Submission #373122

#	Time	Username	Problem	Language	Result	Execution time	Memory
373122		cpp219	코알라 (JOI13_koala)	C++14	100 / 100	194 ms	12520 KiB

koala

#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")

#include<bits/stdc++.h>
#define ll long long
#define ld long double
#define fs first
#define sc second
using namespace std;
typedef pair<ll,ll> LL;
const ll N = 1e5 + 9;
const ll inf = 1e16 + 7;

struct place{
    ll T,B,rm;
};
place a[N];
ll K,M,D,A,n,dp[N];
vector<ll> v;

void compress(){
    sort(v.begin(),v.end()); v.resize(unique(v.begin(),v.end()) - v.begin());
    for (ll i = 1;i <= n;i++){
        ll p = a[i].T % D;
        a[i].rm = lower_bound(v.begin(),v.end(),p) - v.begin() + 1;
    }
}

ll st[2][4*N];

void upd(ll cond,ll id,ll l,ll r,ll u,ll val){
    if (u < l||r < u) return;
    if (l == r){
        st[cond][id] = max(st[cond][id],val); return;
    }
    ll mid = (l + r)/2;
    upd(cond,id*2,l,mid,u,val); upd(cond,id*2 + 1,mid + 1,r,u,val);
    st[cond][id] = max(st[cond][id*2],st[cond][id*2 + 1]);
}

ll Get(ll cond,ll id,ll l,ll r,ll u,ll v){
    if (v < l||r < u) return -inf;
    if (u <= l&&r <= v) return st[cond][id];
    ll mid = (l + r)/2;
    return max(Get(cond,id*2,l,mid,u,v),Get(cond,id*2 + 1,mid + 1,r,u,v));
}
/// 1 if Ti >= Tj     0 if Ti < Tj
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>>K>>M>>D>>A>>n; a[1].T = K; a[n + 2].T = M; n += 2;
    for (ll i = 2;i < n;i++) cin>>a[i].T>>a[i].B;
    for (ll i = 1;i < 4*N;i++) st[0][i] = st[1][i] = -inf;
    for (ll i = 1;i <= n;i++) v.push_back(a[i].T % D);
    compress();
    for (ll i = 1;i <= n;i++){
        ll now = a[i].rm;
        ll kq = max(Get(1,1,1,n,1,now - 1),Get(0,1,1,n,now,n));
        dp[i] = kq - (a[i].T/D) * A; if (i == 1) dp[i] = 0;
        ll val = dp[i] + a[i].B + (a[i].T/D)*A; //cout<<val; return 0;
        upd(1,1,1,n,now,val - A); upd(0,1,1,n,now,val);
    }
    //for (ll i = 1;i <= n;i++) cout<<dp[i]<<" "; exit(0);
    cout<<dp[n];
}

Compilation message (stderr)

koala.cpp:2: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
    2 | #pragma GCC optimization ("O3")
      | 
koala.cpp:3: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
    3 | #pragma GCC optimization ("unroll-loops")
      | 
koala.cpp: In function 'int main()':
koala.cpp:54:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   54 |         freopen(task".INP","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 50 / 50