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Submission #200542

# Submission time Handle Problem Language Result Execution time Memory
200542 2020-02-07T06:36:23 Z a1_N Bigger segments (IZhO19_segments) C++17
37 / 100
 1500 ms 148932 KB 
#include <bits/stdc++.h>

#define F first
#define S second

using namespace std;

const int N = 5e5 + 5;
const long long M = (long long)1e15;

int n,a[N];

long long pref[N];

pair<int,long long> dp[N];

unordered_map< long long,pair<int,long long> > t;

void upd(long long pos,pair<long long,long long> val,long long v = 1,long long tl = 1,long long tr = M){
	if(tl == tr){
		t[v] = val;
		return;
	}	
	long long tm = (tl + tr) >> 1;
	if(pos <= tm) upd(pos,val,v << 1,tl,tm);
	else upd(pos,val,v << 1 | 1,tm + 1,tr);
	t[v] = max(t[v << 1],t[v << 1 | 1]);
}

pair<int,long long> get(long long l,long long r,long long v = 1,long long tl = 1,long long tr = M){
	if(l <= tl && tr <= r) return t[v];
	if(tl > r || tr < l) return make_pair(0,0);
	long long tm = (tl + tr) >> 1;
	return max(get(l,r,v << 1,tl,tm),get(l,r,v << 1 | 1,tm + 1,tr));
} 

int main(){
	//ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0);
	scanf("%d",&n);
	for(int i = 1; i <= n; i++){
		scanf("%d",&a[i]);
		pref[i] = pref[i - 1] + a[i];
	}
	dp[1] = make_pair(1,a[1]);
	upd(pref[1] + dp[1].S,make_pair(dp[1].F,1));
	for(int i = 2; i <= n; i++){
		dp[i] = make_pair(dp[i - 1].F,dp[i - 1].S + a[i]);
		pair<int,long long> cur = get(1,pref[i]);
		if(cur.F > 0) dp[i] = make_pair(cur.F + 1,pref[i] - pref[cur.S]);
		upd(pref[i] + dp[i].S,make_pair(dp[i].F,i));	
	}
	printf("%d",dp[n].F);
	return 0;
}

