Submission #1151685

#	Time	Username	Problem	Language	Result	Execution time	Memory
1151685		daoquanglinh2007	Matching (CEOI11_mat)	C++20	26 / 100	866 ms	32548 KiB

mat

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

#define int unsigned
#define pii pair <int, int>
#define fi first
#define se second
#define mp make_pair
#define isz(a) (int)(a).size()

const int NM = 1e6;

int n, m, p[NM+5], h[NM+5], pw[NM+5];
vector <int> arr, ans;
pii st[4*NM+5];

void update(int id, int l, int r, int i, int val){
    if (i < l || i > r) return;
    if (l == r){
        st[id].fi = val > 0;
        st[id].se = val;
        return;
    }
    int mid = (l+r)/2;
    update(2*id, l, mid, i, val);
    update(2*id+1, mid+1, r, i, val);
    st[id] = mp(st[2*id].fi+st[2*id+1].fi, st[2*id].se*pw[st[2*id+1].fi]+st[2*id+1].se);
}

signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    scanf("%d %d", &n, &m);
    for (int i = 1; i <= n; i++){
        scanf("%d", &p[i]);
        p[i]--;
    }
    for (int i = 1; i <= m; i++){
        scanf("%d", &h[i]);
        arr.push_back(h[i]);
    }
    sort(arr.begin(), arr.end());
    for (int i = 1; i <= m; i++) h[i] = lower_bound(arr.begin(), arr.end(), h[i])-arr.begin()+1;

    pw[0] = 1;
    for (int i = 1; i <= n; i++)
        pw[i] = 1LL*pw[i-1]*n;

    int target_res = 0, tmp = 0;
    for (int i = 1; i <= n; i++){
        target_res = target_res*n+p[i];
        tmp = tmp*n+1;
    }

    for (int i = 1; i <= n; i++) update(1, 1, m, h[i], i);
    if (st[1].se-tmp == target_res) ans.push_back(1);

    for (int i = 2; i+n-1 <= m; i++){
        update(1, 1, m, h[i-1], 0);
        update(1, 1, m, h[i+n-1], i+n-1);
        if (st[1].se-i*tmp == target_res) ans.push_back(i);
    }
    printf("%d\n", isz(ans));
    for (int x : ans) printf("%d ", x);
    return 0;
}

Compilation message (stderr)

mat.cpp: In function 'int main()':
mat.cpp:35:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 |     scanf("%d %d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~~
mat.cpp:37:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |         scanf("%d", &p[i]);
      |         ~~~~~^~~~~~~~~~~~~
mat.cpp:41:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |         scanf("%d", &h[i]);
      |         ~~~~~^~~~~~~~~~~~~

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