Submission #420599

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
420599	2021-06-08T12:54:15 Z	Nicholas_Patrick	Cigle (COI21_cigle)	C++17	48 / 100	1000 ms	98384 KB

cigle

#pragma GCC optimize("O3")
#include <cstdio>
#include <queue>
#include <algorithm>
using namespace std;
 
int n;
vector<vector<int>> dp;
int qry(int x, int y){
	int ret=-1000000000;
	for(int j=y; j>=0; j-=j+1&~j)
		ret=max(ret, dp[x][j]);
	return ret;
}
void upd(int x, int y, int v){
	dp[x][y]=max(dp[x][y], v);
}
int main(){
	scanf("%d", &n);
	vector<int> d(n);
	for(int& i : d)
		scanf("%d", &i);
	dp.assign(n, vector<int>(n, 0));
	/*
		dp[x][y]
		x: last brick laid
		y: earliest brick in last row
		y≤x
	*/
	for(int i=1; i<n; i++){
		vector<int> suffsum, prefsum;
		for(int j=i; j--;){
			if(suffsum.empty()){
				suffsum.push_back(d[j]);
			}else{
				suffsum.push_back(d[j]+suffsum.back());
			}
		}
		for(int j=i; j<n; j++){
			if(prefsum.empty()){
				prefsum.push_back(d[j]);
			}else{
				prefsum.push_back(d[j]+prefsum.back());
			}
		}
		for(int j=0, k=0, matches=0; j<prefsum.size(); j++){
			while(k+1<suffsum.size() and suffsum[k]<prefsum[j])
				k++;
			if(prefsum[j]==suffsum[k]){
				matches++;
				if(i+j+1<n)
					upd(i+j+1, i, qry(i-1, i-k-2)+matches);
			}
		}
		for(int j=1; j<n; j++)
			dp[j][i]=max(dp[j][i], dp[j-1][i]);
		for(int k=i; k<n; k+=k+1&~k)for(int j=0; j<n; j++)
			dp[j][k]=max(dp[j][k], dp[j][i]);
	}
	int ans=0;
	for(auto& i : dp)
		ans=max(ans, *max_element(i.begin(), i.end()));
	printf("%d\n", ans);
}

Compilation message

cigle.cpp: In function 'int qry(int, int)':
cigle.cpp:11:25: warning: suggest parentheses around '+' in operand of '&' [-Wparentheses]
   11 |  for(int j=y; j>=0; j-=j+1&~j)
      |                        ~^~
cigle.cpp: In function 'int main()':
cigle.cpp:46:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |   for(int j=0, k=0, matches=0; j<prefsum.size(); j++){
      |                                ~^~~~~~~~~~~~~~~
cigle.cpp:47:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |    while(k+1<suffsum.size() and suffsum[k]<prefsum[j])
      |          ~~~^~~~~~~~~~~~~~~
cigle.cpp:57:25: warning: suggest parentheses around '+' in operand of '&' [-Wparentheses]
   57 |   for(int k=i; k<n; k+=k+1&~k)for(int j=0; j<n; j++)
      |                        ~^~
cigle.cpp:19:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   19 |  scanf("%d", &n);
      |  ~~~~~^~~~~~~~~~
cigle.cpp:22:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |   scanf("%d", &i);
      |   ~~~~~^~~~~~~~~~

Subtask #1
9.0 / 9.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	204 KB	Output is correct
2	Correct	0 ms	204 KB	Output is correct
3	Correct	0 ms	204 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	0 ms	204 KB	Output is correct
6	Correct	0 ms	204 KB	Output is correct
7	Correct	0 ms	204 KB	Output is correct
8	Correct	0 ms	204 KB	Output is correct
9	Correct	0 ms	204 KB	Output is correct

Subtask #2
11.0 / 11.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	204 KB	Output is correct
2	Correct	0 ms	204 KB	Output is correct
3	Correct	0 ms	204 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	0 ms	204 KB	Output is correct
6	Correct	0 ms	204 KB	Output is correct
7	Correct	0 ms	204 KB	Output is correct
8	Correct	0 ms	204 KB	Output is correct
9	Correct	0 ms	204 KB	Output is correct
10	Correct	1 ms	204 KB	Output is correct
11	Correct	1 ms	204 KB	Output is correct
12	Correct	1 ms	204 KB	Output is correct
13	Correct	1 ms	204 KB	Output is correct
14	Correct	1 ms	204 KB	Output is correct
15	Correct	1 ms	204 KB	Output is correct
16	Correct	1 ms	204 KB	Output is correct
17	Correct	1 ms	204 KB	Output is correct
18	Correct	1 ms	204 KB	Output is correct
19	Correct	0 ms	204 KB	Output is correct
20	Correct	1 ms	204 KB	Output is correct

Subtask #3
13.0 / 13.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	6 ms	1228 KB	Output is correct
2	Correct	7 ms	1284 KB	Output is correct
3	Correct	6 ms	1228 KB	Output is correct
4	Correct	7 ms	1228 KB	Output is correct
5	Correct	9 ms	1228 KB	Output is correct
6	Correct	7 ms	1284 KB	Output is correct
7	Correct	7 ms	1280 KB	Output is correct
8	Correct	7 ms	1280 KB	Output is correct
9	Correct	7 ms	1280 KB	Output is correct
10	Correct	6 ms	1228 KB	Output is correct
11	Correct	8 ms	1228 KB	Output is correct
12	Correct	6 ms	1164 KB	Output is correct

