Submission #404565

#	Time	Username	Problem	Language	Result	Execution time	Memory
404565		cpp219	Semiexpress (JOI17_semiexpress)	C++14	100 / 100	2 ms	460 KiB

semiexpress

#pragma GCC optimization "O2"
#pragma GCC optimization "unroll-loop"
#pragma GCC target ("avx2")

#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define fs first
#define sc second
using namespace std;
const ll N = 3e3 + 16;
const ll Log2 = 19;
const ll inf = 1e9 + 7;
typedef pair<ll,ll> LL;
///Road to EF/M
set<ll> place;

struct point{
    ll pot,pos,t;
};

bool operator < (point a,point b){
    return a.pot < b.pot;
}
priority_queue<point> pq;

ll n,m,k,T,A,C,B,S[N],ans;
ll cur;

ll Cal_pot(ll pos,ll tg){
    ll nxt = *place.upper_bound(pos); //cout<<nxt; exit(0);
    ll inc = min(nxt - pos - 1,(T - tg)/A);
    return inc + 1;
}

void out(priority_queue<point> p){
    while(!p.empty()){
        point now = p.top(); p.pop();
        cout<<now.pot<<" "<<now.pos<<" "<<now.t<<"\n";
    }
    exit(0);
}

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0), cout.tie(0);
    #define task "tst"
    if (fopen(task".inp", "r")){
        freopen(task".inp", "r", stdin);
        //freopen(task".out", "w", stdout);
    }
    cin>>n>>m>>k>>A>>B>>C>>T; k -= m;
    for (ll i = 1;i <= m;i++) cin>>S[i],place.insert(S[i]);
    for (ll i = 1;i <= m;i++){
        if (cur > T) break;
        if (i == m){
            ans++; break;
        }
        ll inc = min(S[i + 1] - S[i] - 1,(T - cur)/A);
        //cout<<cur<<"\n"; //exit(0);
        ans += inc + 1; inc++;
        if (S[i] + inc< S[i + 1] && cur + C*inc <= T)
            pq.push({Cal_pot(S[i] + inc,cur + C*inc),S[i] + inc,cur + C*inc});
        cur += B*(S[i + 1] - S[i]);
    }
    ans--; //out(pq);
    //cout<<ans; return 0;
    while(k-- && !pq.empty()){
        point now = pq.top(); pq.pop();
        ans += now.pot; place.insert(now.pos);
        ll nxt = *place.upper_bound(now.pos),cand = now.pos + now.pot,inc = now.pot;
        if (cand < nxt && now.t + C*inc <= T)
            pq.push({Cal_pot(cand,now.t + C*inc),cand,now.t + C*inc});
    }
    cout<<ans;
}

Compilation message (stderr)

semiexpress.cpp:1: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    1 | #pragma GCC optimization "O2"
      | 
semiexpress.cpp:2: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    2 | #pragma GCC optimization "unroll-loop"
      | 
semiexpress.cpp: In function 'int main()':
semiexpress.cpp:49:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   49 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 18 / 18
• Subtask 2: 30 / 30
• Subtask 3: 52 / 52