제출 #789464

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
789464		nasam	K개의 묶음 (IZhO14_blocks)	C++17	0 / 100	2 ms	3416 KiB

blocks

#include <bits/stdc++.h>
#define ll long long
#define FOR(i,a,b) for (int i = (a), _b = (b); i <= _b; i++)
#define FOD(i,b,a) for (int i = (b), _a = (a); i >= _a; i--)
#define FORE(i, v) for (__typeof((v).begin()) i = (v).begin(); i != (v).end(); i++)
#define ALL(v) (v).begin(), (v).end()
#define BIT(x, i) (((x) >> (i)) & 1)
#define MASK(i) (1LL << (i))
#define CNTBIT(x) __builtin_popcount(x)
#define fi first
#define se second
#define pb push_back
#define eb emplace_back
#define left ___left
#define right ___right
#define pii pair<int, int>
#define DEBUG(n, a) FOR (i, 1, n) cout << a[i] << ' '; cout << endl;1234567890
#define lob lower_bound // >=
#define upb upper_bound // >
#define endl "\n"

using namespace std;

template<class X, class Y> bool maximize(X &x, Y y){ if (x < y){ x = y; return true; } return false; }
template<class X, class Y> bool minimize(X &x, Y y){ if (x > y){ x = y; return true; } return false; }

#define  gogobruhbruh  ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);
#define  file(name)  if (fopen (name".inp", "r")) { freopen (name".inp", "r", stdin); freopen (name".out", "w", stdout); }

int MOD = 1e9 + 7;

int add(int &a, int b){ if ((a += b) >= MOD) a -= MOD; return a; }
int sub(int a, int b){ if ((a -= b) < 0) a += MOD; return a; }
int muti(int a, int b){ return (1LL * a * b) % MOD; }
int Pow(int x, int y){ int res = 1; for (; y; y >>= 1){ if (y & 1) res = muti(res, x); x = muti(x, x); } return res; }

const int MAX = 1e5 + 7;
const ll INF = 1e18 + 7;

int num, lim;
int val[MAX], L[MAX], R[MAX];
ll dp[MAX];
stack<int> st;

struct IT {
    ll tree[MAX << 2];

    void update(int id, int left, int right, int u, int v, ll val){
        if (v < left || right < u)
            return;
        if (u <= left && right <= v){
            minimize(tree[id], val);
            return;
        }
        int mid = (left + right) >> 1;
        update(id << 1, left, mid, u, v, val);
        update(id << 1 | 1, mid + 1, right, u, v, val);
        tree[id] = min(tree[id << 1], tree[id << 1 | 1]);
    }

    ll get(int id, int left, int right, int u, int v){
        if (v < left || right < u)
            return INF;
        if (u <= left && right <= v)
            return tree[id];
        int mid = (left + right) >> 1;
        return min(get(id << 1, left, mid, u, v),
        get(id << 1 | 1, mid + 1, right, u, v));
    }
} it;

void build(){
    FOD (i, num, 1){
        while (st.size() && val[st.top()] <= val[i])
            st.pop();
        if (st.empty())
            R[i] = num;
        else
            R[i] = st.top() - 1;
        st.push(i);
    }
    while (st.size())
        st.pop();
    FOR (i, 1, num){
        while (st.size() && val[st.top()] <= val[i])
            st.pop();
        if (st.empty())
            L[i] = 1;
        else
            L[i] = st.top() + 1;
        st.push(i);
    }
}

void solve(){
    build();
    memset(it.tree, 0x3f, sizeof(it.tree));
    FOR (j, 2, lim){
        FOR (i, 1, num){
            it.update(1, 0, num, i, R[i], dp[i]);
            dp[i] = it.get(1, 0, num, L[i] - 1, i - 1) + val[i];
//            cout << j << ' ' << i << ' ' << dp[i] << endl;
        }
    }
    cout << dp[num];
}

void read(){
    cin >> num >> lim;
    FOR (i, 1, num)
        cin >> val[i],
        dp[i] = max(dp[i - 1], 1LL * val[i]);
}

int main(){
    gogobruhbruh;
    file("main");
    int test = 1;
//    cin >> test;
    while (test--)
        read(),
        solve();
}

컴파일 시 표준 에러 (stderr) 메시지

blocks.cpp: In function 'int main()':
blocks.cpp:28:61: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   28 | #define  file(name)  if (fopen (name".inp", "r")) { freopen (name".inp", "r", stdin); freopen (name".out", "w", stdout); }
      |                                                     ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
blocks.cpp:117:5: note: in expansion of macro 'file'
  117 |     file("main");
      |     ^~~~
blocks.cpp:28:95: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   28 | #define  file(name)  if (fopen (name".inp", "r")) { freopen (name".inp", "r", stdin); freopen (name".out", "w", stdout); }
      |                                                                                       ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
blocks.cpp:117:5: note: in expansion of macro 'file'
  117 |     file("main");
      |     ^~~~

• Subtask 1: 0 / 14
• Subtask 2: 0 / 18
• Subtask 3: 0 / 21
• Subtask 4: 0 / 47