Codeforces Round #664
Codeforces Round #664 https://codeforces.com/contest/1395 A 题意 给四种颜色的球,可以把一个红色一个蓝色一个绿色染成白色,问能不能变成回文串 #include <cstdio> #include <stack> #include <set> #include <cmath> #include <map> #include <time.h> #include <vector> #include <iostream> #include <string> #include <cstring> #include <algorithm> //#include <memory.h> #include <cstdlib> #include <queue> #include <iomanip> #include <cassert> #include <unordered_map> #define P pair<int, int> #define LL long long #define LD long double #define PLL pair<LL, LL> #define mset(a, b) memset(a, b, sizeof(a)) #define rep(i, a, b) for (int i = a; i < b; i++) #define PI acos(-1....