UVA 531 Compromise

来源：互联网发布：手机淘宝账户管理在哪编辑：程序博客网时间：2024/06/16 02:54

大意：最长公共子串+路径输出。

思路：一开始我想用map爆过去，后来发现有重复的不好处理，只好老老实实地用LCS+路径输出来做咯，路径输出在王晓东那本算法书上有明确的讲解。

#include <iostream>#include <cstdlib>#include <cstdio>#include <cstring>#include <string>#include <algorithm>#include <cmath>#include <map>using namespace std;char x[110][36], y[110][36];int d[110][110];int path[110][110];int first;int n, m;int tot;void init(){n = 1;m = 0;first = 1;memset(d, 0, sizeof(d));}void LCS(int n, int m){int i, j;for(i = 1; i <= n; i++){for(j = 1; j <= m; j++){if(strcmp(x[i-1], y[j-1]) == 0){d[i][j] = d[i-1][j-1]+1;path[i-1][j-1] = 1;}else if(d[i-1][j] >= d[i][j-1]){d[i][j] = d[i-1][j];path[i-1][j-1] = 2;}else{d[i][j] = d[i][j-1];path[i-1][j-1] = 3;}}}}void print_ans(int i, int j){if(i < 0 || j < 0) return ;if(path[i][j] == 1){print_ans(i-1, j-1);if(first) {printf("%s", x[i]); first = 0;}else printf(" %s", x[i]);}else if(path[i][j] == 2) print_ans(i-1, j);else print_ans(i, j-1);}void read_case(){while(scanf("%s", x[n]) && strcmp(x[n], "#")) n++;while(scanf("%s", y[m]) && strcmp(y[m], "#")) m++;}void solve(){init();read_case();LCS(n, m);print_ans(n-1, m-1);printf("\n");}int main(){while(~scanf("%s", x[0])){solve();}return 0;}