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题目连接:点击打开链接
解题思路:
简单暴力
完整代码:
#include <iostream> #include <cstdio> #include <algorithm> #include <cstring> #include <set> using namespace std; int n; int a[300]; bool check(int key) { set<int> s; s.clear(); for(int i = 1 ; i < key ; i ++) { if(key % i == 0) s.insert(i); } set<int>::iterator it; int sum = 0; for(it = s.begin() ; it != s.end() ; it++) { sum += *it; } if(sum == key) return true; else return false; } int main() { #ifdef DoubleQ freopen("in.txt" , "r" , stdin); #endif // DoubleQ while(cin >> n) { int a[1001]; int cnt = 0; for(int i = 1 ; i <= n ; i ++) { if(check(i)) { a[cnt++] = i; } } for(int i = 0 ; i < cnt ; i ++) printf("%d%s" , a[i] , i == cnt - 1 ? "\n" : " "); } }
解题思路:
JAVA大法好
完整代码:
import java.math.BigInteger; import java.io.*; import java.util.Scanner; public class Main { public static void main(String[] argvs){ Scanner cin = new Scanner(System.in); String a; int n; while(cin.hasNext()){ a = cin.next(); n = cin.nextInt(); BigInteger sum = new BigInteger("0"); for(int i = 1; i <= n ; i ++){ String temp = ""; for(int j = 1 ; j <= i ; j ++){ temp += a; } BigInteger k = new BigInteger(temp); sum = sum.add(k); } System.out.println(sum); } } }
解题思路:
排序
完整代码:
#include <iostream> #include <cstdio> #include <algorithm> #include <cstring> using namespace std; int n; int a[300]; int main() { #ifdef DoubleQ freopen("in.txt" , "r" , stdin); #endif // DoubleQ while(cin >> n) { for(int i = 0 ; i < n ; i ++) cin >> a[i]; int x; cin >> x; int flag = 0; for(int i = 0 ; i < n ; i ++) { if(a[i] == x) { cout << i << endl; flag = 1; break; } } if(!flag) cout << "-1" << endl; } }
解题思路:
暴力
完整代码:
#include <iostream> #include <cstdio> #include <algorithm> #include <cstring> #include <set> using namespace std; const int INF = 1000000000; int n; int a[30]; int main() { #ifdef DoubleQ freopen("in.txt" , "r" , stdin); #endif // DoubleQ while(cin >> n) { int maxx = -INF , minn = INF , maxpos , minpos; for(int i = 0 ; i < n ; i ++) { cin >> a[i]; if(a[i] > maxx) { maxx = a[i]; maxpos = i; } if(a[i] < minn) { minn = a[i]; minpos = i; } } swap(a[maxpos] , a[minpos]); for(int i = 0 ; i < n ; i ++) printf("%d%s" , a[i] , i == n - 1 ? "\n" : " "); } }
解题思路:
排序
完整代码:
#include <functional> #include <algorithm> #include <iostream> #include <fstream> #include <sstream> #include <iomanip> #include <numeric> #include <cstring> #include <climits> #include <cassert> #include <complex> #include <cstdio> #include <string> #include <vector> #include <bitset> #include <queue> #include <stack> #include <cmath> #include <ctime> #include <list> #include <set> #include <map> using namespace std; #pragma comment(linker, "/STACK:102400000,102400000") typedef long long LL; typedef double DB; typedef unsigned uint; typedef unsigned long long uLL; /** Constant List .. **/ //{ const int MOD = int(1e9)+7; const int INF = 0x3f3f3f3f; const LL INFF = 0x3f3f3f3f3f3f3f3fLL; const DB EPS = 1e-9; const DB OO = 1e20; const DB PI = acos(-1.0); //M_PI; bool cmp(char a , char b) { return a < b; } char a[1000001]; int main() { #ifdef DoubleQ freopen("in.txt","r",stdin); #endif string s; while(cin >> s) { int len = s.length(); for(int i = 0 ; i < len ; i ++) a[i] = s[i]; a[len] = '\0'; sort(a, a + len , cmp); for(int i = 0 ; i < len ;i ++) cout << a[i]; cout << endl; } }
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原文地址:http://blog.csdn.net/u013447865/article/details/44886889