Codeforces Round #421 A
题意:给你一本c页的数,第一天读v0页,以后每天读 的页数比前一天多a页(v0+a,v0+2a,v0+3a), 但是每天读的页数不超过v1页,且从第二天起,每天要从前一天的后 l 页读起(也就是每天都要将前一天的后l页再读一遍),求多少天可以读完这本数
思路:xjb模拟
AC代码:
#include "iostream" #include "string.h" #include "stack" #include "queue" #include "string" #include "vector" #include "set" #include "map" #include "algorithm" #include "stdio.h" #include "math.h" #define ll long long #define bug(x) cout<<x<<" "<<"UUUUU"<<endl; #define mem(a) memset(a,0,sizeof(a)) using namespace std; const int N=1e5+100; int main(){ int c,v0,v1,a,l; cin>>c>>v0>>v1>>a>>l; int ans=0,s=0,k=v0; while(c>s){ if(ans!=0) s-=l; ans++; s+=k; k+=a; if(k>v1)k=v1; } cout<<ans<<endl; return 0; } /* 5 5 10 5 4 12 4 12 4 1 15 1 100 0 0 */