Submission #985724

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
985724	2024-05-18 15:03:54	gggkik	Feast (NOI19_feast)	C++14	71 / 100	126 ms	153120 KiB

feast

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#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<ll,ll>;
const ll inf = 1e18;
const int MXN = 3e5+5;
struct node{
    pii l, r; // v, pos
    pair<ll,pii> m;
    ll a;
}t[MXN<<2], nt[MXN<<2];
int A[MXN], lz[MXN];
node operator+(const node &i, const node &j){
    node k;
    k.l = max(i.l,{i.a+j.l.first,j.l.second});
    k.r = max(j.r,{i.r.first+j.a,i.r.second});
    k.m = max(i.m,j.m);
    k.m = max(k.m,{i.r.first+j.l.first,{i.r.second,j.l.second}});
    k.a = i.a+j.a;
    return k;
}
void push(int x,int s,int e){
    if(!lz[x]) return;
    swap(t[x],nt[x]);
    if(s!=e){
        lz[x*2] ^= lz[x];
        lz[x*2+1] ^= lz[x];
    }
    lz[x] = 0;
}
 
 
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Compilation message (stderr)

feast.cpp: In function 'void upd(int, int, int, int, int)':
feast.cpp:38:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   38 |     int mid = s+e>>1;
      |               ~^~
feast.cpp: In function 'void init(int, int, int)':
feast.cpp:50:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   50 |     int mid = s+e>>1;
      |               ~^~
feast.cpp: In function 'int main()':
feast.cpp:62:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   62 |         auto [l,r] = t[1].m.second;
      |              ^

• Subtask 1: 4 / 4
• Subtask 2: 8 / 8
• Subtask 3: 18 / 18
• Subtask 4: 10 / 10
• Subtask 5: 11 / 11
• Subtask 6: 20 / 20
• Subtask 7: 0 / 29