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Submission #467209

# Submission time Handle Problem Language Result Execution time Memory
467209 2021-08-22T03:32:39 Z julian33 Autobahn (COI21_autobahn) C++14
100 / 100
 102 ms 18084 KB 
#include <bits/stdc++.h>

using namespace std;

#ifdef LOCAL
#define deb(...) logger(#__VA_ARGS__, __VA_ARGS__)
template<typename ...Args>
void logger(string vars, Args&&... values) {
    cerr<<vars<<" = ";
    string delim="";
    (...,(cerr<<delim<<values,delim=", "));
    cerr<<"\n";
}
#else
#define deb(...) logger(#__VA_ARGS__, __VA_ARGS__)
template<typename ...Args>
void logger(string vars, Args&&... values) {}
#endif

#define pb push_back
#define sz(x) (int)(x.size())
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
template<typename T> inline void maxa(T& a,T b){a=max(a,b);}
template<typename T> inline void mina(T& a,T b){a=min(a,b);} 
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

const int mxN=1e6+5; //make sure this is right
const int mod=1e9+7;

struct evt{
    int p,ppl,cst;
    bool operator<(const evt &o) const{
        return p<o.p;
    }
};
ll total=0;
ll pay=0;
int nxt[mxN];

int main(){
    cin.sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    #ifdef LOCAL
        freopen("input.txt","r",stdin);
        freopen("output.txt","w",stdout);
    #endif

    int n,k,x; cin>>n>>k>>x;
    vector<evt> off,ac;
    for(int i=0;i<n;i++){
        int l,t,r; cin>>l>>t>>r;
        off.pb({l,1,0});
        off.pb({r+1,-1,0});
        if(l+t<=r){
            off.pb({l+t,0,1});
            off.pb({r+1,0,-1});
        }
    }
    sort(off.begin(),off.end());
    ac.pb(off[0]);
    for(int i=1;i<sz(off);i++){
        if(off[i].p==ac.back().p){
            ac.back().ppl+=off[i].ppl;
            ac.back().cst+=off[i].cst;
        } else{
            assert(off[i].p-1>=ac.back().p);
            nxt[sz(ac)-1]=off[i].p-1;
            ac.pb(off[i]);
        }
    }
    ll ans=0;
    ll cur=0;
    queue<pair<pii,ll>> q;
    int i=0;
    for(auto &u:ac){
        total+=u.ppl;
        pay+=u.cst;
        if(total<k){
            i++;
            continue;
        }
        deb(u.p,nxt[i],total,pay,cur);
        while(sz(q) && q.front().first.second+x<=u.p){
            cur-=q.front().second*(q.front().first.second-q.front().first.first+1);
            q.pop();
        }
        if(sz(q) && q.front().first.first+x<=u.p){
            ll overlap=q.front().second*(u.p-x-q.front().first.first+1);
            maxa(ans,cur-overlap+pay);
        } else{
            deb(cur,pay);
            maxa(ans,cur+pay);
        }
        int pre=u.p;
        u.p=nxt[i];
        while(sz(q) && q.front().first.second+x<=u.p){
            cur-=q.front().second*(q.front().first.second-q.front().first.first+1);
            q.pop();
        }
        ll amt=(ll)(u.p-pre+1)*pay;
        if(sz(q) && q.front().first.first+x<=u.p){
            ll overlap=q.front().second*(u.p-x-q.front().first.first+1);
            maxa(ans,cur-overlap+amt);
        } else{
            deb(cur,amt);
            maxa(ans,cur+amt);
        }
        q.push({{pre,u.p},pay});
        cur+=amt;
        i++;
    }
    cout<<ans<<"\n";
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 0 ms 332 KB Output is correct
8 Correct 0 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 0 ms 332 KB Output is correct
8 Correct 0 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct

Subtask #3
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 0 ms 332 KB Output is correct
8 Correct 0 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 96 ms 15164 KB Output is correct
22 Correct 97 ms 18008 KB Output is correct
23 Correct 97 ms 17916 KB Output is correct
24 Correct 99 ms 18084 KB Output is correct
25 Correct 101 ms 17932 KB Output is correct
26 Correct 99 ms 17972 KB Output is correct
27 Correct 102 ms 17888 KB Output is correct
28 Correct 102 ms 18000 KB Output is correct
29 Correct 101 ms 17912 KB Output is correct