diff options
Diffstat (limited to 'works/life/2020-algorithm-contest/code/4.cpp')
| -rw-r--r-- | works/life/2020-algorithm-contest/code/4.cpp | 71 | 
1 files changed, 0 insertions, 71 deletions
| diff --git a/works/life/2020-algorithm-contest/code/4.cpp b/works/life/2020-algorithm-contest/code/4.cpp deleted file mode 100644 index 4ee94cb..0000000 --- a/works/life/2020-algorithm-contest/code/4.cpp +++ /dev/null @@ -1,71 +0,0 @@ -#include <iostream> -#include <vector> - -int calc(std::vector<std::vector<int>> &obstacleGrid) -{ - -    int R = obstacleGrid.size(); -    int C = obstacleGrid[0].size(); - -    // If the starting cell has an obstacle, then simply return as there would be -    // no paths to the destination. -    if (obstacleGrid[0][0] == 1) -    { -        return 0; -    } - -    // Number of ways of reaching the starting cell = 1. -    obstacleGrid[0][0] = 1; - -    // Filling the values for the first column -    for (int i = 1; i < R; i++) -    { -        obstacleGrid[i][0] = (obstacleGrid[i][0] == 0 && obstacleGrid[i - 1][0] == 1) ? 1 : 0; -    } - -    // Filling the values for the first row -    for (int i = 1; i < C; i++) -    { -        obstacleGrid[0][i] = (obstacleGrid[0][i] == 0 && obstacleGrid[0][i - 1] == 1) ? 1 : 0; -    } - -    // Starting from cell(1,1) fill up the values -    // No. of ways of reaching cell[i][j] = cell[i - 1][j] + cell[i][j - 1] -    // i.e. From above and left. -    for (int i = 1; i < R; i++) -    { -        for (int j = 1; j < C; j++) -        { -            if (obstacleGrid[i][j] == 0) -            { -                obstacleGrid[i][j] = obstacleGrid[i - 1][j] + obstacleGrid[i][j - 1]; -            } -            else -            { -                obstacleGrid[i][j] = 0; -            } -        } -    } - -    // Return value stored in rightmost bottommost cell. That is the destination. -    return obstacleGrid[R - 1][C - 1]; -} - -int main() -{ -    int row, column, bs; -    std::cin >> row >> column >> bs; - -    std::vector<std::vector<int>> grid(row, std::vector<int>(column, 0)); - -    for (int i = 0; i < bs; i++) -    { -        int r, c; -        std::cin >> r >> c; -        grid[r][c] = 1; -    } - -    std::cout << calc(grid); - -    return 0; -} | 
