oj.uz

Submission #957145

# Submission time Handle Problem Language Result Execution time Memory
957145 2024-04-03T05:12:36 Z Requiem Bigger segments (IZhO19_segments) C++17
100 / 100
 63 ms 20852 KB 
#include<bits/stdc++.h>
#define int long long
#define pb push_back
#define fast ios_base::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr);
#define MOD 1000000007
#define INF 1e18
#define fi first
#define se second
#define FOR(i,a,b) for(int i=a;i<=b;i++)
#define FORD(i,a,b) for(int i=a;i>=b;i--)
#define sz(a) ((int)(a).size())
#define endl '\n'
#define pi 3.14159265359
#define TASKNAME "segments"
template<typename T> bool maximize(T &res, const T &val) { if (res < val){ res = val; return true; }; return false; }
template<typename T> bool minimize(T &res, const T &val) { if (res > val){ res = val; return true; }; return false; }
using namespace std;
typedef pair<int,int> ii;
typedef pair<int,ii> iii;
typedef vector<int> vi;
const int MAXN = 5e5 + 9;
int n, a[MAXN], pre[MAXN];

ii dp[MAXN];

void upd(ii &a, ii b){
    if (a.fi < b.fi) a = b;
    else if (a.fi == b.fi and a.se > b.se) a = b;
}
main()
{
    fast;
    if (fopen(TASKNAME".inp","r")){
        freopen(TASKNAME".inp","r",stdin);
        freopen(TASKNAME".out","w",stdout);
    }
    cin >> n;
    for(int i = 1; i <= n; i++){
        cin >> a[i];
        pre[i] = pre[i - 1] + a[i];
    }
    dp[0] = {0, 0};
    int mx = 0;
    for(int i = 0; i <= n; i++){
        int lo = i + 1;
        int hi = n;
        int res = 0;
        if (i > 0) upd(dp[i], ii(dp[i - 1].fi, dp[i - 1].se + a[i]));

        while(lo <= hi){
            int mid = (lo + hi) >> 1;
            if (pre[mid] - pre[i] >= dp[i].se){
                res = mid;
                hi = mid - 1;
            }
            else lo = mid + 1;
        }
        upd(dp[res], ii(dp[i].fi + 1, pre[res] - pre[i]));
        maximize(mx, dp[i].fi);
//        cout << res << ' ' << dp[i].fi << ' ' << dp[i].se << endl;
    }
    cout << mx << endl;
}

Compilation message

segments.cpp:30:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   30 | main()
      | ^~~~
segments.cpp: In function 'int main()':
segments.cpp:34:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   34 |         freopen(TASKNAME".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
segments.cpp:35:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 |         freopen(TASKNAME".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2392 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 1 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 2396 KB Output is correct
14 Correct 1 ms 2512 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2392 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 1 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 2396 KB Output is correct
14 Correct 1 ms 2512 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Correct 1 ms 2528 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 2392 KB Output is correct
24 Correct 1 ms 2396 KB Output is correct
25 Correct 1 ms 2404 KB Output is correct
26 Correct 1 ms 2404 KB Output is correct
27 Correct 1 ms 2396 KB Output is correct
28 Correct 1 ms 2396 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

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2392 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 1 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 2396 KB Output is correct
14 Correct 1 ms 2512 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Correct 1 ms 2528 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 2392 KB Output is correct
24 Correct 1 ms 2396 KB Output is correct
25 Correct 1 ms 2404 KB Output is correct
26 Correct 1 ms 2404 KB Output is correct
27 Correct 1 ms 2396 KB Output is correct
28 Correct 1 ms 2396 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 2464 KB Output is correct
34 Correct 1 ms 2396 KB Output is correct
35 Correct 1 ms 2572 KB Output is correct
36 Correct 1 ms 2528 KB Output is correct
37 Correct 1 ms 2396 KB Output is correct
38 Correct 1 ms 2396 KB Output is correct
39 Correct 1 ms 2512 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 2404 KB Output is correct
45 Correct 1 ms 2396 KB Output is correct

