
    else {
        sub3c = 1;
    }
}

void solution() {
    cin >> n >> m >> nmove >> Q;
    cin >> Sr >> Sc;
    string S;
    cin >> S;
    rep (i, 0, nmove - 1) moves.pb(S[i]);
    if (n <= 50 && m <= 50) {
        sub1 :: init();
        sub1c = 1;
    }
    else if (n == 2) {
        sub2 :: init();
        sub2c = 1;
    }
    else {
        sub3c = 1;
    }
    rep (i, 1, Q) {
        int x, y, u, v;
        cin >> x >> y >> u >> v;
        cout << colour (x, y, u, v) <<"\n";
    }
}

#define file(name) freopen(name".inp","r",stdin); \
freopen(name".out","w",stdout);
//int main () {
////    file("c");
//    ios_base :: sync_with_stdio(false); cin.tie(0); cout.tie(0);
//    int num_Test = 1;
////    cin >> num_Test;
//    while (num_Test--)
//        solution();
//}
/*
no bug +6
6 4 9 1
3 3
NWESSWEWS
5 3 6 4

*/

Compilation message

rainbow.cpp: In function 'int sub3::solution(int, int, int, int)':
rainbow.cpp:197:17: warning: variable 'cur' set but not used [-Wunused-but-set-variable]
  197 |             pii cur = id;
      |                 ^~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 348 KB Output is correct
2 Correct 8 ms 500 KB Output is correct
3 Correct 13 ms 348 KB Output is correct
4 Correct 13 ms 504 KB Output is correct
5 Correct 8 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 452 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 13 ms 348 KB Output is correct
12 Correct 11 ms 344 KB Output is correct
13 Correct 10 ms 348 KB Output is correct
14 Correct 7 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 33 ms 6580 KB Output is correct
4 Correct 36 ms 7252 KB Output is correct
5 Correct 35 ms 7252 KB Output is correct
6 Correct 36 ms 6992 KB Output is correct
7 Correct 37 ms 6992 KB Output is correct
8 Correct 34 ms 6480 KB Output is correct
9 Correct 44 ms 7248 KB Output is correct
10 Correct 37 ms 7248 KB Output is correct
11 Correct 35 ms 7040 KB Output is correct
12 Correct 41 ms 6996 KB Output is correct
13 Correct 36 ms 7348 KB Output is correct
14 Correct 30 ms 7260 KB Output is correct
15 Correct 46 ms 6924 KB Output is correct
16 Correct 36 ms 6848 KB Output is correct

Subtask #3
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Incorrect 978 ms 110268 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 348 KB Output is correct
2 Correct 8 ms 500 KB Output is correct
3 Correct 13 ms 348 KB Output is correct
4 Correct 13 ms 504 KB Output is correct
5 Correct 8 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 452 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 13 ms 348 KB Output is correct
12 Correct 11 ms 344 KB Output is correct
13 Correct 10 ms 348 KB Output is correct
14 Correct 7 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Execution timed out 3039 ms 20032 KB Time limit exceeded
19 Halted 0 ms 0 KB -

Subtask #5
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 348 KB Output is correct
2 Correct 8 ms 500 KB Output is correct
3 Correct 13 ms 348 KB Output is correct
4 Correct 13 ms 504 KB Output is correct
5 Correct 8 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 452 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 13 ms 348 KB Output is correct
12 Correct 11 ms 344 KB Output is correct
13 Correct 10 ms 348 KB Output is correct
14 Correct 7 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Execution timed out 3039 ms 20032 KB Time limit exceeded
19 Halted 0 ms 0 KB -