Submission #31525792

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for(int i = 0; i < (n); ++i)

std::vector<std::string> split(const std::string& text, const char delim);

using ll = long long int;
using llu = unsigned long long int;

int main(){
    string buffer;
    getline(cin, buffer);
    auto size_list = split(buffer, ' ');
    const int H = stoi(size_list[0]);
    const int W = stoi(size_list[1]);

    vector<vector<int>> table;
    table.resize(H+2);
    for(auto& line : table){
        line.resize(W+2, 0);
    }

    for(int w = 0; w < W + 2; ++w){
        table[0][w] = -1;
        table[H+1][w] = -1;
    }

    for(int h = 0; h < H + 2; ++h){
        table[h][0] = -1;
        table[h][W+1] = -1;
    }

    getline(cin, buffer);
    auto point_list = split(buffer, ' ');
    const int R = stoi(point_list[0]);
    const int C = stoi(point_list[1]);

    int result = 0;
    if(table[R-1][C] == 0){
        ++result;
    }
    if(table[R+1][C] == 0){
        ++result;
    }
    if(table[R][C-1] == 0){
        ++result;
    }
    if(table[R][C+1] == 0){
        ++result;
    }
    cout << result << endl;

    return 0;
}

std::vector<std::string> split(const std::string& text, const char delim){
    std::vector<std::string> item_list;
    std::stringstream ss(text);
    std::string buffer;

    const size_t NUM_ITEM = std::count(text.begin(), text.end(), delim);
    item_list.reserve(NUM_ITEM + 1);

    while ( std::getline(ss, buffer, delim) ) {
        if (!buffer.empty()) {
                item_list.emplace_back(buffer);
        }
    }

    return item_list;
}

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