oj.uz

Submission #904313

# Submission time Handle Problem Language Result Execution time Memory
904313 2024-01-12T03:22:51 Z shezitt Land of the Rainbow Gold (APIO17_rainbow) C++14
23 / 100
 3000 ms 15452 KB 
#include<bits/stdc++.h>

using namespace std;

using ll = long long;
#define ii pair<int,int>
#define dbg(x) cerr << #x << ": " << x << endl
#define raya cerr << "=================" << endl
#define pb push_back

const int N = 2e5+5;
vector<vector<int>> grid;
int rows, cols;

map<char,ii> to = {{'N', {-1, 0}}, {'S', {1, 0}}, {'W', {0, -1}}, {'E', {0, 1}}};

int arriba[N], abajo[N], ambos[N];

set<ii> nodes;
set<pair<ii,ii>> edges;

vector<ii> getNodes(int row, int col){
    vector<ii> res;
    res.pb({row, col});
    res.pb({row+1, col});
    res.pb({row, col+1});
    res.pb({row+1, col+1});
    return res;
}

void insertNodes(int row, int col){
    nodes.insert({row, col});
    nodes.insert({row+1, col});
    nodes.insert({row, col+1});
    nodes.insert({row+1, col+1});

    edges.insert({{row, col}, {row+1, col}});
    edges.insert({{row, col}, {row, col+1}});
    edges.insert({{row+1, col}, {row+1, col+1}});
    edges.insert({{row, col+1}, {row+1, col+1}});
    
}

set<ii> nodosSnake;

void init(int R, int C, int sr, int sc, int M, char *s){
    rows = R;
    cols = C;
    sr--, sc--;

    if(rows == 2){
        grid.assign(3, vector<int>(cols+1, 0));
    } else if(rows*cols <= 1e7) {
        grid.assign(rows+1, vector<int>(cols+1, 0));
    }

    if(rows*cols <= 1e7){
        ii pos = {sr, sc};
        grid[pos.first][pos.second] = 1;
        for(int i=0; i<M; ++i){
            char c = s[i];
            pos.first += to[c].first;
            pos.second += to[c].second;
            grid[pos.first][pos.second] = 1;
        }
    }

    if(rows == 2){
        // subtask 2
        arriba[0] = (grid[0][0] == 0);
        abajo[0] = (grid[1][0] == 0);
        for(int i=1; i<cols; ++i){
            arriba[i] = (grid[0][i-1] == 1 && grid[0][i] == 0);
            abajo[i] = (grid[1][i-1] == 1 && grid[1][i] == 0);
        }
        for(int i=1; i<cols; ++i){
            arriba[i] += arriba[i-1];
            abajo[i] += abajo[i-1];
        }
        // ambos
        ambos[0] = (grid[0][0] == 0 && grid[1][0] == 0);
        for(int i=1; i<cols; ++i){
            if(grid[0][i-1] == 1 or grid[1][i-1] == 1){
                ambos[i] = (grid[0][i] == 0 && grid[1][i] == 0);
            }
        }
        for(int i=1; i<cols; ++i){
            ambos[i] += ambos[i-1];
        }
    }

    // subtask 3
    ii pos = {sr, sc};
    nodosSnake.insert({sr, sc});
    for(int i=0; i<M; ++i){
        char c = s[i];
        pos.first += to[c].first;
        pos.second += to[c].second;
        nodosSnake.insert(pos);
    }

}

void clear(){
    for(int i=0; i<rows; ++i){
        for(int j=0; j<cols; ++j){
            if(grid[i][j] == 2) grid[i][j] = 0;
        }
    }
}

vector<ii> mov = {{1, 0}, {-1, 0}, {0, 1}, {0, -1}};

void dfs(int i, int j, int ar, int ac, int br, int bc){
    for(auto tmp : mov){
        int ni = i + tmp.first;
        int nj = j + tmp.second;
        if(ni >= ar && ni <= br && nj >= ac && nj <= bc && grid[ni][nj] == 0){
            grid[ni][nj] = 2;
            dfs(ni, nj, ar, ac, br, bc);
        }
    }
}

int colour(int ar, int ac, int br, int bc){

    ar--, ac--;
    br--, bc--;

    if(rows == 2){
        // subtask 2
        if(ar+1 == br){
            // ambos
            int res = arriba[bc] + abajo[bc];
            int quitar = ambos[bc];
            if(ac > 0){
                res -= arriba[ac-1] - (grid[0][ac-1] == 0 && grid[0][ac] == 0);
                res -= abajo[ac-1] - (grid[1][ac-1] == 0 && grid[1][ac] == 0);
                quitar -= ambos[ac-1] - (grid[0][ac-1] == 0 && grid[0][ac] == 0 && grid[1][ac-1] == 0 && grid[1][ac] == 0);
            }
            res -= quitar;
            return res;
        }
        // arriba
        if(ar == 0){
            int res = arriba[bc];
            if(ac > 0){
                res -= arriba[ac-1] - (grid[0][ac-1] == 0 && grid[0][ac] == 0);
            }
            return res;
        }
        // abajo
        assert(ar == 1);
        int res = abajo[bc];
        if(ac > 0){
            res -= abajo[ac-1] - (grid[1][ac-1] == 0 && grid[1][ac] == 0);
        }
        return res;
    }

