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Submission #904347

# Submission time Handle Problem Language Result Execution time Memory
904347 2024-01-12T04:31:38 Z vjudge1 Land of the Rainbow Gold (APIO17_rainbow) C++17
23 / 100
 3000 ms 103780 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 <= 1e6) {
        grid.assign(rows+1, vector<int>(cols+1, 0));
    }
 
    if(rows*cols <= 1e6){
        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 <= 1e6){
        // 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();
    // 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 348 KB Output is correct
2 Correct 6 ms 348 KB Output is correct
3 Correct 11 ms 604 KB Output is correct
4 Correct 12 ms 604 KB Output is correct
5 Correct 7 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 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 11 ms 604 KB Output is correct
12 Correct 9 ms 344 KB Output is correct
13 Correct 8 ms 348 KB Output is correct
14 Correct 10 ms 552 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 62 ms 8516 KB Output is correct
4 Correct 59 ms 10556 KB Output is correct
5 Correct 58 ms 10476 KB Output is correct
6 Correct 59 ms 9640 KB Output is correct
7 Correct 59 ms 9284 KB Output is correct
8 Correct 59 ms 6244 KB Output is correct
9 Correct 67 ms 10684 KB Output is correct
10 Correct 68 ms 10560 KB Output is correct
11 Correct 62 ms 9768 KB Output is correct
12 Correct 56 ms 10068 KB Output is correct
13 Correct 52 ms 10556 KB Output is correct
14 Correct 59 ms 10560 KB Output is correct
15 Correct 62 ms 9728 KB Output is correct
16 Correct 60 ms 9020 KB Output is correct

Subtask #3
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Incorrect 655 ms 103780 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 6 ms 348 KB Output is correct
3 Correct 11 ms 604 KB Output is correct
4 Correct 12 ms 604 KB Output is correct
5 Correct 7 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 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 11 ms 604 KB Output is correct
12 Correct 9 ms 344 KB Output is correct
13 Correct 8 ms 348 KB Output is correct
14 Correct 10 ms 552 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Execution timed out 3011 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 348 KB Output is correct
2 Correct 6 ms 348 KB Output is correct
3 Correct 11 ms 604 KB Output is correct
4 Correct 12 ms 604 KB Output is correct
5 Correct 7 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 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 11 ms 604 KB Output is correct
12 Correct 9 ms 344 KB Output is correct
13 Correct 8 ms 348 KB Output is correct
14 Correct 10 ms 552 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Execution timed out 3011 ms 15452 KB Time limit exceeded
19 Halted 0 ms 0 KB -