Submission #320897

#	Time	Username	Problem	Language	Result	Execution time	Memory
320897		egas	Pilot (NOI19_pilot)	C++14	89 / 100	1099 ms	97344 KiB

pilot

#include <bits/stdc++.h>

using namespace std;

template < typename third >

class SegmentTree {

private:

    third *Stree;

    third *Snum;

    long long n;

    third NullValue = 0;

    third combine(third a, third b) {

        return max(a,b);

    }

    void build(long long idx, long long s, long long e) {

        if (s > e)

            return;

        if (s == e) {

            Stree[idx] = Snum[s];

            return ;

        }

        long long m = ( s + e ) / 2;

        build( 2 * idx, s, m);

        build( 2 * idx + 1, m + 1, e);

        Stree[idx] = combine(Stree[2 * idx], Stree[2 * idx + 1] );

        return;

    }

    third queryUtil(long long idx, long long s, long long e, long long l, long long r) {

        if (l > e || r < s)

            return NullValue;

        if (s >= l && e <= r) {

            return Stree[idx];

        }

        long long m = ( s + e ) / 2;

        third left = queryUtil(2 * idx, s, m, l, r);

        third right = queryUtil(2 * idx + 1, m + 1, e, l, r);

        return combine(left, right );

    }

public:

    SegmentTree(vector<third> a) {

        this->n = a.size();

        Stree = new third[4 * n + 5];

        Snum = new third[n];

        for (long long i = 0; i < n; i++) {

            Snum[i] = a[i];

        }

        build(1, 0, n - 1);

    }

    third query(long long l, long long r) {

        return queryUtil(1, 0, n - 1, l - 1, r - 1);

    }

};

int32_t main() {

    ios_base::sync_with_stdio(false);

    cin.tie(0);

    long long n;

    cin >> n;

    long long m;

    cin >> m;

    vector<long long> a(n);

    for(long long i = 0 ; i < n ; i++) {

        cin >> a[i];

    }

    vector<long long> b(m);

    for(long long i = 0 ; i < m ; i++) {

        cin >> b[i];

    }

    vector<long long> diff(1000005,0);

    SegmentTree<long long> ST(a);

    map<long long,long long> last;

    for(long long i = 0 ; i < a.size() ; i++) {

        last[a[i]]=-1;

    }

    for(long long i=0; i<n; i++) {

        long long ryt=0;

        long long l=i;

        long long r=a.size()-1;

        while(l<=r) {

            if(l==r) {

                if(ST.query(i+1,l+1)<=a[i]) {

                    ryt=max(ryt,l);

                }

                break;

            }

            long long m=(l+r)/2;

            if(ST.query(i+1,m+1)>a[i]) {

                r=m-1;

            } else {

                l=m+1;

                ryt=max(ryt,m);

            }

        }

        ryt=ryt-i+1;

        ryt--;

        long long left=1e9;

        l=last[a[i]]+1;

        r=i;

        while(l<=r) {

            if(l==r) {

                if(ST.query(l+1,i+1)<=a[i]) {

                    left=min(left,l);

                }

                break;

            }

            long long m=(l+r)/2;

            if(ST.query(m+1,i+1)>a[i]) {

                l=m+1;

            } else {

                r=m-1;

                left=min(left,m);

            }

        }

        left=i-left;

        last[a[i]]=i;

        diff[a[i]]+=((left+1)*(ryt+1));

    }

    for(long long i=1; i<diff.size(); i++) {

        diff[i]+=diff[i-1];

    }

    for(long long i = 0 ; i < b.size() ; i++) {

        cout << diff[b[i]] << '\n';

    }

    return 0;

}

Compilation message (stderr)

pilot.cpp: In function 'int32_t main()':
pilot.cpp:137:29: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  137 |     for(long long i = 0 ; i < a.size() ; i++) {
      |                           ~~^~~~~~~~~~
pilot.cpp:229:25: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  229 |     for(long long i=1; i<diff.size(); i++) {
      |                        ~^~~~~~~~~~~~
pilot.cpp:235:29: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  235 |     for(long long i = 0 ; i < b.size() ; i++) {
      |                           ~~^~~~~~~~~~

• Subtask 1: 3 / 3
• Subtask 2: 10 / 10
• Subtask 3: 12 / 12
• Subtask 4: 15 / 15
• Subtask 5: 5 / 5
• Subtask 6: 9 / 9
• Subtask 7: 14 / 14
• Subtask 8: 10 / 10
• Subtask 9: 11 / 11
• Subtask 10: 0 / 11