Submission #798017

#	Time	Username	Problem	Language	Result	Execution time	Memory
798017		mrwang	Pinball (JOI14_pinball)	C++14	100 / 100	199 ms	15992 KiB

pinball

#include<bits/stdc++.h>
#define TASKNAME "codeforce"
#define pb push_back
#define pli pair<int,int>
#define fi first
#define se second
#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL);
using namespace std;
using ll=long long;
const ll maxN=2e5;
const ll inf=1e18;
const ll mod=1e9+7;
ll st[4*maxN];
ll n;
void update(ll pos,ll val,ll id=1,ll l=1,ll r=n+2)
{
    if(l==r)
    {
        st[id]=min(st[id],val);
        return;
    }
    ll mid=l+r>>1;
    if(pos<=mid) update(pos,val,id*2,l,mid);
    else update(pos,val,id*2+1,mid+1,r);
    st[id]=min(st[id*2],st[id*2+1]);
}
ll get(ll i,ll j,ll id=1,ll l=1,ll r=n+2)
{
    if(j<l||r<i) return inf;
    if(i<=l&&r<=j) return st[id];
    ll mid=l+r>>1;
    return min(get(i,j,id*2,l,mid),get(i,j,id*2+1,mid+1,r));
}
ll dp[2][maxN],a[maxN],c[maxN],d[maxN],e[maxN],b[maxN];
void cal(ll x,ll t)
{
    dp[t][0]=0;
    c[0]=x;
    fill(st,st+4*maxN,inf);
    for(int i=0;i<=n;i++)
    {
        if(i!=0)
        {
            dp[t][i]=inf;
            ll l,r;
            l=lower_bound(e+1,e+n+3,a[i])-e;
            r=upper_bound(e+1,e+n+3,b[i])-e-1;
            dp[t][i]=min(dp[t][i],get(l,r)+d[i]);
        }
        ll pos=lower_bound(e+1,e+n+3,c[i])-e;
        update(pos,dp[t][i]);
     }
}
ll m,sz=0;
void solve()
{
    cin >> n >> m;
    for(int i=1;i<=n;i++) cin >> a[i] >> b[i] >> c[i] >> d[i],e[++sz]=c[i];
    e[n+1]=1;
    e[n+2]=m;
    sort(e+1,e+n+3);
    cal(1,0);
    cal(m,1);
    ll ans=inf;
    for(int i=1;i<=n;i++)
    {
        ans=min(ans,dp[0][i]+dp[1][i]-d[i]);
    }
    if(ans!=inf) cout << ans;
    else cout << -1;
}
int main()
{
    fastio
    //freopen(TASKNAME".INP","r",stdin);
    //freopen(TASKNAME".OUT","w",stdout);
    solve();
}

Compilation message (stderr)

pinball.cpp: In function 'void update(ll, ll, ll, ll, ll)':
pinball.cpp:22:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   22 |     ll mid=l+r>>1;
      |            ~^~
pinball.cpp: In function 'll get(ll, ll, ll, ll, ll)':
pinball.cpp:31:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   31 |     ll mid=l+r>>1;
      |            ~^~

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