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Submission #46751

# Submission time Handle Problem Language Result Execution time Memory
46751 2018-04-22T17:23:31 Z dqhungdl Palembang Bridges (APIO15_bridge) C++17
100 / 100
 951 ms 35232 KB 
#include <bits/stdc++.h>
using namespace std;

typedef pair<int64_t,int64_t> ii;
typedef pair<int64_t,ii> iii;
int64_t T,n,res=0,Count=1,minn=1e18,Num[3],Pre[200005];
ii tree[3][800005];
vector<int64_t> VV;
vector<iii> V;
map<int64_t,int64_t> F;

void Update(int64_t t,int64_t k,int64_t l,int64_t r,int64_t pos,int64_t val,int64_t cnt)
{
    if(l==r)
    {
        tree[t][k].first+=val;
        tree[t][k].second+=cnt;
        return;
    }
    int64_t mid=(l+r)/2;
    if(pos<=mid)
        Update(t,2*k,l,mid,pos,val,cnt);
    else
        Update(t,2*k+1,mid+1,r,pos,val,cnt);
    tree[t][k].first=tree[t][2*k].first+tree[t][2*k+1].first;
    tree[t][k].second=tree[t][2*k].second+tree[t][2*k+1].second;
}

int64_t Median(int64_t t,int64_t k,int64_t l,int64_t r,int64_t sum)
{
    if(l==r)
        return l;
    int64_t mid=(l+r)/2;
    if(sum+tree[t][2*k].second>=Num[t]/2)
        return Median(t,2*k,l,mid,sum);
    else
        return Median(t,2*k+1,mid+1,r,sum+tree[t][2*k].second);
}

ii Query(int64_t t,int64_t k,int64_t l,int64_t r,int64_t L,int64_t R)
{
    if(l>R||L>r)
        return ii(0,0);
    if(L<=l&&r<=R)
        return tree[t][k];
    int64_t mid=(l+r)/2;
    ii rs,rs1=Query(t,2*k,l,mid,L,R),rs2=Query(t,2*k+1,mid+1,r,L,R);
    return ii(rs1.first+rs2.first,rs1.second+rs2.second);
}

int main()
{
    ios_base::sync_with_stdio(false);
    //freopen("TEST.INP","r",stdin);
    cin>>T>>n;
    char c1,c2;
    int64_t t1,t2;
    while(n--)
    {
        cin>>c1>>t1>>c2>>t2;
        if(c1==c2)
            res+=abs(t1-t2);
        else
        {
            res++;
            V.push_back(iii(t1+t2,ii(t1,t2)));
            VV.push_back(t1);
            VV.push_back(t2);
        }
    }
    if(V.size()==0)
    {
        cout<<res;
        return 0;
    }
    sort(VV.begin(),VV.end());
    F[VV[0]]=1;
    Pre[1]=VV[0];
    for(int64_t i=1; i<VV.size(); i++)
        if(VV[i]>VV[i-1])
        {
            Pre[++Count]=VV[i];
            F[VV[i]]=Count;
        }
    sort(V.begin(),V.end());
    for(int64_t i=0; i<V.size(); i++)
    {
        Update(2,1,1,Count,F[V[i].second.first],V[i].second.first,1);
        Update(2,1,1,Count,F[V[i].second.second],V[i].second.second,1);
    }
    Num[2]=V.size()*2;
    for(int64_t i=0; i<V.size(); i++)
    {
        Update(1,1,1,Count,F[V[i].second.first],V[i].second.first,1);
        Update(1,1,1,Count,F[V[i].second.second],V[i].second.second,1);
        Update(2,1,1,Count,F[V[i].second.first],-V[i].second.first,-1);
        Update(2,1,1,Count,F[V[i].second.second],-V[i].second.second,-1);
        Num[1]+=2;
        Num[2]-=2;
        int64_t t1=Median(1,1,1,Count,0);
        int64_t t2=Median(2,1,1,Count,0);
        int64_t sum=0;
        ii rs1=Query(1,1,1,Count,1,t1),rs2=Query(1,1,1,Count,t1,Count);
        sum+=Pre[t1]*rs1.second-rs1.first+rs2.first-Pre[t1]*rs2.second;
        rs1=Query(2,1,1,Count,1,t2),rs2=Query(2,1,1,Count,t2,Count);
        sum+=Pre[t2]*rs1.second-rs1.first+rs2.first-Pre[t2]*rs2.second;
        if(T==2||(T==1&&i==V.size()-1))
            minn=min(minn,sum);
    }
    cout<<res+minn;
}

