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题目链接:http://codeforces.com/contest/722/problem/D
1 #include <bits/stdc++.h> 2 #include <iostream> 3 #include <queue> 4 #include <stdio.h> 5 #include <string.h> 6 #include <algorithm> 7 #include <string> 8 #include <math.h> 9 #include <set> 10 #include <map> 11 #define mod 1000000007 12 #define MAXN 100+10 13 #define INF 1000000000 14 #define eps 10e-6 15 #define ll long long 16 using namespace std; 17 18 bool cmp(int a, int b) 19 { 20 return a > b; 21 } 22 23 //****************************************************************************** 24 25 int main(void) 26 { 27 //std::ios::sync_with_stdio(false), cin.tie(0), cout.tie(0); 28 int n; 29 set<int>st; 30 cin >> n; 31 for(int i=0; i<n; i++) 32 { 33 int x; 34 cin >> x; 35 st.insert(x); 36 } 37 while(1) 38 { 39 int x=*st.rbegin(), i; 40 for(i=x; i&&st.count(i); i/=2); //***st.count(x)查找st里i出现的次数 41 if(!i) 42 { 43 break; 44 } 45 st.erase(x); 46 st.insert(i); 47 } 48 for(int it : st) //***类似java里面的加强for循环 49 { 50 printf("%d ", it); 51 } 52 printf("\n"); 53 return 0; 54 }
Intel Code Challenge Elimination Round (Div.1 + Div.2, combined)(set容器里count函数以及加强for循环)
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原文地址:http://www.cnblogs.com/geloutingyu/p/5928328.html