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BestCoder Round #41 -- (A,B)

时间:2015-05-17 09:24:52      阅读:159      评论:0      收藏:0      [点我收藏+]

标签:acm   hdu   bestcoder   bc   


题目传送:BestCoder Round #41



A、ZCC loves straight flush


思路:简单题,不过刚开始没看清题,wa了好几次,然后才发现输入不连续也可以,就是说每个同一花色的牌都可以放在一块,不用在意输入顺序,感觉这里题目应该说清楚点好些


AC代码(略挫,比赛时写的都比较乱):

#include <cstdio>
#include <cstring>
#include <iostream>
#include <algorithm>
#include <cmath>
#include <queue>
#include <stack>
#include <vector>
#include <map>
#include <set>
#include <deque>
#include <cctype>
#define LL long long
#define INF 0x7fffffff
using namespace std;

char a[5][5];

int fun(int *p, int n) {
    sort(p, p + n);
    int ret = 1;
    if(p[0] != 1) {
        for(int i = 1; i <= 9; i ++) {
            int cur = 0;
            for(int j = 0; j < n; j ++) {
                if(p[j] <= i + 4 && p[j] >= i) {
                    cur ++;
                }
                ret = max(ret, cur);
            }
        }
    }
    else if(p[0] == 1) {
        for(int i = 1; i <= 10; i ++) {
            int cur = 0;
            for(int j = 0; j < n; j ++) {
                if(p[j] <= i + 4 && p[j] >= i) {
                    cur ++;
                }
            }
            if(i == 10) cur ++;
            ret = max(ret, cur);
        }
    }
    return ret;
}

int main() {
    int T;
    scanf("%d", &T);
    while(T --) {
        scanf("%s %s %s %s %s", a[0], a[1], a[2], a[3], a[4]);
        int cur = 1;
        int num[5];
        memset(num, 0, sizeof(num));
        for(int i = 0; i < 5; i ++) {
            int len = strlen(a[i]);
            for(int j = 1; j < len; j ++) {
                num[i] = num[i] * 10 + a[i][j] - '0';
            }
        }
        /*for(int i = 0; i < 5; i ++) {
            cout << num[i] << " ";
        }
        cout << endl;*/
        int A[5], B[5], C[5], D[5];
        int an = 0, bn = 0, cn = 0, dn = 0;
        for(int i = 0; i < 5; i++) {
            if(a[i][0] == 'A') A[an ++] = num[i];
            else if(a[i][0] == 'B') B[bn ++] = num[i];
            else if(a[i][0] == 'C') C[cn ++] = num[i];
            else if(a[i][0] == 'D') D[dn ++] = num[i];
        }
        
        int ans = 1;
        ans = max(ans, fun(A, an));
        ans = max(ans, fun(B, bn));
        ans = max(ans, fun(C, cn));
        ans = max(ans, fun(D, dn));
        
        printf("%d\n", 5 - ans);
    }
    return 0;
}





B、ZCC loves strings


思路:找规律,简单博弈,但是坑点较多,总共有Cn取2中情况,然后Miss G赢得情况有奇数和偶数凑一块的时候,还有选择相同字符串的时候,然后特判一下ans是否为0,再取个gcd,记得用longlong,会爆int


AC代码:

#include <cstdio>
#include <cstring>
#include <iostream>
#include <algorithm>
#include <string>
#include <cmath>
#include <queue>
#include <stack>
#include <vector>
#include <map>
#include <set>
#include <deque>
#include <cctype>
#define LL long long
#define INF 0x7fffffff
using namespace std;

int a[200005];

LL gcd(LL a, LL b) {
    return b == 0 ? a : gcd(b, a % b);
}

int main() {
    ios::sync_with_stdio(false);  
    int T, n;
    scanf("%d", &T);
    while(T --) {
        scanf("%d", &n);
        string tmp;
        LL ji = 0, ou = 0;
        map<string, int> mmp;
        LL jia = 0;
        for(int i = 0; i < n; i ++) {
            cin >> tmp;
            if(mmp.find(tmp) != mmp.end()) {
                jia += mmp[tmp];
                mmp[tmp] ++;
            }
            else mmp[tmp] = 1;
            
            a[i] = tmp.length();
            if(a[i] & 1) ji ++;
            else ou ++;
        }
        LL ans = ji * ou;
        LL sum = n * (n - 1) / 2;
        
        ans += jia;
        if(ans == 0) {
            printf("0/1\n");
            continue;
        }
        
        LL gg = gcd(ans, sum);
        ans /= gg;
        sum /= gg;
        cout << ans << '/' << sum << endl;
    }
    return 0;
}






好了,这是我搞算法半年多以来打得稍微好一点的比赛了,虽然前几十分钟在乱搞,但是后来hack环节还是蛮激动的,好感人啊,BC紫名了,虽然质量不是太高,但是还是挺激动地,静静地等着我CF紫名,先贴个图片纪念纪念

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BestCoder Round #41 -- (A,B)

标签:acm   hdu   bestcoder   bc   

原文地址:http://blog.csdn.net/u014355480/article/details/45772843

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