#include <iostream> #include <vector> using namespace std; int main() { ios::sync_with_stdio(false); cin.tie(nullptr); long long h, w, n; cin >> h >> w >> n; vector<long long> O(n); for (auto& o : O) cin >> o; long long covered_area = 0, result = 0; for (int i=n-1; i>=0; i--) { auto x = O[i]; long long area = ((h/x)*x) * ((w/x)*x); result += (area-covered_area) / (x*x); covered_area = area; } if (covered_area == h*w) cout << result << '\n'; else cout << "-1\n"; return 0; }
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | #include <iostream> #include <vector> using namespace std; int main() { ios::sync_with_stdio(false); cin.tie(nullptr); long long h, w, n; cin >> h >> w >> n; vector<long long> O(n); for (auto& o : O) cin >> o; long long covered_area = 0, result = 0; for (int i=n-1; i>=0; i--) { auto x = O[i]; long long area = ((h/x)*x) * ((w/x)*x); result += (area-covered_area) / (x*x); covered_area = area; } if (covered_area == h*w) cout << result << '\n'; else cout << "-1\n"; return 0; } |