链接:http://acm.hdu.edu.cn/showproblem.php?pid=5878
解法:先保存,再二分查询~具体http://blog.csdn.net/coder_xia/article/details/6707600
#include<stdio.h> //#include<bits/stdc++.h> #include<string.h> #include<iostream> #include<math.h> #include<sstream> #include<set> #include<queue> #include<map> #include<vector> #include<algorithm> #include<limits.h> #define MAXN (100000+10) #define MAXM (100000) #define inf 0x3fffffff #define INF 0x3f3f3f3f #define lson l,m,rt<<1 #define rson m+1,r,rt<<1|1 #define LL long long #define ULL unsigned long long using namespace std; long long data[10000]; long long index = 0; void get(int n) { data[0] = 1; long long T2 = 0; long long T3 = 0; long long T5 = 0; long long T7 = 0; // long long index = 0; while (index < n) { index++; long long d1=min(data[T2] * 2, data[T3] * 3); long long d2=min(data[T5] * 5, data[T7] * 7); long long d = min(d1,d2); data[index] = d; while (data[T2] * 2 == data[index]) T2++; while (data[T3] * 3 == data[index]) T3++; while (data[T5] * 5 == data[index]) T5++; while (data[T7] * 7 == data[index]) T7++; } } int main() { int i,n; get(7000); // cout<<data[7000]<<endl; // cout<<index<<endl; int t; while(~scanf("%d",&t)) { } while(t--) { int m; scanf("%d",&m); int pos=lower_bound(data,data+index,m)-data; printf("%lld ",data[pos]); } return 0; }