//wtrl,everybody hangbeat me #include /*#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include*/ using namespace std; typedef long long ll; typedef pair pii; typedef vector vii; typedef vector vi; typedef vector vll; typedef vector vvi; typedef pair pll; /*=====================================================================*/ #define pb push_back #define rep(i,n) for(int i=0;i<(int)(n);i++) #define all(s) (s).begin(),(s).end() #define repd(i,n) for(int i=n-1;i>=0;i--) #define forn(i,p,n) for(int i=p;i<=n;i++) #define ford(i,p,n) for(int i=n;i>=p;i--) #define foreach(i,c) for(__typeof(c.begin())i=(c.begin());i!=(c).end();++i) #define INF 1e9 #define PI acos(-1) /*=====================================================================*/ string int_to_string(ll n) { string s=""; while(n) { ll now=n%10; s+=now+'0'; n/=10; } reverse(s.begin(),s.end()); return s; } ll string_to_int(string s) { ll n=0; rep(i,s.size()) { n*=10; n+=s[i]-'0'; } return n; } /*======================================================================*/ const int dx[]={-1,0,1,0}; const int dy[]={0,-1,0,1}; const int month[2][12]={{31,28,31,30,31,30,31,31,30,31,30,31},{31,29,31,30,31,30,31,31,30,31,30,31}}; //think twice,code once //think once,debug forever int mod=998244353; ll quickpower(ll n,ll k) { //cout<>=1; } //cout<>a>>b>>k; if(k%2==1) { //cout<>t; while(t--) { solve(); } return 0; } /* 注意数组越界,vector长度为0的时候循环会RE 注意输入顺序 注意循环时int*int爆ll 注意答案存爆ll 存答案用string过慢,最好直接输出或者用vector memset是O(n) */