    if(rows*cols <= 1e17){
        // subtask 1
        int ans = 0;
        for(int i=ar; i<=br; ++i){
            for(int j=ac; j<=bc; ++j){
                if(grid[i][j] == 0){
                    ans++;
                    grid[i][j] = 2;
                    dfs(i, j, ar, ac, br, bc);
                }
            }
        }
        clear();
        return ans;
    }

    // only one query (subtask 3)
    int tamSnake = 0;
    for(auto node : nodosSnake){
        if(node.first >= ar && node.first <= br && node.second >= ac && node.second <= bc){
            tamSnake++;
            insertNodes(node.first, node.second);
        }
    }

    bool ok = 0;
    for(int col=ac; col<=bc; ++col){
        vector<ii> tmp = getNodes(ar-1, col);
        for(auto node : tmp){
            ok |= nodes.count(node);
        }
        tmp = getNodes(br+1, col);
        for(auto node : tmp){
            ok |= nodes.count(node);
        }
    }

    for(int row=ar; row<=br; ++row){
        vector<ii> tmp = getNodes(row, ac-1);
        for(auto node : tmp){
            ok |= nodes.count(node);
        }
        tmp = getNodes(row, bc+1);
        for(auto node : tmp){
            ok |= nodes.count(node);
        }
    }

    if(ok){
        // include the border
        for(int col=ac; col<=bc; ++col){
            insertNodes(ar-1, col);
            insertNodes(br+1, col);
        }
        for(int row=ar; row<=br; ++row){
            insertNodes(row, ac-1);
            insertNodes(row, bc+1);
        }
    }

    int ans = 2 - (int)nodes.size() + (int)edges.size() - ok;
    // quitar snake size
    ans -= tamSnake;
    // quitar border size si es que fue incluido
    if(ok){
        ans -= (br-ar+1) * 2 + (bc-ac+1) * 2;
    }

    return ans;

    
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 344 KB Output is correct
2 Correct 7 ms 348 KB Output is correct
3 Correct 12 ms 604 KB Output is correct
4 Correct 17 ms 860 KB Output is correct
5 Correct 10 ms 348 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 11 ms 596 KB Output is correct
12 Correct 10 ms 348 KB Output is correct
13 Correct 8 ms 348 KB Output is correct
14 Correct 6 ms 348 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 1 ms 2392 KB Output is correct
17 Correct 1 ms 2392 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 53 ms 8520 KB Output is correct
4 Correct 66 ms 10448 KB Output is correct
5 Correct 60 ms 10556 KB Output is correct
6 Correct 64 ms 9728 KB Output is correct
7 Correct 53 ms 9292 KB Output is correct
8 Correct 43 ms 5920 KB Output is correct
9 Correct 61 ms 10612 KB Output is correct
10 Correct 63 ms 10564 KB Output is correct
11 Correct 59 ms 9788 KB Output is correct
12 Correct 62 ms 10264 KB Output is correct
13 Correct 54 ms 10556 KB Output is correct
14 Correct 53 ms 10604 KB Output is correct
15 Correct 60 ms 9768 KB Output is correct
16 Correct 55 ms 9028 KB Output is correct

Subtask #3
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Runtime error 18 ms 10124 KB Execution killed with signal 11
3 Halted 0 ms 0 KB -

Subtask #4
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 344 KB Output is correct
2 Correct 7 ms 348 KB Output is correct
3 Correct 12 ms 604 KB Output is correct
4 Correct 17 ms 860 KB Output is correct
5 Correct 10 ms 348 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 11 ms 596 KB Output is correct
12 Correct 10 ms 348 KB Output is correct
13 Correct 8 ms 348 KB Output is correct
14 Correct 6 ms 348 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 1 ms 2392 KB Output is correct
17 Correct 1 ms 2392 KB Output is correct
18 Execution timed out 3045 ms 15452 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 344 KB Output is correct
2 Correct 7 ms 348 KB Output is correct
3 Correct 12 ms 604 KB Output is correct
4 Correct 17 ms 860 KB Output is correct
5 Correct 10 ms 348 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 11 ms 596 KB Output is correct
12 Correct 10 ms 348 KB Output is correct
13 Correct 8 ms 348 KB Output is correct
14 Correct 6 ms 348 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 1 ms 2392 KB Output is correct
17 Correct 1 ms 2392 KB Output is correct
18 Execution timed out 3045 ms 15452 KB Time limit exceeded
19 Halted 0 ms 0 KB -