Subtask #4
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2392 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 1 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 2396 KB Output is correct
14 Correct 1 ms 2512 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Correct 1 ms 2528 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 2392 KB Output is correct
24 Correct 1 ms 2396 KB Output is correct
25 Correct 1 ms 2404 KB Output is correct
26 Correct 1 ms 2404 KB Output is correct
27 Correct 1 ms 2396 KB Output is correct
28 Correct 1 ms 2396 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 2464 KB Output is correct
34 Correct 1 ms 2396 KB Output is correct
35 Correct 1 ms 2572 KB Output is correct
36 Correct 1 ms 2528 KB Output is correct
37 Correct 1 ms 2396 KB Output is correct
38 Correct 1 ms 2396 KB Output is correct
39 Correct 1 ms 2512 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 2404 KB Output is correct
45 Correct 1 ms 2396 KB Output is correct
46 Correct 10 ms 9124 KB Output is correct
47 Correct 11 ms 9188 KB Output is correct
48 Correct 13 ms 9296 KB Output is correct
49 Correct 10 ms 9564 KB Output is correct
50 Correct 13 ms 9564 KB Output is correct
51 Correct 15 ms 9564 KB Output is correct
52 Correct 6 ms 4188 KB Output is correct
53 Correct 6 ms 3420 KB Output is correct
54 Correct 10 ms 8796 KB Output is correct
55 Correct 12 ms 9564 KB Output is correct
56 Correct 9 ms 9052 KB Output is correct
57 Correct 9 ms 9068 KB Output is correct
58 Correct 9 ms 9052 KB Output is correct
59 Correct 9 ms 9308 KB Output is correct
60 Correct 9 ms 9168 KB Output is correct

Subtask #5
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2392 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 1 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 2396 KB Output is correct
14 Correct 1 ms 2512 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Correct 1 ms 2528 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 2392 KB Output is correct
24 Correct 1 ms 2396 KB Output is correct
25 Correct 1 ms 2404 KB Output is correct
26 Correct 1 ms 2404 KB Output is correct
27 Correct 1 ms 2396 KB Output is correct
28 Correct 1 ms 2396 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 2464 KB Output is correct
34 Correct 1 ms 2396 KB Output is correct
35 Correct 1 ms 2572 KB Output is correct
36 Correct 1 ms 2528 KB Output is correct
37 Correct 1 ms 2396 KB Output is correct
38 Correct 1 ms 2396 KB Output is correct
39 Correct 1 ms 2512 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 2404 KB Output is correct
45 Correct 1 ms 2396 KB Output is correct
46 Correct 10 ms 9124 KB Output is correct
47 Correct 11 ms 9188 KB Output is correct
48 Correct 13 ms 9296 KB Output is correct
49 Correct 10 ms 9564 KB Output is correct
50 Correct 13 ms 9564 KB Output is correct
51 Correct 15 ms 9564 KB Output is correct
52 Correct 6 ms 4188 KB Output is correct
53 Correct 6 ms 3420 KB Output is correct
54 Correct 10 ms 8796 KB Output is correct
55 Correct 12 ms 9564 KB Output is correct
56 Correct 9 ms 9052 KB Output is correct
57 Correct 9 ms 9068 KB Output is correct
58 Correct 9 ms 9052 KB Output is correct
59 Correct 9 ms 9308 KB Output is correct
60 Correct 9 ms 9168 KB Output is correct
61 Correct 41 ms 18004 KB Output is correct
62 Correct 46 ms 18076 KB Output is correct
63 Correct 52 ms 18256 KB Output is correct
64 Correct 53 ms 20400 KB Output is correct
65 Correct 50 ms 20816 KB Output is correct
66 Correct 63 ms 20820 KB Output is correct
67 Correct 53 ms 17528 KB Output is correct
68 Correct 24 ms 12164 KB Output is correct
69 Correct 45 ms 16980 KB Output is correct
70 Correct 61 ms 20852 KB Output is correct
71 Correct 36 ms 17812 KB Output is correct
72 Correct 43 ms 18244 KB Output is correct
73 Correct 47 ms 19032 KB Output is correct
74 Correct 42 ms 19168 KB Output is correct
75 Correct 43 ms 19288 KB Output is correct