Submission #729640

#	Time	Username	Problem	Language	Result	Execution time	Memory
729640		myrcella	Pinball (JOI14_pinball)	C++17	100 / 100	425 ms	38732 KiB

pinball

//by szh
#include<bits/stdc++.h>
using namespace std;

#define fi first
#define se second
#define pii pair<int,int>
#define pll pair<long long,long long>
#define pb push_back
#define debug(x) cerr<<#x<<"="<<x<<endl
#define pq priority_queue
#define inf 0x3f
#define rep(i,a,b) for (int i=a;i<(b);i++)
#define MP make_pair
#define SZ(x) (int(x.size()))
#define ll long long
#define mod 1000000007
#define ALL(x) x.begin(),x.end()
void inc(int &a,int b) {a=(a+b)%mod;}
void dec(int &a,int b) {a=(a-b+mod)%mod;}
int lowbit(int x) {return x&(-x);}
ll p0w(ll base,ll p) {ll ret=1;while(p>0){if (p%2ll==1ll) ret=ret*base%mod;base=base*base%mod;p/=2ll;}return ret;}

const int maxn = 3e5+10;

int n,m;
map <int,int> mp;
int a[maxn],b[maxn],c[maxn],d[maxn];
pll tree[maxn*4];
ll big = 1e18;

void update(int c,int cl,int cr,int pos,pll val) {
	if (cl==cr) tree[c].fi = min(val.fi,tree[c].fi),tree[c].se = min(val.se,tree[c].se);
	else {
		int mid=cl+cr>>1;
		if (pos<=mid) update(c<<1,cl,mid,pos,val);
		else update(c<<1|1,mid+1,cr,pos,val);
		tree[c].fi = min(tree[c<<1].fi,tree[c<<1|1].fi);
		tree[c].se = min(tree[c<<1].se,tree[c<<1|1].se);
	}
}

pll query(int c,int cl,int cr,int l,int r) {
	if (l<=cl and cr<=r) return tree[c];
	int mid = cl+cr>>1;
	pll ret = {big,big};
	if (l<=mid) ret = query(c<<1,cl,mid,l,r);
	if (r>mid) {
		pll tmp = query(c<<1|1,mid+1,cr,l,r);
		ret.fi = min(ret.fi,tmp.fi);
		ret.se = min(ret.se,tmp.se);
	}
	return ret;
}

int main() {
//	freopen("input.txt","r",stdin);	
	std::ios::sync_with_stdio(false);cin.tie(0);
	cin>>n>>m;
	ll ans = big;
	rep(i,0,maxn*4) tree[i] = {big,big};
	mp[1] = mp[m] = 1;
	rep(i,0,n) {
		cin>>a[i]>>b[i]>>c[i]>>d[i];
		mp[a[i]]=1,mp[b[i]]=1,mp[c[i]]=1;
	}
	int tot = 0;
	for (auto &it:mp) it.se=++tot;
	rep(i,0,n) a[i] = mp[a[i]], b[i] = mp[b[i]], c[i] = mp[c[i]];
	rep(i,0,n) {
		pll tmp = query(1,1,tot,a[i],b[i]);
//		debug(tmp.se);
		pll cur = {big,big};
		if (a[i]==1) cur.fi=d[i];
		else cur.fi = tmp.fi + d[i];
		if (b[i]==tot) cur.se = d[i];
		else cur.se = tmp.se + d[i];
		if (cur.fi < big or cur.se<big) {
			update(1,1,tot,c[i],cur);
			ans = min(ans,cur.fi+cur.se-d[i]);
		}
//		debug(c[i]),debug(cur.fi),debug(cur.se);
	}
	if (ans==big) cout<<-1;
	else cout<<ans;
	return 0;
}

Compilation message (stderr)

pinball.cpp: In function 'void update(int, int, int, int, std::pair<long long int, long long int>)':
pinball.cpp:35:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   35 |   int mid=cl+cr>>1;
      |           ~~^~~
pinball.cpp: In function 'std::pair<long long int, long long int> query(int, int, int, int, int)':
pinball.cpp:45:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   45 |  int mid = cl+cr>>1;
      |            ~~^~~

• Subtask 1: 11 / 11
• Subtask 2: 18 / 18
• Subtask 3: 22 / 22
• Subtask 4: 49 / 49