58 lines
1.4 KiB
Text
58 lines
1.4 KiB
Text
void bubble_sort(int[][] arr, int n) {
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for (var i = 0; i < n-1; i = i+1;) {
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for (var j = 0; j < n-i-1; j = j+1;) {
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if ((arr[j][0] > arr[j+1][0]) |
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((arr[j][0] == arr[j+1][0]) & (arr[j][1] < arr[j+1][1])) ) {
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var temp = arr[j+1];
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arr[j+1] = arr[j];
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arr[j] = temp;
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}
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}
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}
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return;
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}
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int longest_increasing_subsequence(int[] arr, int n) {
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var dp = new int[n];
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var max_subsequence = 0;
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for (var i = 0; i < n; i = i+1;) {
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dp[i] = 1;
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var max_seq = 0;
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for (var j = 0; j < i; j = j+1;) {
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if (arr[i] > arr[j] & dp[j] > max_seq) {
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max_seq = dp[j];
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}
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}
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dp[i] = max_seq + 1;
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if (dp[i] > max_subsequence) {
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max_subsequence = dp[i];
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}
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}
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return max_subsequence;
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}
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int max_envelopes(int[][] envelopes, int n) {
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bubble_sort(envelopes, n);
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var heights = new int[n];
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for (var i = 0; i < n; i = i+1;) {
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heights[i] = envelopes[i][1];
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}
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return longest_increasing_subsequence(heights, n);
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}
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int program(int argc, string[] argv) {
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var envelopes = new int[][] {
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new int[] {5, 4},
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new int[] {6, 4},
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new int[] {6, 7},
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new int[] {2, 3}
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};
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var n = 4;
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var res = max_envelopes(envelopes, n);
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return res;
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}
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