Div2 250 OnTheFarmDivTwo
問題
鶴亀算を解け.
コード
#include <vector> using namespace std; class OnTheFarmDivTwo { public: vector<int> animals(int heads, int legs) { vector<int> ret(2); ret[1] = legs / 2 - heads; ret[0] = heads - ret[1]; if( (legs & 1) || ret[0] < 0 || ret[1] < 0 ) ret.clear(); return ret; } };