oj.uz

답안 #701340

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
701340 2023-02-21T02:29:09 Z Do_you_copy K개의 묶음 (IZhO14_blocks) C++17
0 / 100
 32 ms 80888 KB 
#include <bits/stdc++.h>
#define fi first
#define se second
#define faster ios_base::sync_with_stdio(0); cin.tie(0);
#define pb push_back

using namespace std;
using ll = long long;
using pii = pair <int, int>;

const int maxN = 1e5 + 1;
const ll inf = 0x3f3f3f3f3f3f3f3f;
//const int Mod =
int n, k;

ll dp[maxN][103];
int a[maxN];

void Solve(int x){
    vector <pair <int, ll>> S;
    vector <ll> T;
    S.pb({0, dp[0][x - 1]});
    T.pb(dp[0][x - 1]);
    for (int i = 1; i <= n; ++i){
        ll minn = inf;
        while (!S.empty() && a[S.back().fi] <= a[i]){
            minn = min(minn, S.back().se);
            T.pop_back();
            S.pop_back();
        }
        dp[i][x] = min(minn + a[i], T.back());
        minn = min(minn, dp[i][x - 1]);
        S.pb({i, minn});
        T.pb(min(T.back(), a[i] + minn));
    }
}

void Init(){
    cin >> n >> k;
    memset(dp, 0x3f, sizeof(dp));
    for (int i = 1; i <= n; ++i){
        cin >> a[i];
    }
    dp[0][0] = 0;
    for (int i = 1; i <= k; ++i){
        Solve(i);
    }
    cout << dp[n][k];
}

#define taskname "test"
signed main(){
    faster
    if (fopen(taskname ".inp", "r")){
        freopen(taskname ".inp", "r", stdin);
        freopen(taskname ".out", "w", stdout);
    }
    int tt = 1;
    //cin >> tt;
    while (tt--){
        Init();
    }
    if (fopen("timeout.txt", "r")){
        ofstream timeout("timeout.txt");
        cerr << "Time elapsed: " << signed(double(clock()) / CLOCKS_PER_SEC * 1000) << "ms\n";
        timeout << signed(double(clock()) / CLOCKS_PER_SEC * 1000);
        timeout.close();
    }
}

Compilation message

blocks.cpp: In function 'int main()':
blocks.cpp:55:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   55 |         freopen(taskname ".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
blocks.cpp:56:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   56 |         freopen(taskname ".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 31 ms 80844 KB Output is correct
2 Incorrect 31 ms 80872 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 31 ms 80812 KB Output is correct
2 Incorrect 32 ms 80888 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 31 ms 80844 KB Output is correct
2 Incorrect 31 ms 80872 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 47.0

# 결과 실행 시간 메모리 Grader output
1 Correct 31 ms 80844 KB Output is correct
2 Incorrect 31 ms 80872 KB Output isn't correct
3 Halted 0 ms 0 KB -