| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 237720 |
2020-06-08T12:40:22 Z |
Half |
Feast (NOI19_feast) |
C++14 |
|
1000 ms |
4848 KB |
#include <iostream>
#include <vector>
#include <set>
#include <map>
#include <algorithm>
#include <cmath>
using namespace std;
typedef vector<int> vi;
typedef pair<int,int> pi;
typedef long long ll;
#define loop(i,a,b) for (int i = a; i <= b; i++)
#define INF ((unsigned) ~0)
#define F first
#define S second
#define PB push_back
#define MP make_pair
const int MXN = 500000;
int N, K;
int a[MXN];
vi g;
vector<ll> sg;
//ll mem[4000][4000];
int dp(int l, int n){
if(l >= g.size())
return 0;
if(n <= 0)
return 0;
//if(mem[l][n] != -1)
// return mem[l][n];
ll sol = sg[l + 1] - sg[l];
for(int i = l + 1; i <= g.size(); i++)
for(int j = l; j <= i; j++)
sol = max(sol, dp(i, n - 1) + sg[i] - sg[j]);
//mem[l][n] = sol;
return sol;
}
int main(){
cin >> N >> K;
for(int i = 0; i < N; i++){
cin >> a[i];
if(g.size() == 0){
g.push_back(a[i]);
}else if((g[g.size() - 1] > 0 && a[i] > 0) || (g[g.size() - 1] < 0 && a[i] < 0)){
g[g.size() - 1] += a[i];
}else{
//cout << g[g.size() - 1] << " ";
g.push_back(a[i]);
}
}
//cout << "\n";
/*for(int i = 0; i < 4000; i++)
for(int j = 0; j < 4000; j++)
mem[i][j] = -1;*/
ll sm = 0;
sg.push_back(0);
for(int i = 0; i < g.size(); i++){
sm += g[i];
sg.push_back(sm);
}
if(g.size() == 1){
cout << g[0] << "\n";
}else if(g.size() == 2){
cout << max(g[0], g[1]) << "\n";
}else if(g.size() == 3 && g[0] > 0){
if(K == 1)
cout << max(max(g[0], g[2]), g[0] + g[1] + g[2]) << "\n";
if(K >= 2)
cout << g[0] + g[2] << "\n";
}else if(K == 1){
ll mx = 0;
for(int i = 0; i < g.size(); i++)
for(int j = i + 1; j < g.size() + 1; j++)
mx = max(mx, sg[j] - sg[i]);
cout << mx << "\n";
}else{
cout << dp(0, K) << "\n";
}
}
Compilation message
feast.cpp: In function 'int dp(int, int)':
feast.cpp:30:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
if(l >= g.size())
~~^~~~~~~~~~~
feast.cpp:37:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i = l + 1; i <= g.size(); i++)
~~^~~~~~~~~~~
feast.cpp: In function 'int main()':
feast.cpp:63:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i = 0; i < g.size(); i++){
~~^~~~~~~~~~
feast.cpp:78:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i = 0; i < g.size(); i++)
~~^~~~~~~~~~
feast.cpp:79:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int j = i + 1; j < g.size() + 1; j++)
~~^~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Execution timed out |
1094 ms |
4848 KB |
Time limit exceeded |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
94 ms |
1528 KB |
Output is correct |
| 2 |
Correct |
98 ms |
1528 KB |
Output is correct |
| 3 |
Correct |
95 ms |
1528 KB |
Output is correct |
| 4 |
Execution timed out |
1085 ms |
1528 KB |
Time limit exceeded |
| 5 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Execution timed out |
1083 ms |
4228 KB |
Time limit exceeded |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
5 ms |
256 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
5 ms |
256 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
5 ms |
256 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Execution timed out |
1094 ms |
4848 KB |
Time limit exceeded |
| 2 |
Halted |
0 ms |
0 KB |
- |
