설탕배달

문제 설명 https://www.acmicpc.net/problem/2839 문제 풀이 #include #include using namespace std; int main(int argc, char** argv) { ios_base :: sync_with_stdio(false); cin.tie(0); cout.tie(0); int n; cin >> n; for (int p3=0; p3 <= 1670; ++p3) { int r = n - p3 * 3; if (r % 5 == 0) { cout << p3 + r / 5; return 0; } else if (r < 0) { cout << "-1" << endl; return 0; } } return 0; }...