Compilation message

segments.cpp: In function 'int main()':
segments.cpp:39:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
  ~~~~~^~~~~~~~~
segments.cpp:41:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&a[i]);
   ~~~~~^~~~~~~~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 5 ms 376 KB Output is correct
3 Correct 5 ms 376 KB Output is correct
4 Correct 5 ms 376 KB Output is correct
5 Correct 7 ms 376 KB Output is correct
6 Correct 5 ms 376 KB Output is correct
7 Correct 5 ms 376 KB Output is correct
8 Correct 5 ms 376 KB Output is correct
9 Correct 5 ms 376 KB Output is correct
10 Correct 5 ms 376 KB Output is correct
11 Correct 5 ms 376 KB Output is correct
12 Correct 5 ms 376 KB Output is correct
13 Correct 5 ms 376 KB Output is correct
14 Correct 5 ms 376 KB Output is correct
15 Correct 5 ms 376 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 5 ms 376 KB Output is correct
3 Correct 5 ms 376 KB Output is correct
4 Correct 5 ms 376 KB Output is correct
5 Correct 7 ms 376 KB Output is correct
6 Correct 5 ms 376 KB Output is correct
7 Correct 5 ms 376 KB Output is correct
8 Correct 5 ms 376 KB Output is correct
9 Correct 5 ms 376 KB Output is correct
10 Correct 5 ms 376 KB Output is correct
11 Correct 5 ms 376 KB Output is correct
12 Correct 5 ms 376 KB Output is correct
13 Correct 5 ms 376 KB Output is correct
14 Correct 5 ms 376 KB Output is correct
15 Correct 5 ms 376 KB Output is correct
16 Correct 9 ms 1400 KB Output is correct
17 Correct 11 ms 2296 KB Output is correct
18 Correct 11 ms 2344 KB Output is correct
19 Correct 11 ms 2168 KB Output is correct
20 Correct 11 ms 2168 KB Output is correct
21 Correct 11 ms 2468 KB Output is correct
22 Correct 10 ms 2172 KB Output is correct
23 Correct 9 ms 1524 KB Output is correct
24 Correct 7 ms 504 KB Output is correct
25 Correct 12 ms 2216 KB Output is correct
26 Correct 6 ms 504 KB Output is correct
27 Correct 7 ms 504 KB Output is correct
28 Correct 7 ms 632 KB Output is correct
29 Correct 9 ms 1016 KB Output is correct
30 Correct 9 ms 888 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 5 ms 376 KB Output is correct
3 Correct 5 ms 376 KB Output is correct
4 Correct 5 ms 376 KB Output is correct
5 Correct 7 ms 376 KB Output is correct
6 Correct 5 ms 376 KB Output is correct
7 Correct 5 ms 376 KB Output is correct
8 Correct 5 ms 376 KB Output is correct
9 Correct 5 ms 376 KB Output is correct
10 Correct 5 ms 376 KB Output is correct
11 Correct 5 ms 376 KB Output is correct
12 Correct 5 ms 376 KB Output is correct
13 Correct 5 ms 376 KB Output is correct
14 Correct 5 ms 376 KB Output is correct
15 Correct 5 ms 376 KB Output is correct
16 Correct 9 ms 1400 KB Output is correct
17 Correct 11 ms 2296 KB Output is correct
18 Correct 11 ms 2344 KB Output is correct
19 Correct 11 ms 2168 KB Output is correct
20 Correct 11 ms 2168 KB Output is correct
21 Correct 11 ms 2468 KB Output is correct
22 Correct 10 ms 2172 KB Output is correct
23 Correct 9 ms 1524 KB Output is correct
24 Correct 7 ms 504 KB Output is correct
25 Correct 12 ms 2216 KB Output is correct
26 Correct 6 ms 504 KB Output is correct
27 Correct 7 ms 504 KB Output is correct
28 Correct 7 ms 632 KB Output is correct
29 Correct 9 ms 1016 KB Output is correct
30 Correct 9 ms 888 KB Output is correct
31 Correct 41 ms 8068 KB Output is correct
32 Correct 52 ms 9020 KB Output is correct
33 Correct 56 ms 10424 KB Output is correct
34 Correct 50 ms 9272 KB Output is correct
35 Correct 57 ms 10424 KB Output is correct
36 Correct 70 ms 12348 KB Output is correct
37 Correct 55 ms 10680 KB Output is correct
38 Correct 46 ms 8888 KB Output is correct
39 Correct 18 ms 1528 KB Output is correct
40 Correct 60 ms 11064 KB Output is correct
41 Correct 17 ms 1400 KB Output is correct
42 Correct 21 ms 2984 KB Output is correct
43 Correct 18 ms 1400 KB Output is correct
44 Correct 25 ms 4488 KB Output is correct
45 Correct 27 ms 4484 KB Output is correct

