oj.uz

답안 #744267

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
744267 2023-05-18T10:11:41 Z onebit1024 Bigger segments (IZhO19_segments) C++17
73 / 100
 1500 ms 21868 KB 
#include <bits/stdc++.h>
using namespace std;
 
#define int long long
#define pb push_back
#define all(c) c.begin(), c.end()
#define endl "\n"
 
const double PI=3.141592653589;
 
 
void __print(int x) {cerr << x;}
void __print(long x) {cerr << x;}
void __print(unsigned x) {cerr << x;}
void __print(unsigned long x) {cerr << x;}
void __print(unsigned long long x) {cerr << x;}
void __print(float x) {cerr << x;}
void __print(double x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << '\'' << x << '\'';}
void __print(const char *x) {cerr << '\"' << x << '\"';}
void __print(const string &x) {cerr << '\"' << x << '\"';}
void __print(bool x) {cerr << (x ? "true" : "false");}
 
template<typename T, typename V>
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? "," : ""), __print(i); cerr << "}";}
void _print() {cerr << "]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
#ifndef ONLINE_JUDGE
#define dbg(x...) cerr << "LINE(" << __LINE__ << ") -> " <<"[" << #x << "] = ["; _print(x)
#else
#define dbg(x...)
#endif
 
int n;
vector<int>a,pref;
struct segtree{
    int sz = 1;
    vector<int>seg,lazy;
    void init(int n){
        while(sz < n)sz*=2;
        seg = vector<int>(sz*2);
        lazy = vector<int>(sz*2);
    }
 
    void upd(int x, int lx, int rx, int l, int r, int v){
        // range add v
        if(lazy[x]){
            seg[x]+=lazy[x];
            if(rx-lx > 1){
                lazy[2*x+1]+=lazy[x];
                lazy[2*x+2]+=lazy[x];
            }
            lazy[x] = 0;
        }
        if(lx >= l && rx <= r){
            seg[x] += v;
            if(rx-lx > 1){
                lazy[2*x+1]+=v;
                lazy[2*x+2]+=v;
            }
            return;
        
        }
        if(rx <= l || lx >= r)return;
        int m = (lx+rx)/2;
        upd(2*x+1,lx,m,l,r,v);
        upd(2*x+2,m,rx,l,r,v);
        seg[x] = min(seg[2*x+1],seg[2*x+2]);
    }
 
    void upd(int l, int r, int v){
        upd(0,0,sz,l,r,v);
    }
 
    int sol(int x, int lx, int rx, int l, int r){
        if(lazy[x]){
            seg[x]+=lazy[x];
            if(rx-lx > 1){
                lazy[2*x+1]+=lazy[x];
                lazy[2*x+2]+=lazy[x];
            }
            lazy[x] = 0;
        }
 
        if(seg[x] > 0 || lx >= r || rx <= l)return -1;
        if(rx-lx == 1)return lx;
        int m = (lx+rx)/2;
        int res = sol(2*x+2,m,rx,l,r);
        if(res==-1)res = sol(2*x+1,lx,m,l,r);
        return res;
    }
 
    int sol(int l, int r){
        // find first elmeent <= 0 in range [l,r]
        return sol(0,0,sz,l,r);
    }
};
segtree st;
int f(int x){
    vector<pair<int,int>>dp(n+1);
    
    vector<int>mn(n+5,0);
    // pref[i]-pref[j]-dp[j].second >= 0
    // pref[i] >= pref[j]+dp[j].second;
    int pos = 0;
    for(int i = 1;i<=n;++i){
        dp[i].second = dp[i-1].second+a[i];

        if(dp[i].second >= x){
            pos = i;
            dp[i].first = 1;
            int val = lower_bound(all(pref),pref[i]+dp[i].second)-pref.begin();
            if(val <= n)mn[val] = max(mn[val],i);
            break;
        }
    }
    if(pos==0)return 0;
    // pos denotes starting position of maxdp value so far
    vector<pair<int,int>>p;
    for(int i = pos+1;i<=n;++i){ 
        dp[i] = {dp[i-1].first,dp[i-1].second+a[i]};

        pair<int,int>get = {dp[mn[i]].first+1,pref[i]-pref[mn[i]]};
        if(get.first > dp[i].first || (get.first==dp[i].first && get.second < dp[i].second))dp[i] = get;
        int val = lower_bound(all(pref),pref[i]+dp[i].second)-pref.begin();
        if(val <= n)mn[val] = i;


