Submission #36421

#	Time	Username	Problem	Language	Result	Execution time	Memory
36421		imaxblue	Editor (BOI15_edi)	C++14	43 / 100	173 ms	22564 KiB

edi

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define mp make_pair
#define pb push_back
#define x first
#define y second
#define pii pair<int, int>
#define p3i pair<pii, int>
#define pll pair<ll, ll>
#define p3l pair<pll, ll>
#define lseg L, (L+R)/2, N*2+1
#define rseg (L+R)/2+1, R, N*2+2
#define ub upper_bound
#define lb lower_bound
#define pq priority_queue
#define MN 1000000007
#define fox(k, x) for (int k=0; k<x; ++k)
#define fox1(k, x) for (int k=1; k<=x; ++k)
#define foxr(k, x) for (int k=x-1; k>=0; --k)
#define fox1r(k, x) for (int k=x; k>0; --k)
#define ms multiset
#define flood(x) memset(x, 0x3f3f3f3f, sizeof x)
#define drain(x) memset(x, 0, sizeof x)
#define rng() (rand() >> 3)*rand()

int n, a[300005], t[300005], p[300005];
vector<pii> v, w;
vector<int> adj[300005];
bool u, b[300005];
void dfs(int N, int V){
    p[N]=V;
    fox(l, adj[N].size())
        dfs(adj[N][l], V);
}
set<pii> s;
int main(){
    scanf("%i", &n);
    fox(l, n){
        scanf("%i", &a[l]);
        if (a[l]>0){
            t[l]=a[l];
            a[l]=0;
        }
        else a[l]=-a[l];
    }
    foxr(l, n){
        u=1;
        while(!w.empty() && w.back().x>a[l] && (v.empty() || v.back().y>w.back().y)){
           adj[l].pb(w.back().y);
           w.pop_back();
        }
        if (!v.empty() && v.back().x>a[l]){
            adj[l].pb(v.back().y);
            u=0;
            v.pop_back();
        }
        if (a[l]!=0){
            if (u){
                v.pb(mp(a[l], l));
            } else {
                w.pb(mp(a[l], l));
            }
        }
    }
    fox(l, n){
        if (t[l]!=0){
            dfs(l, l);
        }
    }
    s.insert(mp(-1, 0));
    fox(l, n){
        if (b[p[l]]){
            s.erase(mp(p[l], t[p[l]]));
        } else {
            s.insert(mp(p[l], t[p[l]]));
        }
        b[p[l]]=!b[p[l]];
        //cout << p[l] << endl;
        printf("%i\n", (--s.end())->y);
    }
    return 0;
}

Compilation message (stderr)

edi.cpp: In function 'void dfs(int, int)':
edi.cpp:18:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 #define fox(k, x) for (int k=0; k<x; ++k)
                                  ^
edi.cpp:33:5: note: in expansion of macro 'fox'
     fox(l, adj[N].size())
     ^
edi.cpp: In function 'int main()':
edi.cpp:38:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%i", &n);
                    ^
edi.cpp:40:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%i", &a[l]);
                           ^

• Subtask 1: 0 / 20
• Subtask 2: 15 / 15
• Subtask 3: 28 / 28
• Subtask 4: 0 / 37