Subtask #4
0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 5 ms 376 KB Output is correct
3 Correct 5 ms 376 KB Output is correct
4 Correct 5 ms 376 KB Output is correct
5 Correct 7 ms 376 KB Output is correct
6 Correct 5 ms 376 KB Output is correct
7 Correct 5 ms 376 KB Output is correct
8 Correct 5 ms 376 KB Output is correct
9 Correct 5 ms 376 KB Output is correct
10 Correct 5 ms 376 KB Output is correct
11 Correct 5 ms 376 KB Output is correct
12 Correct 5 ms 376 KB Output is correct
13 Correct 5 ms 376 KB Output is correct
14 Correct 5 ms 376 KB Output is correct
15 Correct 5 ms 376 KB Output is correct
16 Correct 9 ms 1400 KB Output is correct
17 Correct 11 ms 2296 KB Output is correct
18 Correct 11 ms 2344 KB Output is correct
19 Correct 11 ms 2168 KB Output is correct
20 Correct 11 ms 2168 KB Output is correct
21 Correct 11 ms 2468 KB Output is correct
22 Correct 10 ms 2172 KB Output is correct
23 Correct 9 ms 1524 KB Output is correct
24 Correct 7 ms 504 KB Output is correct
25 Correct 12 ms 2216 KB Output is correct
26 Correct 6 ms 504 KB Output is correct
27 Correct 7 ms 504 KB Output is correct
28 Correct 7 ms 632 KB Output is correct
29 Correct 9 ms 1016 KB Output is correct
30 Correct 9 ms 888 KB Output is correct
31 Correct 41 ms 8068 KB Output is correct
32 Correct 52 ms 9020 KB Output is correct
33 Correct 56 ms 10424 KB Output is correct
34 Correct 50 ms 9272 KB Output is correct
35 Correct 57 ms 10424 KB Output is correct
36 Correct 70 ms 12348 KB Output is correct
37 Correct 55 ms 10680 KB Output is correct
38 Correct 46 ms 8888 KB Output is correct
39 Correct 18 ms 1528 KB Output is correct
40 Correct 60 ms 11064 KB Output is correct
41 Correct 17 ms 1400 KB Output is correct
42 Correct 21 ms 2984 KB Output is correct
43 Correct 18 ms 1400 KB Output is correct
44 Correct 25 ms 4488 KB Output is correct
45 Correct 27 ms 4484 KB Output is correct
46 Execution timed out 1593 ms 148932 KB Time limit exceeded
47 Halted 0 ms 0 KB -

Subtask #5
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 5 ms 376 KB Output is correct
3 Correct 5 ms 376 KB Output is correct
4 Correct 5 ms 376 KB Output is correct
5 Correct 7 ms 376 KB Output is correct
6 Correct 5 ms 376 KB Output is correct
7 Correct 5 ms 376 KB Output is correct
8 Correct 5 ms 376 KB Output is correct
9 Correct 5 ms 376 KB Output is correct
10 Correct 5 ms 376 KB Output is correct
11 Correct 5 ms 376 KB Output is correct
12 Correct 5 ms 376 KB Output is correct
13 Correct 5 ms 376 KB Output is correct
14 Correct 5 ms 376 KB Output is correct
15 Correct 5 ms 376 KB Output is correct
16 Correct 9 ms 1400 KB Output is correct
17 Correct 11 ms 2296 KB Output is correct
18 Correct 11 ms 2344 KB Output is correct
19 Correct 11 ms 2168 KB Output is correct
20 Correct 11 ms 2168 KB Output is correct
21 Correct 11 ms 2468 KB Output is correct
22 Correct 10 ms 2172 KB Output is correct
23 Correct 9 ms 1524 KB Output is correct
24 Correct 7 ms 504 KB Output is correct
25 Correct 12 ms 2216 KB Output is correct
26 Correct 6 ms 504 KB Output is correct
27 Correct 7 ms 504 KB Output is correct
28 Correct 7 ms 632 KB Output is correct
29 Correct 9 ms 1016 KB Output is correct
30 Correct 9 ms 888 KB Output is correct
31 Correct 41 ms 8068 KB Output is correct
32 Correct 52 ms 9020 KB Output is correct
33 Correct 56 ms 10424 KB Output is correct
34 Correct 50 ms 9272 KB Output is correct
35 Correct 57 ms 10424 KB Output is correct
36 Correct 70 ms 12348 KB Output is correct
37 Correct 55 ms 10680 KB Output is correct
38 Correct 46 ms 8888 KB Output is correct
39 Correct 18 ms 1528 KB Output is correct
40 Correct 60 ms 11064 KB Output is correct
41 Correct 17 ms 1400 KB Output is correct
42 Correct 21 ms 2984 KB Output is correct
43 Correct 18 ms 1400 KB Output is correct
44 Correct 25 ms 4488 KB Output is correct
45 Correct 27 ms 4484 KB Output is correct
46 Execution timed out 1593 ms 148932 KB Time limit exceeded
47 Halted 0 ms 0 KB -