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답안 #944797

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
944797 2024-03-13T05:07:30 Z Baizho Bigger segments (IZhO19_segments) C++17
100 / 100
 69 ms 22984 KB 
    #include <bits/stdc++.h>
    using namespace std;
    #include <ext/pb_ds/assoc_container.hpp>
    #include <ext/pb_ds/tree_policy.hpp>
    using namespace __gnu_pbds;
      
    #define ordered_set tree<int, null_type,less_equal<int>, rb_tree_tag,tree_order_statistics_node_update>
     
    // #pragma GCC optimize("Ofast,unroll-loops,fast-math")
    // #pragma GCC target("popcnt,sse3,avx")
     
     
    typedef long long ll;
    typedef unsigned long long ull;
    typedef long double ld;
    typedef pair<ll,ll> pll;
     
    #define sz size()
    #define ff first
    #define ss second
    #define all(a) a.begin(),a.end()
    #define pb push_back
     
    const int mod = ll(1e9)+7; //(b + (a%b)) % b (to mod -1%(10^9+7) correctly in c++ its -1 but its suppose to be 10^9+6
    const ll MOD = 998244353;  // (a%mod)*(binpow(b,mod-2,mod) = (a/b)%mod
    const int N = ll(5e5)+100;
    const int M = ll(2e5) + 100;
    const long long inf = 5e18;
    //const long double eps = 1e-15L;
     
    ll lcm(ll a, ll b) { return (a / __gcd(a,b))*b; }
     
    ll binpow(ll a, ll b, ll m) { ll res=1; a %= m; while(b>0){ if(b&1)res=(res * a) % m; a=(a * a) % m; b/=2; } return res%m;}
     
    void Freopen(string Key){ freopen((Key+".in").c_str(), "r", stdin); freopen((Key+".out").c_str(), "w", stdout); }

    ll n, a[N], pr[N];
    pll dp[N];

    ll getsum(ll l, ll r) {
        return pr[r] - pr[l - 1];
    }

    void Baizho() {
        cin>>n;
        for(int i = 1; i <= n; i ++) {
            cin>>a[i];
            pr[i] = pr[i - 1] + a[i];
        }
        vector<int> v;
        v.pb(0);
        for(int i = 1; i <= n; i ++) {
            int l = 0, r = v.size() - 1, j = -1;
            while(l <= r) {
                int mid = (l + r) / 2;
                if(dp[v[mid]].ss + pr[v[mid]] <= pr[i]) l = mid + 1, j = v[mid];
                else r = mid - 1;
            }
            dp[i].ff = dp[j].ff + 1;
            dp[i].ss = getsum(j + 1, i);
            while(dp[v.back()].ss + pr[v.back()] >= dp[i].ss + pr[i]) v.pop_back();
            v.pb(i);
            // for(int j = i; j >= 1; j --) {
            //     if(dp[j - 1].ff + 1 == dp[i].ff && dp[j - 1].ss <= getsum(j, i)) dp[i].ss = min(dp[i].ss, getsum(j, i));
            //     else if(dp[j - 1].ff + 1 > dp[i].ff && dp[j - 1].ss <= getsum(j, i)) dp[i] = {dp[j - 1].ff + 1, getsum(j, i)};
            // }

            // if(dp[i - 1].ff > dp[i].ff) assert(0);
        }
        cout<<dp[n].ff<<"\n";
    }
     
    signed main() {     
    //  Freopen("nondec");
        ios_base::sync_with_stdio(false);   
        cin.tie(0);cout.tie(0); 
        // precalc();
        
        int ttt = 1;
       // cin>>ttt;
     
