Submission #721995

#	Time	Username	Problem	Language	Result	Execution time	Memory
721995		n0sk1ll	Palembang Bridges (APIO15_bridge)	C++17	0 / 100	1 ms	212 KiB

bridge

#include <bits/stdc++.h>

#define FAST ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);cerr.tie(0)
#define mp make_pair
#define xx first
#define yy second
#define pb push_back
#define pf push_front
#define popb pop_back
#define popf pop_front
#define all(x) x.begin(),x.end()
#define ff(i,a,b) for (int i = a; i < b; i++)
#define fff(i,a,b) for (int i = a; i <= b; i++)
#define bff(i,a,b) for (int i = b-1; i >= a; i--)
#define bfff(i,a,b) for (int i = b; i >= a; i--)

using namespace std;
long double typedef ld;
unsigned int typedef ui;
long long int typedef li;
pair<int,int> typedef pii;
pair<li,li> typedef pli;
pair<ld,ld> typedef pld;
vector<vector<int>> typedef graph;
unsigned long long int typedef ull;
//const int mod = 998244353;
//const int mod = 1000000007;







//Note to self: Check for overflow

vector<pii> segs;
map<int,li> stat;
map<int,li> koef;
set<int> kords;

li solve1()
{
    int n=(int)segs.size();
    for (auto [l,r] : segs)
    {
        kords.insert(l),kords.insert(r+1);
        stat[0]+=r,stat[r+1]-=r,koef[0]--,koef[r+1]++; //adduje jednu pravu y=-x + qrac
        koef[l]++; //adduje drugu pravu y=x + qrac
    }

    li k=0,s=0,ans=4e18;
    for (auto x : kords)
    {
        k+=koef[x],s+=stat[x];
        ans=min(ans,k*x+s);
    }

    return ans;
}

li solve2()
{
    return 0ll;
}

int main()
{
    FAST;

    li neces=0;
    int k,n; cin>>k>>n;
    ff(i,0,n)
    {
        char _,__; int a,b;
        cin>>_>>a>>__>>b;
        if (a>b) swap(a,b);
        if (_!=__) segs.pb({a,b});
        else neces+=b-a;
    }

    if (k==1) cout<<neces+solve1()<<"\n";
    else cout<<neces+solve2()<<"\n";
}

//Note to self: Check for overflow

/*

1 5
B 0 A 4
B 1 B 3
A 5 B 7
B 2 A 6
B 1 A 7

2 5
B 0 A 4
B 1 B 3
A 5 B 7
B 2 A 6
B 1 A 7

*/

Compilation message (stderr)

bridge.cpp: In function 'li solve1()':
bridge.cpp:44:9: warning: unused variable 'n' [-Wunused-variable]
   44 |     int n=(int)segs.size();
      |         ^

• Subtask 1: 0 / 8
• Subtask 2: 0 / 14
• Subtask 3: 0 / 9
• Subtask 4: 0 / 32
• Subtask 5: 0 / 37