Compilation message

bridge.cpp: In function 'int main()':
bridge.cpp:79:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int64_t i=1; i<VV.size(); i++)
                      ~^~~~~~~~~~
bridge.cpp:86:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int64_t i=0; i<V.size(); i++)
                      ~^~~~~~~~~
bridge.cpp:92:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int64_t i=0; i<V.size(); i++)
                      ~^~~~~~~~~
bridge.cpp:107:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if(T==2||(T==1&&i==V.size()-1))
                         ~^~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 380 KB Output is correct
2 Correct 2 ms 488 KB Output is correct
3 Correct 3 ms 500 KB Output is correct
4 Correct 4 ms 648 KB Output is correct
5 Correct 5 ms 672 KB Output is correct
6 Correct 2 ms 672 KB Output is correct
7 Correct 4 ms 896 KB Output is correct
8 Correct 4 ms 896 KB Output is correct
9 Correct 4 ms 896 KB Output is correct
10 Correct 2 ms 896 KB Output is correct
11 Correct 4 ms 896 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 896 KB Output is correct
2 Correct 2 ms 896 KB Output is correct
3 Correct 2 ms 896 KB Output is correct
4 Correct 4 ms 896 KB Output is correct
5 Correct 5 ms 896 KB Output is correct
6 Correct 2 ms 896 KB Output is correct
7 Correct 4 ms 896 KB Output is correct
8 Correct 4 ms 896 KB Output is correct
9 Correct 4 ms 896 KB Output is correct
10 Correct 3 ms 896 KB Output is correct
11 Correct 6 ms 972 KB Output is correct
12 Correct 54 ms 4864 KB Output is correct
13 Correct 900 ms 35036 KB Output is correct
14 Correct 298 ms 35036 KB Output is correct
15 Correct 451 ms 35036 KB Output is correct
16 Correct 57 ms 35036 KB Output is correct
17 Correct 437 ms 35164 KB Output is correct
18 Correct 463 ms 35164 KB Output is correct
19 Correct 438 ms 35164 KB Output is correct
20 Correct 89 ms 35164 KB Output is correct
21 Correct 452 ms 35220 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 35220 KB Output is correct
2 Correct 2 ms 35220 KB Output is correct
3 Correct 2 ms 35220 KB Output is correct
4 Correct 2 ms 35220 KB Output is correct
5 Correct 2 ms 35220 KB Output is correct
6 Correct 2 ms 35220 KB Output is correct
7 Correct 2 ms 35220 KB Output is correct
8 Correct 2 ms 35220 KB Output is correct
9 Correct 3 ms 35220 KB Output is correct
10 Correct 2 ms 35220 KB Output is correct
11 Correct 2 ms 35220 KB Output is correct
12 Correct 2 ms 35220 KB Output is correct

Subtask #4
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 35220 KB Output is correct
2 Correct 2 ms 35220 KB Output is correct
3 Correct 2 ms 35220 KB Output is correct
4 Correct 2 ms 35220 KB Output is correct
5 Correct 2 ms 35220 KB Output is correct
6 Correct 2 ms 35220 KB Output is correct
7 Correct 2 ms 35220 KB Output is correct
8 Correct 2 ms 35220 KB Output is correct
9 Correct 2 ms 35220 KB Output is correct
10 Correct 2 ms 35220 KB Output is correct
11 Correct 2 ms 35220 KB Output is correct
12 Correct 2 ms 35220 KB Output is correct
13 Correct 2 ms 35220 KB Output is correct
14 Correct 3 ms 35220 KB Output is correct
15 Correct 5 ms 35220 KB Output is correct
16 Correct 2 ms 35220 KB Output is correct
17 Correct 3 ms 35220 KB Output is correct
18 Correct 3 ms 35220 KB Output is correct
19 Correct 3 ms 35220 KB Output is correct
20 Correct 4 ms 35220 KB Output is correct
21 Correct 4 ms 35220 KB Output is correct
22 Correct 4 ms 35220 KB Output is correct
23 Correct 2 ms 35220 KB Output is correct
24 Correct 4 ms 35220 KB Output is correct

Subtask #5
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 35220 KB Output is correct
2 Correct 2 ms 35220 KB Output is correct
3 Correct 2 ms 35220 KB Output is correct
4 Correct 2 ms 35220 KB Output is correct
5 Correct 2 ms 35220 KB Output is correct
6 Correct 2 ms 35220 KB Output is correct
7 Correct 2 ms 35220 KB Output is correct
8 Correct 2 ms 35220 KB Output is correct
9 Correct 2 ms 35220 KB Output is correct
10 Correct 2 ms 35220 KB Output is correct
11 Correct 2 ms 35220 KB Output is correct
12 Correct 2 ms 35220 KB Output is correct
13 Correct 3 ms 35220 KB Output is correct
14 Correct 3 ms 35220 KB Output is correct
15 Correct 4 ms 35220 KB Output is correct
16 Correct 2 ms 35220 KB Output is correct
17 Correct 2 ms 35220 KB Output is correct
18 Correct 3 ms 35220 KB Output is correct
19 Correct 2 ms 35220 KB Output is correct
20 Correct 4 ms 35220 KB Output is correct
21 Correct 4 ms 35220 KB Output is correct
22 Correct 4 ms 35220 KB Output is correct
23 Correct 2 ms 35220 KB Output is correct
24 Correct 4 ms 35220 KB Output is correct
25 Correct 58 ms 35220 KB Output is correct
26 Correct 109 ms 35220 KB Output is correct
27 Correct 817 ms 35220 KB Output is correct
28 Correct 849 ms 35220 KB Output is correct
29 Correct 951 ms 35232 KB Output is correct
30 Correct 412 ms 35232 KB Output is correct
31 Correct 63 ms 35232 KB Output is correct
32 Correct 419 ms 35232 KB Output is correct
33 Correct 464 ms 35232 KB Output is correct
34 Correct 435 ms 35232 KB Output is correct
35 Correct 68 ms 35232 KB Output is correct
36 Correct 443 ms 35232 KB Output is correct
37 Correct 60 ms 35232 KB Output is correct