        for(int i=1; i<=ttt; i++) {Baizho(); }
    }

Compilation message

segments.cpp: In function 'void Freopen(std::string)':
segments.cpp:35:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 |     void Freopen(string Key){ freopen((Key+".in").c_str(), "r", stdin); freopen((Key+".out").c_str(), "w", stdout); }
      |                               ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
segments.cpp:35:80: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 |     void Freopen(string Key){ freopen((Key+".in").c_str(), "r", stdin); freopen((Key+".out").c_str(), "w", stdout); }
      |                                                                         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2392 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2392 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2392 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2392 KB Output is correct
16 Correct 1 ms 2392 KB Output is correct
17 Correct 1 ms 2392 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Correct 0 ms 2396 KB Output is correct
21 Correct 1 ms 2396 KB Output is correct
22 Correct 1 ms 2396 KB Output is correct
23 Correct 1 ms 2396 KB Output is correct
24 Correct 1 ms 2392 KB Output is correct
25 Correct 1 ms 2396 KB Output is correct
26 Correct 1 ms 2396 KB Output is correct
27 Correct 1 ms 2396 KB Output is correct
28 Correct 1 ms 2440 KB Output is correct
29 Correct 1 ms 2396 KB Output is correct
30 Correct 1 ms 2396 KB Output is correct

Subtask #3
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2392 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2392 KB Output is correct
16 Correct 1 ms 2392 KB Output is correct
17 Correct 1 ms 2392 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Correct 0 ms 2396 KB Output is correct
21 Correct 1 ms 2396 KB Output is correct
22 Correct 1 ms 2396 KB Output is correct
23 Correct 1 ms 2396 KB Output is correct
24 Correct 1 ms 2392 KB Output is correct
25 Correct 1 ms 2396 KB Output is correct
26 Correct 1 ms 2396 KB Output is correct
27 Correct 1 ms 2396 KB Output is correct
28 Correct 1 ms 2440 KB Output is correct
29 Correct 1 ms 2396 KB Output is correct
30 Correct 1 ms 2396 KB Output is correct
31 Correct 1 ms 2396 KB Output is correct
32 Correct 1 ms 2396 KB Output is correct
33 Correct 1 ms 2396 KB Output is correct
34 Correct 1 ms 2396 KB Output is correct
35 Correct 1 ms 2396 KB Output is correct
36 Correct 1 ms 2396 KB Output is correct
37 Correct 1 ms 2392 KB Output is correct
38 Correct 1 ms 2396 KB Output is correct
39 Correct 1 ms 2396 KB Output is correct
40 Correct 1 ms 2396 KB Output is correct
41 Correct 1 ms 2396 KB Output is correct
42 Correct 1 ms 2396 KB Output is correct
43 Correct 1 ms 2396 KB Output is correct
44 Correct 1 ms 2396 KB Output is correct
45 Correct 1 ms 2596 KB Output is correct

Subtask #4
36.0 / 36.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2392 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2392 KB Output is correct
16 Correct 1 ms 2392 KB Output is correct
17 Correct 1 ms 2392 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Correct 0 ms 2396 KB Output is correct
21 Correct 1 ms 2396 KB Output is correct
22 Correct 1 ms 2396 KB Output is correct
23 Correct 1 ms 2396 KB Output is correct
24 Correct 1 ms 2392 KB Output is correct
25 Correct 1 ms 2396 KB Output is correct
26 Correct 1 ms 2396 KB Output is correct
27 Correct 1 ms 2396 KB Output is correct
28 Correct 1 ms 2440 KB Output is correct
29 Correct 1 ms 2396 KB Output is correct
30 Correct 1 ms 2396 KB Output is correct
31 Correct 1 ms 2396 KB Output is correct
32 Correct 1 ms 2396 KB Output is correct
33 Correct 1 ms 2396 KB Output is correct
34 Correct 1 ms 2396 KB Output is correct
35 Correct 1 ms 2396 KB Output is correct
36 Correct 1 ms 2396 KB Output is correct
37 Correct 1 ms 2392 KB Output is correct
38 Correct 1 ms 2396 KB Output is correct
39 Correct 1 ms 2396 KB Output is correct
40 Correct 1 ms 2396 KB Output is correct
41 Correct 1 ms 2396 KB Output is correct
42 Correct 1 ms 2396 KB Output is correct
43 Correct 1 ms 2396 KB Output is correct
44 Correct 1 ms 2396 KB Output is correct
45 Correct 1 ms 2596 KB Output is correct
46 Correct 9 ms 9952 KB Output is correct
47 Correct 12 ms 10464 KB Output is correct
48 Correct 11 ms 10276 KB Output is correct
49 Correct 12 ms 10668 KB Output is correct
50 Correct 12 ms 10976 KB Output is correct
51 Correct 14 ms 10976 KB Output is correct
52 Correct 7 ms 5980 KB Output is correct
53 Correct 4 ms 5468 KB Output is correct
54 Correct 10 ms 10208 KB Output is correct
55 Correct 12 ms 10848 KB Output is correct
56 Correct 9 ms 10464 KB Output is correct
57 Correct 13 ms 10464 KB Output is correct
58 Correct 10 ms 10464 KB Output is correct
59 Correct 11 ms 10464 KB Output is correct
60 Correct 10 ms 10464 KB Output is correct

