제출 #126007

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
126007		kjp4155	수열 (APIO14_sequence)	C++17	100 / 100	563 ms	87952 KiB

sequence

#include <bits/stdc++.h>

using namespace std;

#define VA_NUM_ARGS(...) VA_NUM_ARGS_IMPL_((0,__VA_ARGS__, 6,5,4,3,2,1))
#define VA_NUM_ARGS_IMPL_(tuple) VA_NUM_ARGS_IMPL tuple
#define VA_NUM_ARGS_IMPL(_0,_1,_2,_3,_4,_5,_6,N,...) N
#define macro_dispatcher(macro, ...) macro_dispatcher_(macro, VA_NUM_ARGS(__VA_ARGS__))
#define macro_dispatcher_(macro, nargs) macro_dispatcher__(macro, nargs)
#define macro_dispatcher__(macro, nargs) macro_dispatcher___(macro, nargs)
#define macro_dispatcher___(macro, nargs) macro ## nargs
#define Debug1(a)           cout<<#a<<"="<<(a)<<"\n"
#define Debug2(a,b)         cout<<#a<<"="<<(a)<<", "<<#b<<"="<<(b)<<"\n"
#define Debug3(a,b,c)       cout<<#a<<"="<<(a)<<", "<<#b<<"="<<(b)<<", "<<#c<<"="<<(c)<<"\n"
#define Debug4(a,b,c,d)     cout<<#a<<"="<<(a)<<", "<<#b<<"="<<(b)<<", "<<#c<<"="<<(c)<<", "<<#d<<"="<<(d)<<"\n"
#define Debug5(a,b,c,d,e)   cout<<#a<<"="<<(a)<<", "<<#b<<"="<<(b)<<", "<<#c<<"="<<(c)<<", "<<#d<<"="<<(d)<<", "<<#e<<"="<<(e)<<"\n"
#define Debug6(a,b,c,d,e,f) cout<<#a<<"="<<(a)<<", "<<#b<<"="<<(b)<<", "<<#c<<"="<<(c)<<", "<<#d<<"="<<(d)<<", "<<#e<<"="<<(e)<<", "<<#f<<"="<<(f)<<"\n"
#define Debug(...) macro_dispatcher(Debug, __VA_ARGS__)(__VA_ARGS__)
#define DA(a,s,n) cout<<#a<<"=["; printarray(a,s,n); cout<<"]\n"

#define TT1 template<class T>
#define TT1T2 template<class T1, class T2>
#define TT1T2T3 template<class T1, class T2, class T3>
template<class T, size_t N> ostream& operator << (ostream& os, const array<T, N>& v);
TT1T2 ostream& operator << (ostream& os, const pair<T1, T2>& p){ return os <<"("<<p.first<<", "<< p.second<<")"; }
TT1 ostream& operator << (ostream& os, const vector<T>& v){       bool f=1;os<<"[";for(auto& i : v) { if (!f)os << ", ";os<<i;f=0;}return os << "]"; }
template<class T, size_t N> ostream& operator << (ostream& os, const array<T, N>& v) {     bool f=1;os<<"[";for(auto& i : v) { if (!f)os << ", ";os<<i;f=0;}return os << "]"; }
TT1T2 ostream& operator << (ostream& os, const set<T1, T2>&v){    bool f=1;os<<"[";for(auto& i : v) { if (!f)os << ", ";os<<i;f=0;}return os << "]"; }
TT1T2 ostream& operator << (ostream& os, const multiset<T1,T2>&v){bool f=1;os<<"[";for(auto& i : v) { if (!f)os << ", ";os<<i;f=0;}return os << "]"; }
TT1T2T3 ostream& operator << (ostream& os, const map<T1,T2,T3>& v){ bool f = 1; os << "["; for (auto& ii : v) { if (!f)os << ", "; os << "(" << ii.first << " -> " << ii.second << ") "; f = 0; }return os << "]"; }
TT1T2 ostream& operator << (ostream& os, const multimap<T1, T2>& v){ bool f = 1; os << "["; for (auto& ii : v) { if (!f)os << ", "; os << "(" << ii.first << " -> " << ii.second << ") "; f = 0; }return os << "]"; }
TT1T2 ostream& operator << (ostream& os, priority_queue<T1, T2> v) { bool f = 1; os << "["; while (!v.empty()) { auto x = v.top(); v.pop(); if (!f) os << ", "; f = 0; os << x; } return os << "]"; }
TT1T2 void printarray(const T1& a, T2 l, T2 r){ for (T2 i = l; i<=r; i++) cout << a[i] << (i<r?" ":""); }

void cio(){
    ios::sync_with_stdio(false);
    cin.tie(NULL);
    cout << setprecision(15);
}

