codeforces 387C George and Number
直接从后面往前面扫,如果前面大,就把后面丢掉
再把前面剩下的进行类似的处理就行;
#include<cstdio> #include<iostream> #include<cstring> #define maxn 100005 using namespace std; char s[maxn]; int main() { cin>>s; int l=strlen(s); int head=l-1,tail=l-1; int cnt=1; while(1) { while(s[head]=='0')head--; if(head>(tail-head+1)) { cnt++; head--; tail=head; } else if(head==(tail-head+1)) { bool flag=1; for(int i=0; i<head; i++) { if(s[i]<s[head+i]) { flag=0; break; } } if(flag==1) { cnt++; head--; tail=head; } else break; } else break; if(head==0)break; } printf("%d\n",cnt); return 0; }