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Submission #408782

# Submission time Handle Problem Language Result Execution time Memory
408782 2021-05-19T15:54:27 Z MOUF_MAHMALAT Palembang Bridges (APIO15_bridge) C++14
22 / 100
 51 ms 7500 KB 
#include<bits/stdc++.h>
#define all(s) s.begin(),s.end()
using namespace std;
typedef long long ll;
ll n,k,ans,x,y,p[200009],a[200009];
char c1,c2;
vector<ll>v;
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin>>k>>n;
    for(ll i=0; i<n; i++)
    {
        cin>>c1>>x>>c2>>y;
        if(c1==c2)
            ans+=abs(x-y);
        else
        {
            v.push_back(x);
            v.push_back(y);
            ans++;//for bridge length
        }
    }
    n=v.size();
    v.push_back(-1),sort(all(v));
    for(ll i=1; i<v.size(); i++)
        p[i]=p[i-1]+v[i];
    for(ll i=1; i<v.size(); i++)
    {
        ll psum=abs(p[i]-i*v[i]);
        ll ssum=abs(p[n]-p[i]-(n-i)*v[i]);
        a[i] = psum + ssum;
        if(k==1)
            continue;
        ll l=i-1,r=n+1,m;
        while(r-l>1)
        {
            m=(l+r)/2;
            ll m2=(v[i]+v[m])/2,id,le=i-1,re=m+1;
            while(re-le>1)
            {
                id=(le+re)/2;
                if(v[id]<=m2)
                    le=id;
                else
                    re=id;
            }
            id=le;
            psum=abs(p[i]-i*v[i])+abs(p[id]-p[i]*(id-i)*v[i]);
            ssum=abs(p[m]-p[id]-(m-id)*v[m])+abs(p[n]-p[m-1]-(n-m)*v[m]);
            if(a[i]<=psum+ssum)
            {
                a[i]=psum+ssum;
                l=m;
            }
            else
                r=m;
        }

    }
    for(ll i=2; i<=n; i++)
        a[i]=min(a[i],a[i-1]);
    cout<<a[n]+ans;
    return 0;
}

Compilation message

bridge.cpp: In function 'int main()':
bridge.cpp:28:18: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |     for(ll i=1; i<v.size(); i++)
      |                 ~^~~~~~~~~
bridge.cpp:30:18: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |     for(ll i=1; i<v.size(); i++)
      |                 ~^~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 376 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 2 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 372 KB Output is correct
11 Correct 1 ms 376 KB Output is correct
12 Correct 29 ms 5820 KB Output is correct
13 Correct 51 ms 7448 KB Output is correct
14 Correct 38 ms 5792 KB Output is correct
15 Correct 30 ms 4552 KB Output is correct
16 Correct 37 ms 6752 KB Output is correct
17 Correct 51 ms 7380 KB Output is correct
18 Correct 45 ms 7016 KB Output is correct
19 Correct 50 ms 7500 KB Output is correct
20 Correct 37 ms 6988 KB Output is correct
21 Correct 46 ms 7096 KB Output is correct

Subtask #3
0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Incorrect 1 ms 332 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Incorrect 1 ms 332 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 324 KB Output is correct
3 Incorrect 1 ms 332 KB Output isn't correct
4 Halted 0 ms 0 KB -