#include // #include // #include // #include // #include // #include // #include // #include // #include // #include // #include // #include // #include // #include // #include // #include // #include using namespace std; // #pragma GCC optimize("Ofast,no-stack-protector")n // #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native") // #pragma GCC optimize("unroll-loops") #define ll long long int #define ull unsigned long long int #define vi vector< int > #define vll vector< ll > #define sc scanf #define pf printf #define cspf(i) pf("Case %d: ", i) #define spc pf(" ") #define line pf("\n") #define ff first #define ss second #define mp make_pair #define pb push_back #define ppb pop_back #define tp(v,j) get(v) #define Log(b,x) (log(x)/log(b)) #define FOR(i,x,y) for(int i = int(x); i < int(y); i++) #define ROF(i,x,y) for(int i = int(x)-1; i >= int(y); i--) #define clr(arr,x) memset(arr, x, sizeof arr) #define vout(v) for(int w=0;w<(int)v.size();w++){if(w) spc; cout< inline T bigMod(T p,T e,T M){T ret=1; for(;e>0;e>>=1){ if(e&1) ret=(ret*p)%M; p=(p*p)%M;} return (T)ret;} template inline T modInverse(T a,T M){return bigMod(a,M-2,M);} template inline T gcd(T a,T b){if(b==0)return a;return gcd(b,a%b);} template inline T lcm(T a,T b) {a=abs(a);b=abs(b); return (a/gcd(a,b))*b;} template inline T SQR(T a){return a*a;} int dx[] = { 1,-1, 0, 0}; //graph moves int dy[] = { 0, 0, 1,-1}; //graph moves ll digitsum(ll x){ ll sum=0; while(x){ ll y = x%10; sum+=(y*y); x/=10; } return sum; } int dp[100000]; int DFS(ll n){ if(dp[n]!=-1) return dp[n]; if(n==1) return 0; else if(n<10) return MAX; return dp[n] = 1+DFS(digitsum(n)); } void precalc(){ for(int i=1; i<100000; i++) dp[i]=-1; for(int i=1; i<100000; i++){ dp[i] = 1+DFS(digitsum(i)); } // cout<>l>>r){ if(ca) cout<<'\n'; ca++; for(int i=l; i<=r; i++){ if(dp[i]> Runtime: %.10fs\n", (double) (clock() - tStart) / CLOCKS_PER_SEC); #endif return 0; }