#define tt() printf("%.4f sec\n", (double) clock() / CLOCKS_PER_SEC )

typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

#define Fi first
#define Se second
#define pb(x) push_back(x)
#define sz(x) (int)x.size()
#define rep(i, n) for(int i=0;i<n;i++)
#define repp(i, n) for(int i=1;i<=n;i++)
#define all(x) x.begin(), x.end()
#define geti1(X) cin >> X
#define geti2(X,Y) cin >> X >> Y
#define geti3(X,Y,Z) cin >> X >> Y >> Z
#define geti4(X,Y,Z,W) cin >> X >> Y >> Z >> W
#define GET_MACRO(_1,_2,_3,_4,NAME,...) NAME
#define geti(...) GET_MACRO(__VA_ARGS__, geti4, geti3, geti2, geti1) (__VA_ARGS__)

#define endl '\n'

typedef tuple<ll,ll,ll> t3;
typedef tuple<ll,ll,ll,ll> t4;
void die(){printf("-1\n"); exit(0);}
int xx[8] = {1,-1,0,0,1,1,-1,-1}, yy[8] = {0,0,1,-1,1,-1,1,-1};
const ll mod = 1e9+9;

int N,K;
ll a[100010], S[100010];
ll dp[100010];
int prv[205][100010];

struct Line{
    ll a,b,idx;
};
Line dq[100010];
Line line[2][100010];
int l, r;

inline ll f(Line a, ll x){
    return a.a * x + a.b; 
}

int main(){
    scanf("%d%d",&N,&K);
    repp(i,N) scanf("%lld",&a[i]);
    repp(i,N) S[i] = S[i-1] + a[i];

    for(int k=0;k<=K;k++){
        l = r = 0;
        for(int i=k+1;i<=N;i++){
            if( k == 0 ) dp[i] = 0;
            else{
                // insert at back
                dq[r++] = line[k&1][i-1];
                while( r-l >= 3 ){
                    int i1 = r-1, i2 = r-2, i3 = r-3;
                    if( (dq[i3].b-dq[i1].b)*(dq[i2].a-dq[i3].a) <= (dq[i3].b-dq[i2].b)*(dq[i1].a-dq[i3].a) ){
                        r--;
                        dq[r-1] = dq[r];
                    }
                    else break;
                }            

                // proceed at front
                while( r-l >= 2 ){
                    if( f(dq[l],S[i]) <= f(dq[l+1],S[i]) ) l++;
                    else break;
                }
                dp[i] = f(dq[l], S[i]);
                prv[k][i] = dq[l].idx;
            }
            Line nl = {S[i], dp[i]-S[i]*S[i], i};
            line[!(k&1)][i] = nl;
        }
        
        //for(int i=k+1;i<=N;i++) line[i] = nline[i];
    }

    printf("%lld\n",dp[N]);
    vector<int> ansv;
    int idx = N;
    for(int k=K;k>=1;k--){
        ansv.push_back(prv[k][idx]);
        idx = prv[k][idx];
        if( !( 1 <= idx && idx <= N-1 ) ) break;
    }
    sort(all(ansv));
    for(auto e : ansv) printf("%d ",e); printf("\n");
    //tt();
}

컴파일 시 표준 에러 (stderr) 메시지

sequence.cpp: In function 'int main()':
sequence.cpp:131:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     for(auto e : ansv) printf("%d ",e); printf("\n");
     ^~~
sequence.cpp:131:41: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
     for(auto e : ansv) printf("%d ",e); printf("\n");
                                         ^~~~~~
sequence.cpp:87:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&N,&K);
     ~~~~~^~~~~~~~~~~~~~
sequence.cpp:88:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     repp(i,N) scanf("%lld",&a[i]);
               ~~~~~^~~~~~~~~~~~~~

• Subtask 1: 11 / 11
• Subtask 2: 11 / 11
• Subtask 3: 11 / 11
• Subtask 4: 17 / 17
• Subtask 5: 21 / 21
• Subtask 6: 29 / 29