Subtask #5
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2392 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2392 KB Output is correct
16 Correct 1 ms 2392 KB Output is correct
17 Correct 1 ms 2392 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Correct 0 ms 2396 KB Output is correct
21 Correct 1 ms 2396 KB Output is correct
22 Correct 1 ms 2396 KB Output is correct
23 Correct 1 ms 2396 KB Output is correct
24 Correct 1 ms 2392 KB Output is correct
25 Correct 1 ms 2396 KB Output is correct
26 Correct 1 ms 2396 KB Output is correct
27 Correct 1 ms 2396 KB Output is correct
28 Correct 1 ms 2440 KB Output is correct
29 Correct 1 ms 2396 KB Output is correct
30 Correct 1 ms 2396 KB Output is correct
31 Correct 1 ms 2396 KB Output is correct
32 Correct 1 ms 2396 KB Output is correct
33 Correct 1 ms 2396 KB Output is correct
34 Correct 1 ms 2396 KB Output is correct
35 Correct 1 ms 2396 KB Output is correct
36 Correct 1 ms 2396 KB Output is correct
37 Correct 1 ms 2392 KB Output is correct
38 Correct 1 ms 2396 KB Output is correct
39 Correct 1 ms 2396 KB Output is correct
40 Correct 1 ms 2396 KB Output is correct
41 Correct 1 ms 2396 KB Output is correct
42 Correct 1 ms 2396 KB Output is correct
43 Correct 1 ms 2396 KB Output is correct
44 Correct 1 ms 2396 KB Output is correct
45 Correct 1 ms 2596 KB Output is correct
46 Correct 9 ms 9952 KB Output is correct
47 Correct 12 ms 10464 KB Output is correct
48 Correct 11 ms 10276 KB Output is correct
49 Correct 12 ms 10668 KB Output is correct
50 Correct 12 ms 10976 KB Output is correct
51 Correct 14 ms 10976 KB Output is correct
52 Correct 7 ms 5980 KB Output is correct
53 Correct 4 ms 5468 KB Output is correct
54 Correct 10 ms 10208 KB Output is correct
55 Correct 12 ms 10848 KB Output is correct
56 Correct 9 ms 10464 KB Output is correct
57 Correct 13 ms 10464 KB Output is correct
58 Correct 10 ms 10464 KB Output is correct
59 Correct 11 ms 10464 KB Output is correct
60 Correct 10 ms 10464 KB Output is correct
61 Correct 45 ms 20080 KB Output is correct
62 Correct 49 ms 20168 KB Output is correct
63 Correct 51 ms 19916 KB Output is correct
64 Correct 53 ms 20976 KB Output is correct
65 Correct 56 ms 22984 KB Output is correct
66 Correct 69 ms 22476 KB Output is correct
67 Correct 48 ms 19660 KB Output is correct
68 Correct 25 ms 14544 KB Output is correct
69 Correct 43 ms 18636 KB Output is correct
70 Correct 57 ms 22952 KB Output is correct
71 Correct 49 ms 19948 KB Output is correct
72 Correct 49 ms 19912 KB Output is correct
73 Correct 48 ms 20732 KB Output is correct
74 Correct 48 ms 21424 KB Output is correct
75 Correct 47 ms 21452 KB Output is correct