問題：B - Picture Frame #include <iostream> #include <string> using namespace std; #define REP(i, n) for (int i = 0; i < (n); ++i) int main(void) { int h, w; string a[100], line = ""; cin.tie(0); ios::sync_with_stdio(false); cin >> h >> w; REP(i, h) { cin ></string></iostream>…