    }
    return dp[n].first;
}
void solve()
{
    cin >> n;
    a.resize(n+1);
    pref.resize(n+1);
    for(int i = 1;i<=n;++i)cin >> a[i];
    for(int i = 1;i<=n;++i)pref[i] = pref[i-1]+a[i];
 
    
    int l = 1, r = 1e18;
    while(l+2 < r){
        int m1 = (l+(r-l)/3), m2 = (r-(r-l)/3);
        if(f(m1) < f(m2))l = m1;
        else r = m2;
    }
    
    int res = 0;
    for(int i = l;i<=r;++i)res = max(res, f(i));
    cout << res << endl;
}   
 
int32_t main()
{
 
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
 
 
    // freopen("input.txt", "r", stdin);
    // freopen("output.txt", "w", stdout);
    
 
    int T=1;
    for(int i = 1;i<=T;++i)
    {
        // cout << "Case #" << i << ": ";
        solve();
    }
}

Subtask #1
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 324 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 324 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 2 ms 340 KB Output is correct
17 Correct 3 ms 340 KB Output is correct
18 Correct 2 ms 340 KB Output is correct
19 Correct 3 ms 324 KB Output is correct
20 Correct 2 ms 340 KB Output is correct
21 Correct 3 ms 340 KB Output is correct
22 Correct 2 ms 340 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 3 ms 340 KB Output is correct
26 Correct 2 ms 212 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 212 KB Output is correct
29 Correct 2 ms 316 KB Output is correct
30 Correct 2 ms 316 KB Output is correct

Subtask #3
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 324 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 2 ms 340 KB Output is correct
17 Correct 3 ms 340 KB Output is correct
18 Correct 2 ms 340 KB Output is correct
19 Correct 3 ms 324 KB Output is correct
20 Correct 2 ms 340 KB Output is correct
21 Correct 3 ms 340 KB Output is correct
22 Correct 2 ms 340 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 3 ms 340 KB Output is correct
26 Correct 2 ms 212 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 212 KB Output is correct
29 Correct 2 ms 316 KB Output is correct
30 Correct 2 ms 316 KB Output is correct
31 Correct 6 ms 340 KB Output is correct
32 Correct 10 ms 440 KB Output is correct
33 Correct 15 ms 396 KB Output is correct
34 Correct 12 ms 464 KB Output is correct
35 Correct 19 ms 340 KB Output is correct
36 Correct 20 ms 384 KB Output is correct
37 Correct 17 ms 384 KB Output is correct
38 Correct 13 ms 420 KB Output is correct
39 Correct 9 ms 340 KB Output is correct
40 Correct 19 ms 464 KB Output is correct
41 Correct 8 ms 340 KB Output is correct
42 Correct 9 ms 340 KB Output is correct
43 Correct 7 ms 340 KB Output is correct
44 Correct 11 ms 340 KB Output is correct
45 Correct 11 ms 340 KB Output is correct

