Increasing Sequences POJ - 1239

版权声明： https://blog.csdn.net/weixin_40959045/article/details/88382006

1. dp1来枚举最后一位数最短长度
2. dp2来最小的第一个数

 #include<cstdio>
 #include <cstring>
 #include <algorithm>
 using namespace std;
 #define fst first
 #define sec second
 #define sci(num) scanf("%d",&num)
 #define scl(num) scanf("%lld",&num)
 #define mem(a,b) memset(a,b,sizeof a)
 #define cpy(a,b) memcopy(a,b,sizeof b)
 typedef long long LL;
 typedef pair<int,int> P;
 const int MAX_N = 110;
 const int MAX_M = 10000;
 int dp1[MAX_N],dp2[MAX_N];
 
    
    
     
     char
    
     str[MAX_N];
 
    
    
     
     char
    
     s[2][MAX_N];
 bool judge(int i,int j,int m,int n) {
     while (str[i] == '0' && i <= j) i++;
     while (str[m] == '0' && m <= n) m++;
     if (i > j) return false;
     if (m > n) return true;
     if (j - i > n - m) return true;
     else if (j - i < n - m) return false;
     for (int k = i;k <= j;k++) {
         s[0][k - i] = str[k];
     }
     s[0][j - i + 1] = '\0';
     for (int k = m;k <= n;k++) {
         s[1][k - m] = str[k];
     }
     s[1][n - m + 1] = '\0';
     if (strcmp(s[0],s[1]) > 0) {
         return true;
     } else {
         return false;
     }
 }
 int main() {
     while (~scanf("%s",str + 1)){
         int len = strlen(str + 1);
         if (len == 1 && str[1] == '0') break;
         for (int i = 1;i <= len;i++) {
             dp1[i] = i;
             for (int j = i - 1;j >= 1;j--){
                 if (judge(j+1,i,j - dp1[j] + 1,j)){
                     dp1[i] = i -j;
                     break;
                 }
             }
         }
         int t = len - dp1[len] + 1;
         dp2[t] = dp1[len];
         for (int i =t - 1;i >= 1;i--) {
             if (str[i] == '0') {
                 dp2[i] = dp2[i + 1] + 1;
                 continue;
             }
             for (int j = t;j > i;j--) {
                 if (judge(j,j+dp2[j]-1,i,j-1)) {
                     dp2[i] = j - i;
                     break;
                 }
             }
         }
         for (int i = 1;i <= dp2[1];i++)
             putchar(str[i]);
         int pp = dp2[1] + 1;
         while (pp <= len) {
             putchar(',');
             for (int i = pp;i < pp + dp2[pp];i++) {
                 putchar(str[i]);
             }
             pp = pp + dp2[pp];
         }
         putchar('\n');
     }
     return 0;
 }