이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include<bits/stdc++.h>
using namespace std;
#define jizz ios_base::sync_with_stdio(false);cin.tie(NULL);
typedef long long ll;
typedef pair<int,int> pii;
#define F first
#define S second
#define ALL(x) (x).begin(),(x).end()
#define pb push_back
#define mkp make_pair
bool cmp(pii a, pii b){
return a.F+b.F<a.S+b.S;
}
int abs(int x){
return x>0?x:-x;
}
vector<pii> segs;
vector<int> pos;
int main(){ jizz
int k, n;
cin>>k>>n;
ll tmp=0;
for(int i=0;i<n;i++){
char p, q;
int s, t;
cin>>p>>s>>q>>t;
if(s>t) swap(s,t);
tmp+=(t-s);
if(p!=q) {
tmp++;
segs.pb(mkp(s,t));
pos.pb(s);
pos.pb(t);
}
}
ll ans1=tmp, ans2=tmp;
if(pos.empty()){
cout<<tmp<<"\n";
return 0;
}
sort(ALL(pos));
sort(ALL(segs),cmp);
int sz=segs.size();
int bp=pos[sz];
for(int i=0;i<sz;i++){
if(segs[i].S<bp) ans1+=2*(bp-segs[i].S);
else if(segs[i].F>bp) ans1+=2*(segs[i].F-bp);
}
int idx=0;
for(int i=0;i<sz;i++){
ll res=tmp;
int cut=(segs[i].F+segs[i].S)/2;
while(idx<2*sz&&pos[idx]<cut) idx++;
int bp1=idx/2, bp2=(2*sz+idx)/2;
for(int j=0;j<sz;j++){
if(j<i){
if(segs[i].S<bp1) res+=2*(bp1-segs[i].S);
else if(segs[i].F>bp1) res+=2*(segs[i].F-bp1);
} else{
if(segs[i].S<bp2) res+=2*(bp2-segs[i].S);
else if(segs[i].F>bp2) res+=2*(segs[i].F-bp2);
}
}
//cout<<i<<" "<<res<<"\n";
ans2=min(ans2,res);
}
if(k==1) cout<<ans1<<"\n";
else cout<<min(ans1,ans2)<<"\n";
return 0;
}
/*
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
*/
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