lightoj 1198Karate Competition

题意:双方各有n各人,每个人呢有一个技能值,每个人且只能出战一次,如果A的技能大于B的技能,A所在方得两分,A技能值等于B的话,给得一分,输了不得分,问A方最多能得多少分。

这题贪心思路很多,,,但是对的没几个,,,,wa了4发都没怎么wa明白。

对于A方的几个技能值X,,,先在B中找一个小于X的最大值,,,这种关系找完后,,,在找剩下中能打成平手的。。。

// #pragma comment(linker, "/STACK:1024000000,1024000000")
#include <iostream>
#include <algorithm>
#include <iomanip>
#include <sstream>
#include <string>
#include <stack>
#include <queue>
#include <deque>
#include <vector>
#include <map>
#include <set>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
#include <limits.h>
// #define DEBUG
#ifdef DEBUG
#define debug(...) printf( __VA_ARGS__ )
#else
#define debug(...)
#endif
#define MEM(x,y) memset(x, y,sizeof x)
using namespace std;
typedef long long LL;
typedef unsigned long long ULL;
typedef pair<int,int> ii;
const int inf = 1 << 30;
const int INF = 0x3f3f3f3f;
const int MOD = 1e9 + 7;
int n;
int A[60], B[60];
int main()
{	
	// freopen("in.txt","r",stdin);
	// freopen("out.txt","w",stdout);
	int icase = 0, t;
	cin >> t;
	while(t--){
		cin >> n;
		for (int i = 0;i < n;++i)
			cin >> A[i];
		for (int i = 0;i < n;++i)
			cin >> B[i];
		sort(A,A+n);
		sort(B,B+n);
		int sum = 0;
		for (int i = 0;i < n;++i){
			int last = -1;
			for (int j = 0;j < n;++j){
				if (B[j] == -1) continue;
				if (B[j] > A[i]) break;
				if (B[j] < A[i])
					last = j;
			}
			if (last != -1){
				A[i] = -1;
				sum += 2;
				B[last] = -1;
			}
		}
		for (int i = 0;i < n;++i){
			if (A[i] == -1) continue;
			for (int j = 0;j < n;++j){
				if (A[i] < B[j]) break;
				if (B[j] == -1) continue;
				if (A[i] == B[j]){
					B[j] = -1;
					sum += 1;
					break;
				}
			}
		}
		printf("Case %d: %d\n", ++icase, sum);
	}
	return 0;
}


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