Design T-Shirt
Problem Description
Soon after he decided to design a T-shirt for our Algorithm Board on Free-City BBS, XKA found that he was trapped by all kinds of suggestions from everyone on the board. It is indeed a mission-impossible to have everybody perfectly satisfied. So he took a poll
to collect people‘s opinions. Here are what he obtained: N people voted for M design elements (such as the ACM-ICPC logo, big names in computer science, well-known graphs, etc.). Everyone assigned each element a number of satisfaction. However, XKA can only
put K (<=M) elements into his design. He needs you to pick for him the K elements such that the total number of satisfaction is maximized.
Input
The input consists of multiple test cases. For each case, the first line contains three positive integers N, M and K where N is the number of people, M is the number of design elements, and K is the number of elements XKA will put into his design. Then N lines
follow, each contains M numbers. The j-th number in the i-th line represents the i-th person‘s satisfaction on the j-th element.
Output
For each test case, print in one line the indices of the K elements you would suggest XKA to take into consideration so that the total number of satisfaction is maximized. If there are more than one solutions, you must output the one with minimal indices. The
indices start from 1 and must be printed in non-increasing order. There must be exactly one space between two adjacent indices, and no extra space at the end of the line.
Sample Input
3 6 4
2 2.5 5 1 3 4
5 1 3.5 2 2 2
1 1 1 1 1 10
3 3 2
1 2 3
2 3 1
3 1 2
Sample Output
n个人，m件衣服，输出评价最高的前k件，输出时，评价同样的标号大的先输出。一定要二次排，由于可能所有的评价一样高，仅仅排一次输出就会有错误。
代码例如以下：
#include<cstdio>
#include<algorithm>
using namespace std;
struct ss{
double v;
int x;
};
bool cmp1(ss x,ss y){
if(x.v>y.v) return true;
else return false;
}
bool cmp2(ss x,ss y){
if(x.x>y.x) return true;
else return false;
}
int main(){
int n,m,k;
double t;
ss f[1010];
while(scanf("%d%d%d",&n,&m,&k)==3){
for(int i=0;i<m;i++)
f[i].v=0;
while(n--)
for(int i=0;i<m;i++){
scanf("%lf",&t);
f[i].v+=t;
f[i].x=i+1;
}
sort(f,f+m,cmp1);
sort(f,f+k,cmp2);//二次排。仅仅排前k项
for(int i=0;i<k;i++){
if(i!=0) printf(" ");
printf("%d",f[i].x);
}
printf("\n");
}
return 0;
}
