Submission #821728

#	Time	Username	Problem	Language	Result	Execution time	Memory
821728		alvingogo	The Collection Game (BOI21_swaps)	C++14	100 / 100	5 ms	444 KiB

swaps

#include "swaps.h"
#include <bits/stdc++.h>
#define fs first
#define sc second
using namespace std;

void solve(int n, int v) {
    vector<int> a(n);
    iota(a.begin(),a.end(),1);
    for(int p=1;p<n;p<<=1){
        for(int k=p;k>=1;k>>=1){
            vector<pair<int,int> > nw;
            for(int j=k%p;j+k<n;j+=2*k){
                for(int i=0;i+j+k<n && i<k;i++){
                    if((i+j)/(p*2) == (i+j+k)/(p*2)){
                        nw.push_back({i+j,i+j+k});
                        schedule(a[i+j],a[i+j+k]);
                    }
                }
            }
            auto h=visit();
            for(int i=0;i<nw.size();i++){
                if(!h[i]){
                    swap(a[nw[i].fs],a[nw[i].sc]);
                }
            }
        }
    }
    answer(a);
}

Compilation message (stderr)

swaps.cpp: In function 'void solve(int, int)':
swaps.cpp:22:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |             for(int i=0;i<nw.size();i++){
      |                         ~^~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3-1: 3 / 3
• Subtask 3-2: 2 / 2
• Subtask 4-1: 9 / 9
• Subtask 4-2: 6 / 6
• Subtask 5-1: 9 / 9
• Subtask 5-2: 6 / 6
• Subtask 6-1: 21 / 21
• Subtask 6-2: 14 / 14
• Subtask 7-1: 9 / 9
• Subtask 7-2: 6 / 6