Subtask #4
15.0 / 15.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	204 KB	Output is correct
2	Correct	0 ms	204 KB	Output is correct
3	Correct	0 ms	204 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	0 ms	204 KB	Output is correct
6	Correct	0 ms	204 KB	Output is correct
7	Correct	0 ms	204 KB	Output is correct
8	Correct	0 ms	204 KB	Output is correct
9	Correct	0 ms	204 KB	Output is correct
10	Correct	1 ms	204 KB	Output is correct
11	Correct	1 ms	204 KB	Output is correct
12	Correct	1 ms	204 KB	Output is correct
13	Correct	1 ms	204 KB	Output is correct
14	Correct	1 ms	204 KB	Output is correct
15	Correct	1 ms	204 KB	Output is correct
16	Correct	1 ms	204 KB	Output is correct
17	Correct	1 ms	204 KB	Output is correct
18	Correct	1 ms	204 KB	Output is correct
19	Correct	0 ms	204 KB	Output is correct
20	Correct	1 ms	204 KB	Output is correct
21	Correct	6 ms	1228 KB	Output is correct
22	Correct	7 ms	1284 KB	Output is correct
23	Correct	6 ms	1228 KB	Output is correct
24	Correct	7 ms	1228 KB	Output is correct
25	Correct	9 ms	1228 KB	Output is correct
26	Correct	7 ms	1284 KB	Output is correct
27	Correct	7 ms	1280 KB	Output is correct
28	Correct	7 ms	1280 KB	Output is correct
29	Correct	7 ms	1280 KB	Output is correct
30	Correct	6 ms	1228 KB	Output is correct
31	Correct	8 ms	1228 KB	Output is correct
32	Correct	6 ms	1164 KB	Output is correct
33	Correct	6 ms	1228 KB	Output is correct
34	Correct	6 ms	1228 KB	Output is correct
35	Correct	6 ms	1228 KB	Output is correct
36	Correct	7 ms	1228 KB	Output is correct
37	Correct	6 ms	1228 KB	Output is correct
38	Correct	6 ms	1288 KB	Output is correct
39	Correct	6 ms	1228 KB	Output is correct
40	Correct	6 ms	1228 KB	Output is correct
41	Correct	6 ms	1228 KB	Output is correct
42	Correct	5 ms	1228 KB	Output is correct
43	Correct	5 ms	1228 KB	Output is correct
44	Correct	5 ms	1228 KB	Output is correct
45	Correct	5 ms	1228 KB	Output is correct
46	Correct	11 ms	1228 KB	Output is correct
47	Correct	5 ms	1228 KB	Output is correct
48	Correct	5 ms	1284 KB	Output is correct
49	Correct	5 ms	1228 KB	Output is correct

Subtask #5
0 / 52.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	204 KB	Output is correct
2	Correct	0 ms	204 KB	Output is correct
3	Correct	0 ms	204 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	0 ms	204 KB	Output is correct
6	Correct	0 ms	204 KB	Output is correct
7	Correct	0 ms	204 KB	Output is correct
8	Correct	0 ms	204 KB	Output is correct
9	Correct	0 ms	204 KB	Output is correct
10	Correct	1 ms	204 KB	Output is correct
11	Correct	1 ms	204 KB	Output is correct
12	Correct	1 ms	204 KB	Output is correct
13	Correct	1 ms	204 KB	Output is correct
14	Correct	1 ms	204 KB	Output is correct
15	Correct	1 ms	204 KB	Output is correct
16	Correct	1 ms	204 KB	Output is correct
17	Correct	1 ms	204 KB	Output is correct
18	Correct	1 ms	204 KB	Output is correct
19	Correct	0 ms	204 KB	Output is correct
20	Correct	1 ms	204 KB	Output is correct
21	Correct	6 ms	1228 KB	Output is correct
22	Correct	7 ms	1284 KB	Output is correct
23	Correct	6 ms	1228 KB	Output is correct
24	Correct	7 ms	1228 KB	Output is correct
25	Correct	9 ms	1228 KB	Output is correct
26	Correct	7 ms	1284 KB	Output is correct
27	Correct	7 ms	1280 KB	Output is correct
28	Correct	7 ms	1280 KB	Output is correct
29	Correct	7 ms	1280 KB	Output is correct
30	Correct	6 ms	1228 KB	Output is correct
31	Correct	8 ms	1228 KB	Output is correct
32	Correct	6 ms	1164 KB	Output is correct
33	Correct	6 ms	1228 KB	Output is correct
34	Correct	6 ms	1228 KB	Output is correct
35	Correct	6 ms	1228 KB	Output is correct
36	Correct	7 ms	1228 KB	Output is correct
37	Correct	6 ms	1228 KB	Output is correct
38	Correct	6 ms	1288 KB	Output is correct
39	Correct	6 ms	1228 KB	Output is correct
40	Correct	6 ms	1228 KB	Output is correct
41	Correct	6 ms	1228 KB	Output is correct
42	Correct	5 ms	1228 KB	Output is correct
43	Correct	5 ms	1228 KB	Output is correct
44	Correct	5 ms	1228 KB	Output is correct
45	Correct	5 ms	1228 KB	Output is correct
46	Correct	11 ms	1228 KB	Output is correct
47	Correct	5 ms	1228 KB	Output is correct
48	Correct	5 ms	1284 KB	Output is correct
49	Correct	5 ms	1228 KB	Output is correct
50	Execution timed out	1086 ms	98384 KB	Time limit exceeded
51	Halted	0 ms	0 KB	-

Submission #420599

Compilation message

Subtask #1 9.0 / 9.0

Subtask #2 11.0 / 11.0

Subtask #3 13.0 / 13.0

Subtask #4 15.0 / 15.0

Subtask #5 0 / 52.0

Subtask #1
9.0 / 9.0

Subtask #2
11.0 / 11.0

Subtask #3
13.0 / 13.0

Subtask #4
15.0 / 15.0

Subtask #5
0 / 52.0