Design T-Shirt
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.
#include<iostream>
using namespace std;
struct element{
int number;
double satisfaction;
}s[100], a[100], b;
int adjust(element s[], int low, int high) {
b = s[low];
double x = s[low].satisfaction;
while(low < high){
while(low < high && s[high].satisfaction > x) high--;
if(low<high) { s[low] = s[high]; low++; }
while(low < high && s[low].satisfaction < x) low++;
if(low<high) { s[high] = s[low]; high--; }
}
s[low] = b;
return low;
}
void qsort(element s[], int l, int r) {
if(l < r){
int i = adjust(s, l, r);
qsort(s, l, i-1);
qsort(s, i+1, r);
}
}
int Adjust(element a[], int low, int high) {
b = a[low];
int x = a[low].number;
while(low < high){
while(low < high && a[high].number >= x) high--;
if(low<high) { a[low] = a[high]; low++; }
while(low < high && a[low].number <= x) low++;
if(low<high) { a[high] = a[low]; high--; }
}
a[low] = b;
return low;
}
void qqsort(element a[], int l, int r) {
if(l < r){
int i = Adjust(a, l, r);
qqsort(a, l, i-1);
qqsort(a, i+1, r);
}
}
int main(){
int n, m, k, i;
while(cin>>n>>m>>k){
for(i=0; i<m; i++){
s[i].number = i+1;
s[i].satisfaction = 0;
}
double y;
for(i=0; i<n; i++)
for(int j=0; j<m; j++)
{
cin>>y;
s[j].satisfaction += y;
}
qsort(s, 0, m-1);
int p=0;
for(i=m-k; i<m; i++)
a[p++] = s[i];
qqsort(a, 0, k-1);
for(i=k-1; i>=0; i--)
i==k-1? cout<<a[i].number : cout<<" "<<a[i].number;
cout<<endl;
}
return 0;
}