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- #include <iostream>
- #include <vector>
- #include <set>
- #include <cstring>
- #include <deque>
- using namespace std;
- int mat[205][205];
- int main()
- {
- ios_base::sync_with_stdio(false);
- int n, k;
- cin >> n >> k;
- vector<int> T(n), S(n);
- for(int i = 0; i < n; i++) {
- cin >> T[i];
- }
- for(int i = 0; i < n; i++) {
- cin >> S[i];
- }
- memset(mat, 0, sizeof mat);
- for(int i = 0; i < n; i++) {
- for(int j = S[i] - 1; j < T[i] - 1; j++) {
- mat[j][i] = 1;
- }
- }
- vector<int> sums;
- for(int i = 0; i < 200; i++) {
- int sum = 0;
- for(int j = 0; j < n; j++) {
- sum += mat[i][j];
- }
- sums.push_back(sum);
- }
- int i = 0, j = 0;
- int sum = 0;
- int s = sums.size();
- while(j < s) {
- if(sum == k) {
- cout << "DA" << endl;
- return 0;
- }
- if(sum < k) {
- sum += sums[j];
- j++;
- }
- else {
- sum -= sums[i];
- i++;
- }
- }
- cout << "NE" << endl;
- return 0;
- }
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