겉넓이 구하기

#include <iostream> #include <vector> int wid, hei, result; std::vector<std::vector<int> > paper; void output() { std::cout << result; } void solution() { int und, fnb, lnr; und = fnb = lnr = 0; // up & down und = wid * hei * 2; // fnb & back for(int i = 1 ; i <= wid ; ++i) for(int j = 1 ; j <= hei + 1 ; ++j) fnb += std::abs(paper[j][i] - paper[j - 1][i]); //left & right for(int i = 1 ; i <= hei ; ++i) for(int j = 1 ; j <= wid + 1 ; ++j) lnr += std::abs(paper[i][j] - paper[i][j - 1]); result = und + fnb + lnr; // std::cout << "all : " << und + fnb + lnr << std::endl; } void input() { std::cin >> wid >> hei; paper = std::vector(hei + 2, std::vector(wid + 2, 0)); for(int i = 1 ; i <= hei ; ++i) for(int j = 1 ; j <= wid ; ++j) std::cin >> paper[i][j]; } void preset() { std::ios_base::sync_with_stdio(false); std::cin.tie(0); std::cout.tie(0); } int main() { preset(); input(); solution(); output(); }