Submission #518318

#	Time	Username	Problem	Language	Result	Execution time	Memory
518318		LptN21	Matryoshka (JOI16_matryoshka)	C++14	100 / 100	283 ms	11168 KiB

matryoshka

#include <bits/stdc++.h>
using namespace std;
#define fastIO ios_base::sync_with_stdio(false), cin.tie(NULL);
#define PI acos(-1.0)
#define eps 1e-9
#define FF first
#define SS second
// VECTOR (6)
#define pb push_back
#define lb lower_bound
#define ub upper_bound
#define sz(v) int((v).size())
#define all(v) (v).begin(), (v).end()
#define uniq(v) sort(all( (v) )), (v).resize( unique(all( (v) )) - (v).begin() );
// BIT (6)
#define CNTBIT(x) __builtin_popcountll(x)
#define ODDBIT(x) __builtin_parityll(x)
#define MASK(i) (1LL<<(i))
#define BIT(x, i) (((x)>>(i))&1)
#define SUBSET(big, small) (((big)&(small))==(small))
#define MINBIT(x) (x)&(-x)
//typedef
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<ll, int> ii;
/* CODE BELOW */
const int N = 200000 + 7, M = 1e9 + 7;
const int oo = 1e9 + 7;
const int MOD = 1e9 + 7;

int n, m, k, t;

ii a[N], q[N];
int ans[N], idx[N];
int c[N], mx = 0;
int fen[N];

void update(int p, int v) {
    for(;p<=n;p+=p&-p) {
        fen[p] = max(fen[p], v);
    }
}
int query(int p) {
    int ans = 0;
    for(;p>0;p-=p&-p) {
        ans = max(ans, fen[p]);
    }
    return ans;
}

bool cmp(int x, int y) {
    if(q[x].FF != q[y].FF) {
        return q[x].FF < q[y].FF;
    }
    return q[x].SS < q[y].SS;
}

signed main() {
    //freopen("test.inp", "r", stdin);
    //freopen("test.out", "w", stdout);
    //fastIO;
    scanf("%d%d", &n, &m);
    vector<int> rrh;
    for(int i=1;i<=n;i++) {
        scanf("%d%d", &a[i].FF, &a[i].SS);
        rrh.pb(a[i].SS); a[i].SS*= -1;
    }
    sort(a+1, a+n+1); uniq(rrh);
    for(int i=1;i<=m;i++) {
        scanf("%d%d", &q[i].FF, &q[i].SS);
        idx[i] = i;
    }
    sort(idx+1, idx+m+1, cmp);

    for(int j=m, i=n;i>=0;i--) {
        while(j>0&&q[idx[j]].FF>a[i].FF) {
            int tmp = ub(all(rrh), q[idx[j]].SS) - rrh.begin();
            ans[idx[j]] = query(tmp); j--;
        }
        if(i == 0) break;
        a[i].SS = lb(all(rrh), -a[i].SS) - rrh.begin() + 1;
        int k = ub(c+1, c+mx+1, a[i].SS) - c;
        c[k] = a[i].SS; mx = max(mx, k);
        update(a[i].SS, k);
    }

    for(int i=1;i<=m;i++) {
        printf("%d\n", ans[i]);
    }

    return 0;
}

Compilation message (stderr)

matryoshka.cpp: In function 'int main()':
matryoshka.cpp:66:17: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'long long int*' [-Wformat=]
   66 |         scanf("%d%d", &a[i].FF, &a[i].SS);
      |                ~^
      |                 |
      |                 int*
      |                %lld
matryoshka.cpp:71:17: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'long long int*' [-Wformat=]
   71 |         scanf("%d%d", &q[i].FF, &q[i].SS);
      |                ~^
      |                 |
      |                 int*
      |                %lld
matryoshka.cpp:63:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   63 |     scanf("%d%d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~
matryoshka.cpp:66:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   66 |         scanf("%d%d", &a[i].FF, &a[i].SS);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
matryoshka.cpp:71:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   71 |         scanf("%d%d", &q[i].FF, &q[i].SS);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 11 / 11
• Subtask 2: 15 / 15
• Subtask 3: 25 / 25
• Subtask 4: 49 / 49