Submission #1284174

#	Time	Username	Problem	Language	Result	Execution time	Memory
1284174		escobrand	Matching (CEOI11_mat)	C++20	37 / 100	481 ms	23248 KiB

mat

#include <bits/stdc++.h>

using namespace std;
#define fi first
#define se second
#define ll long long
#define all(v) v.begin(),v.end()
#define mk make_pair
#define pb push_back
#define eb emplace_back
typedef pair<int,int> pii;

int i,n,m,j;
const int maxn = 1e6 + 10;
int a[maxn];
int b[maxn];

vector<int>com;
int bit[maxn];

void up(int i,int tmp)
{
    for(;i<maxn;i+=i&-i)bit[i] += tmp;
}

int cal(int i)
{
    int ans = 0;
    for(;i;i-=i&-i)ans += bit[i];
    return ans;
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    if(fopen("MOHINHGIA.INP","r"))
    {
        freopen("MOHINHGIA.INP","r",stdin);
        freopen("MOHINHGIA.OUT","w",stdout);
    }

    cin>>n>>m;
    for(i = 1;i<=n;i++)
    {
        int t;
        cin>>t;
        a[t-1]=i;
    }
    for(i = 0;i<n;i++)
    {
//        cin>>a[i];
        up(a[i],1);
        a[i] = cal(a[i]);
    }
    for(i = 0;i<maxn;i++)bit[i] = 0;

    com.resize(m);
    for(i = 0;i<m;i++)
    {
        cin>>b[i];
        com[i] = b[i];
    }

    sort(all(com));
    com.resize(unique(all(com))-com.begin());
    int l = 0;
    vector<int>ans;
    for(i = 0;i<m;i++)
    {
        b[i] = upper_bound(all(com),b[i])-com.begin();
        up(b[i],1);
        int tmp = cal(b[i]);
        while(i-l>=0 && tmp != a[i-l])
        {
            tmp -= (b[l]<b[i]);
            up(b[l++],-1);
        }
        if(i-l==n-1)ans.pb(l+1);
    }
    cout<<ans.size()<<'\n';
    for(int k : ans)cout<<k<<' ';

    return 0;
}

Compilation message (stderr)

mat.cpp: In function 'int main()':
mat.cpp:39:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 |         freopen("MOHINHGIA.INP","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
mat.cpp:40:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |         freopen("MOHINHGIA.OUT","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 9
• Subtask 2: 9 / 9
• Subtask 3: 0 / 9
• Subtask 4: 0 / 9
• Subtask 5: 0 / 9
• Subtask 6: 9 / 9
• Subtask 7: 0 / 9
• Subtask 8: 9 / 9
• Subtask 9: 0 / 8
• Subtask 10: 10 / 10
• Subtask 11: 0 / 10