# | 제출 시각 | 아이디 | 문제 | 언어 | 결과 | 실행 시간 | 메모리 |
---|---|---|---|---|---|---|---|
979925 | vjudge1 | Closing Time (IOI23_closing) | C++17 | 0 ms | 0 KiB |
이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <bits/stdc++.h>
#define endl '\n'
#define mp make_pair
#define pb push_back
#define f first
#define s second
#define fo(i,n) for(auto i =0 ; i < n;i++)
#define fore(i,l,r) for(auto i = l; i < r;i++)
#define forex(i,r,l) for(auto i = r; i >= l; i--)
#define ffo(i,n) forex(i,n-1,0)
#define all(x) x.begin(),x.end()
#define lsb(x) x&(-x)
#define sz(x) (int)x.size()
#define gcd(a,b) __gcd(a,b)
#define vii vector<ii>
using namespace std;
using ll = long long; using ull = unsigned long long;
using vi = vector<ll>;using ii = pair<ll,ll>;using mii = map<ll,ll>;
#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
int max_score(int n, int x, int y, ll k, int u[], int v[], int w[]){
ll suf[n+1]{}, pre[n+1]{};
fore(i,1,n)pre[i] = (i ? w[i-1] : 0) + (i ? pre[i-1] : 0);
ffo(i,n-1)suf[i] = w[i] + suf[i+1];
ll c[n+1]{};
ll ans = 0, tot= 0;
for(ll i=x;i>=0;i--){
ans+=suf[i] - suf[x];
for(ll j=x;j <=n-1;j++){
ans+=pre[j]-pre[x];
for(ll l=y;l>=0;l--){
if(l>j)ans+=suf[l]- suf[y];
else{
if(l>x){ans+=max(suf[l]-suf[y], pre[l] - pre[x]);ans-=min(suf[l]-suf[y], pre[l] - pre[x]);}
else ans+=suf[l]-suf[y];
}
for(ll lk=y;lk<=n-1;lk++){
if(j<lk)ans+=pre[lk]-pre[y];
// cout << i << " " << j << " " << l << " " << lk << " " << ans << endl;
if(ans<=k)tot = max(tot,j-i+1 + lk-l+1);
}
for(ll lk=y;lk<=n-1;lk++)
if(j<lk)ans-=pre[lk] - pre[y];
}
for(ll l =y;l>=0;l--){
if(l>j)ans-=suf[l]- suf[y];
else{
if(l>x){ans-=max(suf[l]-suf[y], pre[l] - pre[x]);ans+=min(suf[l]-suf[y], pre[l] - pre[x]);}
else ans-=suf[l]-suf[y];
}
}
// cout<<ans<<endl;
}
for(ll j =x;j<=n-1;j++)
ans-=pre[j]-pre[x];
}
return tot;
}
void test_case(){
int n; cin >> n;
int X,Y;cin >> X >> Y;
ll K; cin >> K;
int u[n], v[n], w[n];
fo(i,n){
cin >> u[i] >> v[i] >> w[i];
}
cout << max_score(n,X,Y, K, u,v,w) << endl;
}
int main(){cin.tie(0)->sync_with_stdio(0);
srand(time(nullptr));
int t =1;
// cin >> t;
while(t--)test_case();
}