标签:http io for ar cti 代码 amp on ef
题目大意:给出两段话,找出里面最长的公共单词的子序列。并且输出任意一个子序列。
解题思路:LIS。
代码:
#include <cstdio> #include <cstring> const int N = 105; const int M = 35; char w1[N][M]; char w2[N][M]; int f[N][N]; int p[N][N][2]; int ans[N]; int n1, n2; void printf_ans (int x, int y) { if (x == 0 || y == 0) return; printf_ans (p[x][y][0], p[x][y][1]); if (strcmp (w1[x - 1], w2[y - 1]) == 0) ans[f[x][y]] = x - 1; } int main () { n1 = n2 = 0; while (scanf ("%s", w1[n1++]) != EOF) { while (scanf ("%s", w1[n1]) && w1[n1][0] != '#') { n1++; } while (scanf ("%s", w2[n2]) && w2[n2][0] != '#') { n2++; } for (int i = 0; i <= n1; i++) f[i][0] = 0; for (int i = 0; i <= n2; i++) f[0][i] = 0; for (int i = 1; i <= n1; i++) for (int j = 1; j <= n2; j++) { if (strcmp(w1[i - 1], w2[j - 1]) == 0) { f[i][j] = f[i - 1][j - 1] + 1; p[i][j][0] = i - 1; p[i][j][1] = j - 1; } else { if (f[i][j - 1] > f[i - 1][j]) { f[i][j] = f[i][j -1]; p[i][j][0] = i; p[i][j][1] = j - 1; } else { f[i][j] = f[i - 1][j]; p[i][j][0] = i - 1; p[i][j][1] = j; } } } printf_ans(n1, n2); for (int i = 1; i < f[n1][n2]; i++) printf ("%s ", w1[ans[i]]); printf ("%s\n", w1[ans[f[n1][n2]]]); n1 = n2 = 0; } }
标签:http io for ar cti 代码 amp on ef
原文地址:http://blog.csdn.net/u012997373/article/details/38753131