A仓鼠与食堂
仓鼠与饭堂
https://ac.nowcoder.com/acm/contest/8925/A
https://ac.nowcoder.com/acm/contest/8925/A
根据题意易的出菜一份份的买的OK,并且是越贵的菜越先买,如果一开始最贵的菜就买不了,那就是不行
#include <iostream> #include <algorithm> using namespace std; int main() { int t; scanf("%d",&t); while(t--) { int n,m; scanf("%d%d",&n,&m); int a[n],i; for(i=0;i<n;i++) scanf("%d",&a[i]); sort(a,a+n); double x=m; for(i=n-1;i>=0;i--) { if(a[i]-x>0) break; else { x = x-0.7*a[i]; } } if(i==-1) printf("yes\n"); else printf("no\n"); } return 0; }
B https://ac.nowcoder.com/acm/contest/9033/B
#include <algorithm> #include <cmath> using namespace std; int main() { int n,i; scanf("%d",&n); int a[n],flag=0; for(i=0;i<n;i++) scanf("%d",&a[i]); int sum =1; for(i=0;i<n-1;i++) { if(a[i]==0) { if(a[i+1]==1) { sum++;i++; } } } printf("%d",sum); return 0; }