hdu 5095 Linearization of the kernel functions in SVM 坑多的水题细节

￡神魔★判官ぃ 2021-10-24 05:36 96阅读 0赞

题目链接：http://acm.hdu.edu.cn/showproblem.php?pid=5095

几个坑

系数为正负1是不输出系数（比赛时wa到死）

0时不输出但全零时要输出0

加号和减号的控制

#include <cstring>
    #include <cstdlib>
    #include <cstring>
    #include <cmath>
    #include <algorithm>
    #include <iostream>
    #include <cstdio>
    #include <stack>
    #include <vector>
    #include <queue>
    #include <map>
    #include <set>
    
    using namespace std;
    
    const int maxn = 110;
    
    int a[maxn];
    const char ch[] = "pqruvwxyz";
    
    int main()
    {
        //freopen("in.txt", "r", stdin);
    
        int T;
        scanf("%d", &T);
        while(T--)
        {
            for(int i = 0; i < 10; i++)
                scanf("%d", &a[i]);
    
            bool flag = false;
            for(int i = 0; i < 9; i++)
            {
                if(a[i] > 0)
                {
                    if(flag)
                        printf("+");
    
                    if(a[i] == 1)
                        printf("%c", ch[i]);
                    else
                        printf("%d%c", a[i], ch[i]);
    
                    flag = true;
                }
                else if(a[i] < 0)
                {
                    if(a[i] == -1)
                        printf("-%c", ch[i]);
                    else
                        printf("%d%c", a[i], ch[i]);
    
                    flag = true;
                }
            }
    
            if(!flag)
            {
                printf("%d", a[9]);
            }
            else
            {
                if(a[9] > 0)
                    printf("+%d", a[9]);
                else if(a[9] < 0)
                    printf("%d", a[9]);
            }
            printf("\n");
    
    
        }
        return 0;
    }

转载于:https://www.cnblogs.com/dishu/p/4517784.html