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| #include <bits/stdc++.h> #include <numeric> #define all(vec) vec.begin(),vec.end() #define PB push_back #define EB emplace_back #define EM emplace #define FI first #define SE second #define pct __builtin_popcountll #define ctz __builtin_ctzll #define SZ(a) ((long long) a.size()) #define FOR(i, a, b) for (long long i = (a); i <= (b); ++i) #define ROF(i, a, b) for (long long i = (a); i >= (b); --i) #define debug(var) cerr << #var <<":"<<var<<"\n"; #define cend cerr<<"\n-----------\n" #define lson(var) (var<<1) #define rson(var) (var<<1|1) #define fsp(x) fixed<<setprecision(x) #define minn(vec) *min_element(vec.begin(),vec.end()) #define maxx(vec) *max_element(vec.begin(),vec.end()) using namespace std; #ifdef LOCAL template<typename T> void _print(T x) { cerr << x; }
template<typename T> void _print(vector<T> v) { cerr << "[ "; for (T i : v) _print(i), cerr << " "; cerr << "]"; } template<typename T> void _print(set<T> s) { cerr << "{ "; for (T i : s) _print(i), cerr << " "; cerr << "}"; } template<typename T, typename U> void _print(pair<T, U> p) { cerr << "{"; _print(p.first); cerr << ", "; _print(p.second); cerr << "}"; } template<typename T, typename U> void _print(map<T, U> m) { cerr << "{ "; for (auto &p : m) _print(p), cerr << " "; cerr << "}"; }
template<typename T> void _print(vector<vector<T>> v){cerr<<"{\n";for (auto i : v) _print(i), cerr << "\n";cerr<<" }";} #endif
using ll = long long;using ull = unsigned long long; using DB=double;using LD=long double; using i128 = __int128; using pdd = pair<DB,DB>;using plb = pair<ll,bool>; using pll = pair<ll,ll>;using vll=vector<ll>;using vb=vector<bool>; using tll = tuple<ll,ll,ll>;using vii=vector<int>; using vpll = vector<pll>;using vtll = vector<tll>; using vdb = vector<DB>;using vc=vector<char>; using arr3 = array<ll,3> ;using arr2 = array<ll,2>; using CD=complex<double>; static constexpr ll MAXN=(ll)1e6+10,INF=(ll)1e17+3; static constexpr ll mod=(ll)1e9+7; static constexpr double eps=1e-8;const double pi=acos(-1.0); ll N,M,Q,X,K,T,lT,L;
inline void __(); signed main() { ios::sync_with_stdio(false); cin.tie(0);cout.tie(0); __(); return 0; }
inline ll MOD(const ll &a,const ll &b){ ll res=a%b; if(res<0) res+=b; return res; } inline void __(){ cin>>N>>M>>L; vll A(N+5); FOR(i,1,N){ cin>>A[i]; } vector<vll> g(L+5,vll(M+5)); auto cal=[&](ll x,ll obj){ if(x/M*M+obj>=x){ return x/M*M+obj-x; }else{ return (x+M-1)/M*M+obj-x; } }; FOR(i,1,L){ FOR(j,0,M-1){ ll res=0; for(int p=i;p<=N;p+=L){ res+=cal(A[p],j); } g[i][j]=res; } } vector<vll> dp(L+5,vll(M+5,INF)); dp[0][0]=0; FOR(i,1,L){ FOR(sum,0,M-1){ FOR(j,0,M-1){ ll res=MOD(sum-j,M); dp[i][sum]=min(dp[i-1][res]+g[i][j],dp[i][sum]); } } } #ifdef LOCAL _print(dp); _print(g); #endif ll ans=dp[L][0]; cout<<ans; }
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