제출 #1026390

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1026390		ezzzay	Arranging Shoes (IOI19_shoes)	C++14	50 / 100	184 ms	278248 KiB

shoes

#include<bits/stdc++.h>
#include"shoes.h"
using namespace std;
#define ff first
#define ss second
#define pb push_back
const int N=3e5+5;
int bit[N];
int a[N];
vector<int>ans;
int n;
const int mxN=2e5;
vector<int> tree(4*mxN);
int cal(int node, int L, int R, int l, int r){
    if(L>r||R<l) return 0;
    if(L>=l&&R<=r) return tree[node];
    return cal(node*2,L,(L+R)/2,l,r)+cal(node*2+1,(L+R)/2+1,R,l,r);
}
void up(int node, int L, int R, int l, int r){
    if(L>r||R<l) return;
    if(L==R){
        tree[node]=1;
        return;
    }
    up(node*2,L,(L+R)/2,l,r);
    up(node*2+1,(L+R)/2+1,R,l,r);
    tree[node]=tree[node*2]+tree[node*2+1];
}
int find(int idx){
    int s=0;
    while(idx>0){
        s+=bit[idx];
        idx-= idx & -idx;
    }
    return s;
}
void update(int idx, int val){
    while(idx<N){
        bit[idx]+=val;
        idx+= idx & -idx;
    }
}
int fun(){
    
    int s=0;
    for(int i=1;i<=n;i++){
        s+=cal(1,1,n,a[i],n);
        up(1,1,n,a[i],a[i]);
    }
    return s;
}
long long count_swaps(vector<int> s) {
    
    
    vector<int> p(s.size());
    vector<stack<int> > v(s.size()+s.size()+1);
    for(int i=s.size()-1; i>=0; i--){
        v[s[i]+s.size()].push(i);
    }
    for(int i=0,j=0; i<s.size(); i++){
        if(!v[s[i]+s.size()].empty()&&v[s[i]+s.size()].top()==i){
            if(s[i]<0){
                p[j]=i;
                j++;
                p[j++]=v[-s[i]+s.size()].top();
                v[s[i]+s.size()].pop();
                v[-s[i]+s.size()].pop();
            }else{
                p[j++]=v[-s[i]+s.size()].top();
                p[j]=i;
                v[s[i]+s.size()].pop();
                v[-s[i]+s.size()].pop();
                j++;
            }
        }
    }
    n=s.size();
   for(int i=0;i<n;i++){
       a[i+1]=p[i];
   }
    return fun();
    
}

컴파일 시 표준 에러 (stderr) 메시지

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:60:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   60 |     for(int i=0,j=0; i<s.size(); i++){
      |                      ~^~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 15
• Subtask 5: 20 / 20
• Subtask 6: 0 / 15