https://codeforces.com/contest/1104/problem/B

C++版本一

題解：類似于括號匹配的思想

/* *@Author: STZG *@Language: C++ */ #include <bits/stdc++.h> #include<iostream> #include<algorithm> #include<cstdlib> #include<cstring> #include<cstdio> #include<string> #include<vector> #include<bitset> #include<queue> #include<deque> #include<stack> #include<cmath> #include<list> #include<map> #include<set> //#define DEBUG #define RI register int using namespace std; typedef long long ll; //typedef __int128 lll; const int N=100000+10; const int MOD=1e9+7; const double PI = acos(-1.0); const double EXP = 1E-8; const int INF = 0x3f3f3f3f; int t,n,m,k,q; int ans,cnt,flag,temp; int a[N]; char str[N]; int main() { #ifdef DEBUGfreopen("input.in", "r", stdin);//freopen("output.out", "w", stdout); #endifscanf("%s",str);//scanf("%d",&t);//while(t--){}stack<char>st;st.push(str[0]);int len=strlen(str);for(int i=1;i<len;i++){if(st.size()!=0&&st.top()==str[i]){st.pop();ans++;}else{st.push(str[i]);}}if(ans%2){printf("Yes\n");}else{printf("No\n");}//cout << "Hello world!" << endl;return 0; }

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