This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
#define f first
#define s second
#define pb push_back
#define mp make_pair
#define all(v) v.begin(), v.end()
#define sz(v) (int)v.size()
#define MOO(i, a, b) for(int i=a; i<b; i++)
#define M00(i, a) for(int i=0; i<a; i++)
#define MOOd(i,a,b) for(int i = (b)-1; i >= a; i--)
#define M00d(i,a) for(int i = (a)-1; i>=0; i--)
#define FAST ios::sync_with_stdio(0); cin.tie(0);
#define finish(x) return cout << x << '\n', 0;
#define dbg(x) cerr << ">>> " << #x << " = " << x << "\n";
#define _ << " _ " <<
typedef long long ll;
typedef long double ld;
typedef vector<int> vi;
typedef pair<int,int> pi;
typedef pair<ld,ld> pd;
typedef complex<ld> cd;
const int MAX_N = 100100;
int k, n;
vector<pi> arr;
map<int,vector<pi>> startsAt;
map<int,vector<pi>> endsAt;
vi points;
ll getMinDis1() {
ll cur = 0;
ll numBefore = 0;
ll numAfter = 0;
for(pi p: arr) if(p.f > points[0]) {
numAfter++;
cur += p.f - points[0];
}
ll ans = cur;
MOO(i, 1, sz(points)) {
cur -= numAfter*(points[i] - points[i-1]);
for(pi p: startsAt[points[i]]) {
numAfter--;
}
for(pi p: endsAt[points[i-1]]) {
numBefore++;
}
cur += numBefore*(points[i] - points[i-1]);
ans = min(ans, cur);
}
return ans;
}
ll getMinDis2() {
return 0;
}
int main() { FAST
cin >> k >> n;
int cnt = 0;
ll ans = 0;
M00(i, n) {
string s1, s2;
int i1, i2;
cin >> s1 >> i1 >> s2 >> i2;
if(i1 > i2) swap(i1, i2);
if(s1 == s2) {
ans += (i2-i1);
} else {
cnt++;
ans += (i2-i1);
arr.pb(mp(i1,i2));
if(!startsAt.count(i1)) startsAt[i1].clear();
startsAt[i1].pb(mp(i1,i2));
if(!endsAt.count(i2)) endsAt[i2].clear();
endsAt[i2].pb(mp(i1,i2));
points.pb(i1);
points.pb(i2);
}
}
sort(all(points));
points.erase(unique(all(points)), points.end());
if(k == 1) {
ans += getMinDis1()*2LL + cnt;
} else {
ans += getMinDis2()*2LL + cnt;
}
finish(ans);
}
Compilation message (stderr)
bridge.cpp: In function 'll getMinDis1()':
bridge.cpp:46:16: warning: variable 'p' set but not used [-Wunused-but-set-variable]
for(pi p: startsAt[points[i]]) {
^
bridge.cpp:49:16: warning: variable 'p' set but not used [-Wunused-but-set-variable]
for(pi p: endsAt[points[i-1]]) {
^
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