123
user_8384735
c_cpp
2 years ago
264 B
7
Indexable
#include<iostream> using namespace std; int n, l, x; int main(){ cin >> n >> l; int _2 = l / 2 + (l & 1); while (n--){ cin >> x; if (x == 1) _2 -= _2 > 0; else if (x == 2 && _2 >= 2) _2 -= 2; else _2--; } cout << (_2 < 0 ? "No": "Yes"); }
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