poj2955

//============================================================================// Name        : 2955.cpp// Author      : // Version     :// Copyright   : Your copyright notice// Description : Hello World in C++, Ansi-style//============================================================================#include <iostream>using namespace std;int ok(char a, char b) {return (a == '(' && b == ')') || (a == '[' && b == ']');}int main() {string str;while (true) {cin >> str;if (str[0] == 'e') {return 0;}int len = str.length();int **d = new int*[len + 1];for (int i = 0; i <= len; i++) {d[i] = new int[len + 1 - i];}for (int i = 0; i <= len; i++) {d[0][i] = 0;}for (int i = 0; i < len; i++) {d[1][i] = 0;}for (int i = 2; i <= len; i++) {for (int j = 0; j <= len - i; j++) {int max = -1000000000;if (ok(str[j], str[j + i - 1])) {int ns = d[i - 2][j + 1] + 2;if (max < ns) {max = ns;}}for (int k = 1; k < i; k++) {int ns = d[k][j]+ d[i - k][j + k];if (max < ns) {max = ns;}}d[i][j] = max;}}cout<<d[len][0]<<endl;}return 0;}