Submission #428478

#	Time	Username	Problem	Language	Result	Execution time	Memory
428478		tqbfjotld	Cheerleaders (info1cup20_cheerleaders)	C++14	25 / 100	2057 ms	7376 KiB

cheerleaders

#include <bits/stdc++.h>
using namespace std;

int arr[(1<<17)+5];

vector<int> f1(vector<int> v){
    vector<int> nw;
    for (int x = 0; x<v.size(); x+=2){
        nw.push_back(v[x]);
    }
    for (int x = 1; x<v.size(); x+=2){
        nw.push_back(v[x]);
    }
    return nw;
}

vector<long long> allvals(vector<int> things){
    if (things.size()==1){
        return {0};
    }
    long long inter1 = 0,inter2 = 0;
    vector<int> l,r;
    for (int x = 0; x<things.size(); x++){
        if (x<things.size()/2) l.push_back(things[x]);
        else r.push_back(things[x]);
    }
    vector<long long> r1 = allvals(l);
    vector<long long> r2 = allvals(r);
    vector<long long> ans;
    sort(l.begin(),l.end());
    sort(r.begin(),r.end());
    long long c1 = 0;
    for (auto x : r){
        while (c1<l.size() && l[c1]<x) c1++;
        inter2 += c1;
    }
    inter1 = ((long long)l.size()*(long long)(l.size()))-inter2;
   // printf("inter = %lld %lld\n",inter1,inter2);
    for (int x = 0; x<l.size(); x++){
        ans.push_back(r1[x]+r2[x]+inter1);
    }
    for (int x = 0; x<l.size(); x++){
        ans.push_back(r1[x]+r2[x]+inter2);
    }
    return ans;

}
int n,logn;

int main(){
    scanf("%d",&n);
    logn = n;
    n = 1<<n;
    vector<int> t;
    for(int x = 0; x<n; x++){
        scanf("%d",&arr[x]);
        t.push_back(arr[x]);
    }
    long long ans = 999999999999999999LL;
    for (int x = 0; x<logn; x++){
        auto res = allvals(t);
        for (auto x : res){
            ans = min(ans,x);
            //printf("%lld \n",x);
        }
        t = f1(t);
    }

    printf("%lld\n",ans);
}

Compilation message (stderr)

cheerleaders.cpp: In function 'std::vector<int> f1(std::vector<int>)':
cheerleaders.cpp:8:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 |     for (int x = 0; x<v.size(); x+=2){
      |                     ~^~~~~~~~~
cheerleaders.cpp:11:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |     for (int x = 1; x<v.size(); x+=2){
      |                     ~^~~~~~~~~
cheerleaders.cpp: In function 'std::vector<long long int> allvals(std::vector<int>)':
cheerleaders.cpp:23:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |     for (int x = 0; x<things.size(); x++){
      |                     ~^~~~~~~~~~~~~~
cheerleaders.cpp:24:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |         if (x<things.size()/2) l.push_back(things[x]);
      |             ~^~~~~~~~~~~~~~~~
cheerleaders.cpp:34:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |         while (c1<l.size() && l[c1]<x) c1++;
      |                ~~^~~~~~~~~
cheerleaders.cpp:39:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |     for (int x = 0; x<l.size(); x++){
      |                     ~^~~~~~~~~
cheerleaders.cpp:42:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |     for (int x = 0; x<l.size(); x++){
      |                     ~^~~~~~~~~
cheerleaders.cpp: In function 'int main()':
cheerleaders.cpp:51:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   51 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
cheerleaders.cpp:56:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   56 |         scanf("%d",&arr[x]);
      |         ~~~~~^~~~~~~~~~~~~~

• Subtask 1: 0 / 16
• Subtask 2: 5 / 10
• Subtask 3: 20 / 25
• Subtask 4: 0 / 21
• Subtask 5: 0 / 28