Subtask #4
36.0 / 36.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 324 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 2 ms 340 KB Output is correct
17 Correct 3 ms 340 KB Output is correct
18 Correct 2 ms 340 KB Output is correct
19 Correct 3 ms 324 KB Output is correct
20 Correct 2 ms 340 KB Output is correct
21 Correct 3 ms 340 KB Output is correct
22 Correct 2 ms 340 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 3 ms 340 KB Output is correct
26 Correct 2 ms 212 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 212 KB Output is correct
29 Correct 2 ms 316 KB Output is correct
30 Correct 2 ms 316 KB Output is correct
31 Correct 6 ms 340 KB Output is correct
32 Correct 10 ms 440 KB Output is correct
33 Correct 15 ms 396 KB Output is correct
34 Correct 12 ms 464 KB Output is correct
35 Correct 19 ms 340 KB Output is correct
36 Correct 20 ms 384 KB Output is correct
37 Correct 17 ms 384 KB Output is correct
38 Correct 13 ms 420 KB Output is correct
39 Correct 9 ms 340 KB Output is correct
40 Correct 19 ms 464 KB Output is correct
41 Correct 8 ms 340 KB Output is correct
42 Correct 9 ms 340 KB Output is correct
43 Correct 7 ms 340 KB Output is correct
44 Correct 11 ms 340 KB Output is correct
45 Correct 11 ms 340 KB Output is correct
46 Correct 260 ms 4616 KB Output is correct
47 Correct 452 ms 4708 KB Output is correct
48 Correct 655 ms 5064 KB Output is correct
49 Correct 859 ms 5164 KB Output is correct
50 Correct 810 ms 5212 KB Output is correct
51 Correct 869 ms 5220 KB Output is correct
52 Correct 423 ms 2764 KB Output is correct
53 Correct 268 ms 1780 KB Output is correct
54 Correct 385 ms 4452 KB Output is correct
55 Correct 825 ms 5224 KB Output is correct
56 Correct 516 ms 4712 KB Output is correct
57 Correct 428 ms 4652 KB Output is correct
58 Correct 466 ms 4692 KB Output is correct
59 Correct 591 ms 4820 KB Output is correct
60 Correct 649 ms 4820 KB Output is correct

Subtask #5
0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 324 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 2 ms 340 KB Output is correct
17 Correct 3 ms 340 KB Output is correct
18 Correct 2 ms 340 KB Output is correct
19 Correct 3 ms 324 KB Output is correct
20 Correct 2 ms 340 KB Output is correct
21 Correct 3 ms 340 KB Output is correct
22 Correct 2 ms 340 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 3 ms 340 KB Output is correct
26 Correct 2 ms 212 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 212 KB Output is correct
29 Correct 2 ms 316 KB Output is correct
30 Correct 2 ms 316 KB Output is correct
31 Correct 6 ms 340 KB Output is correct
32 Correct 10 ms 440 KB Output is correct
33 Correct 15 ms 396 KB Output is correct
34 Correct 12 ms 464 KB Output is correct
35 Correct 19 ms 340 KB Output is correct
36 Correct 20 ms 384 KB Output is correct
37 Correct 17 ms 384 KB Output is correct
38 Correct 13 ms 420 KB Output is correct
39 Correct 9 ms 340 KB Output is correct
40 Correct 19 ms 464 KB Output is correct
41 Correct 8 ms 340 KB Output is correct
42 Correct 9 ms 340 KB Output is correct
43 Correct 7 ms 340 KB Output is correct
44 Correct 11 ms 340 KB Output is correct
45 Correct 11 ms 340 KB Output is correct
46 Correct 260 ms 4616 KB Output is correct
47 Correct 452 ms 4708 KB Output is correct
48 Correct 655 ms 5064 KB Output is correct
49 Correct 859 ms 5164 KB Output is correct
50 Correct 810 ms 5212 KB Output is correct
51 Correct 869 ms 5220 KB Output is correct
52 Correct 423 ms 2764 KB Output is correct
53 Correct 268 ms 1780 KB Output is correct
54 Correct 385 ms 4452 KB Output is correct
55 Correct 825 ms 5224 KB Output is correct
56 Correct 516 ms 4712 KB Output is correct
57 Correct 428 ms 4652 KB Output is correct
58 Correct 466 ms 4692 KB Output is correct
59 Correct 591 ms 4820 KB Output is correct
60 Correct 649 ms 4820 KB Output is correct
61 Execution timed out 1511 ms 21868 KB Time limit exceeded
62 Halted 0 ms 0 KB -