oj.uz

Submission #849960

# Submission time Handle Problem Language Result Execution time Memory
849960 2023-09-15T15:06:02 Z gun_gan Sjeckanje (COCI21_sjeckanje) C++17
55 / 110
 2000 ms 10240 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

const int MX = 2e5 + 5;

int N, Q;
ll A[MX], dp[MX][2];

ll calc() {
      for(int i = 0; i <= N; i++) dp[i][0] = dp[i][1] = 0;

      vector<array<ll,3>> v;

      for(int i = 1; i + 1 <= N; i++) {
            if(A[i + 1] >= A[i]) {
                  int j = i;
                  ll sum = 0;
                  while(j + 1 <= N && A[j + 1] >= A[j]) {
                        sum += A[j + 1] - A[j];
                        j++;
                  }
                  v.push_back({A[i + 1] - A[i], A[j] - A[j - 1], sum});
                  i = j - 1;
            } else {
                  int j = i;
                  ll sum = 0;
                  while(j + 1 <= N && A[j + 1] < A[j]) {
                        sum += A[j] - A[j + 1];
                        j++;
                  }
                  v.push_back({A[i] - A[i + 1], A[j - 1] - A[j], sum});
                  i = j - 1;
            }
      }

      dp[0][0] = v[0][2];
      dp[0][1] = v[0][2] - v[0][1];
      for(int i = 1; i < v.size(); i++) {
            dp[i][0] = max(dp[i - 1][0] + v[i][2] - v[i][0], dp[i - 1][1] + v[i][2]);
            dp[i][1] = max(dp[i - 1][0] + max(0LL, v[i][2] - v[i][0] - v[i][1]), dp[i - 1][1] + v[i][2] - v[i][1]);
      }

      return dp[v.size() - 1][0];
}

int main() {
      cin.tie(0); ios_base::sync_with_stdio(0);

      cin >> N >> Q;

      for(int i = 1; i <= N; i++) cin >> A[i];

      for(int i = 1; i <= Q; i++) {
            ll l, r, x;
            cin >> l >> r >> x;

            for(int j = l; j <= r; j++) A[j] += x;

            cout << calc() << '\n';
      }
}

Compilation message

Main.cpp: In function 'll calc()':
Main.cpp:39:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::array<long long int, 3> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |       for(int i = 1; i < v.size(); i++) {
      |                      ~~^~~~~~~~~~

Subtask #1
15.0 / 15.0

# 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 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct

Subtask #2
40.0 / 40.0

# 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 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 62 ms 2756 KB Output is correct
8 Correct 70 ms 2740 KB Output is correct
9 Correct 72 ms 2908 KB Output is correct
10 Correct 72 ms 2760 KB Output is correct
11 Correct 62 ms 2740 KB Output is correct
12 Correct 173 ms 2844 KB Output is correct

Subtask #3
0 / 55.0

# 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 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 62 ms 2756 KB Output is correct
8 Correct 70 ms 2740 KB Output is correct
9 Correct 72 ms 2908 KB Output is correct
10 Correct 72 ms 2760 KB Output is correct
11 Correct 62 ms 2740 KB Output is correct
12 Correct 173 ms 2844 KB Output is correct
13 Execution timed out 2089 ms 10240 KB Time limit exceeded
14 Halted 0 ms 0 KB -