#include <bits/stdc++.h>
using namespace std;
struct gyventojas
{
char p;
double s;
char q;
double t;
};
const int maxn = 100000;
const long long daug = 1000000000000000;
int k, n, kiek;
gyventojas M[maxn];
vector <int> reikalingi;
vector <int> nereikalingi;
vector <int> medianai;
vector <int> unikalus;
set <int> buvo;
long long skaiciuok_keliu_suma(int tiltas1, int tiltas2)
{
long long ats = 0;
if(kiek>0)
{
if(k == 1)
{
for(int i = 0; i<reikalingi.size(); i++)
{
int j = reikalingi[i];
ats += abs(M[j].s - tiltas1) + abs(M[j].t - tiltas1);
}
}
else
{
for(int f = 0; f<reikalingi.size(); f++)
{
int x = reikalingi[f];
int a1 = abs(M[x].s - tiltas1) + abs(M[x].t - tiltas1);
int a2 = abs(M[x].s - tiltas2) + abs(M[x].t - tiltas2);
ats += min(a1, a2);
}
}
}
for(int i = 0; i<nereikalingi.size(); i++)
{
int j = nereikalingi[i];
ats += abs(M[j].s - M[j].t);
}
return ats + reikalingi.size();
}
int main()
{
ios_base::sync_with_stdio(false); cin.tie(0);
cin >> k >> n;
pair<double, int> st2[n];
int j = 0;
for(int i = 0; i<n; i++)
{
cin >> M[i].p >> M[i].s >> M[i].q >> M[i].t;
if(M[i].p != M[i].q)
{
//cout << i << endl;
medianai.push_back(M[i].s);
medianai.push_back(M[i].t);
st2[j++] = {(M[i].s+M[i].t)/2, i};
reikalingi.push_back(i);
}
else nereikalingi.push_back(i);
}
/*for(int i = 0; i<reikalingi.size(); i++)
{
cout << st2[i].first << ' ' << st2[i].second << endl;
}
cout << st2[0].second << ' ' << st2[1].second;*/
sort(medianai.begin(), medianai.end());
kiek = reikalingi.size();
if(k==1)
{
if(kiek > 0) cout << skaiciuok_keliu_suma(medianai[medianai.size()/2], -1);
else cout << skaiciuok_keliu_suma(-1, -1);
}
else
{
long long galats = 0;
if(kiek > 0)
{
galats = daug;A
n = reikalingi.size();
sort(st2, st2+n);
long long sumos_kaire[n-1];
long long sumos_desine[n-1];
///i kaire puse
priority_queue <int> q1;
priority_queue <int> q2;
long long s1 = 0;
long long s2 = 0;
int s = M[st2[0].second].s;
int t = M[st2[0].second].t;
//cout << '[' << st2[0].second+1 << endl;
if(s>t) swap(s, t);
q1.push(s);
q2.push(-t);
s1 += s;
s2 += t;
sumos_kaire[0] = -s1+s2;
//cout << sumos_kaire[0] << ' ';
//cout << ']' << s1 << ' ' << s2 << endl;
for(int i = 1; i<n-1; i++)
{
//cout << '[' << st2[i].second+1 << endl;
if(q2.top() > 0) cout << i << "#############\n";
s = M[st2[i].second].s;
t = M[st2[i].second].t;
if(s>t) swap(s,t);
if(s <= -q2.top() && t >= q1.top())
{
//cout << '!';
q1.push(s);
q2.push(-t);
s1 += s;
s2 += t;
//cout << s1 << ' ' << s2 << endl;
}
else if(t < q1.top())
{
//cout << '?';
q2.push(-q1.top());
s2 += q1.top();
s1 -= q1.top();
q1.pop();
q1.push(s);
q1.push(t);
s1+= t+s;
}
else if(s > -q2.top())
{
//cout << '/';
if(-q2.top() < 0) cout << "@@@@@@@@@@@@@@";
q1.push(-q2.top());
s1 += -q2.top();
s2 -= -q2.top();
q2.pop();
q2.push(-s);
q2.push(-t);
s2+= t+s;
}
sumos_kaire[i] = -s1+s2;
//if(i == n-2) cout << '{' << s1 << ' ' << s2 << endl;
//cout << sumos_kaire[i] << ' ';
}
/// desine puse
while(!q1.empty())q1.pop();
while(!q2.empty())q2.pop();
s1 = 0;
s2 = 0;
s = M[st2[n-1].second].s;
t = M[st2[n-1].second].t;
//cout << "!!!!!!" << st2[n-1].first << endl;
if(s>t) swap(s, t);
q1.push(s);
q2.push(-t);
s1 += s;
s2 += t;
sumos_desine[n-2] = -s1+s2;
//cout << sumos_desine[n-2] << ' ';
//cout << ']' << s1 << ' ' << s2 << endl;
for(int i = n-2; i>=1; i--)
{
//cout << "!!!!!!" << st2[i].first << endl;
s = M[st2[i].second].s;
t = M[st2[i].second].t;
if(s>t) swap(s,t);
if(s <= -q2.top() && t >= q1.top())
{
//cout << '!';
q1.push(s);
q2.push(-t);
s1 += s;
s2 += t;
//cout << s1 << ' ' << s2 << endl;
}
else if(t < q1.top())
{
//cout << '?';
q2.push(-q1.top());
s2 += q1.top();
s1 -= q1.top();
q1.pop();
q1.push(s);
q1.push(t);
s1+= t+s;
}
else if(s > -q2.top())
{
//cout << '/';
q1.push(-q2.top());
s1 += -q2.top();
s2 -= -q2.top();
q2.pop();
q2.push(s);
q2.push(t);
s2+= t+s;
}
sumos_desine[i-1] = -s1+s2;
//cout << sumos_desine[i-1] << ' ';
}
for(int i = 0; i<n-1; i++)
{
galats = min(galats, sumos_kaire[i] + sumos_desine[i]);
}
}
for(int i = 0; i<nereikalingi.size(); i++)
{
int j = nereikalingi[i];
galats += abs(M[j].s - M[j].t);
}
cout << galats + reikalingi.size();
}
return 0;
}
/*
2 4
A 1 B 6
A 5 B 3
A 8 B 7
A 10 B 10
2 2
A 10 B 5
A 1 B 1
2 3
A 10 B 5
A 6 B 8
A 1 B 1
2 4
A 10 B 5
A 6 B 8
A 3 B 4
A 1 B 1
*/
Compilation message
bridge.cpp: In function 'long long int skaiciuok_keliu_suma(int, int)':
bridge.cpp:32:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
32 | for(int i = 0; i<reikalingi.size(); i++)
| ~^~~~~~~~~~~~~~~~~~
bridge.cpp:40:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
40 | for(int f = 0; f<reikalingi.size(); f++)
| ~^~~~~~~~~~~~~~~~~~
bridge.cpp:49:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
49 | for(int i = 0; i<nereikalingi.size(); i++)
| ~^~~~~~~~~~~~~~~~~~~~
bridge.cpp: In function 'int main()':
bridge.cpp:94:27: error: 'A' was not declared in this scope
94 | galats = daug;A
| ^
bridge.cpp:226:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
226 | for(int i = 0; i<nereikalingi.size(); i++)
| ~^~~~~~~~~~~~~~~~~~~~
