Submission #1106173

#	Time	Username	Problem	Language	Result	Execution time	Memory
1106173		icebear	Stove (JOI18_stove)	C++17	50 / 100	622 ms	262144 KiB

stove

// ~~ icebear ~~
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> ii;
typedef pair<ii, int> iii;

#define FOR(i,a,b) for(int i=(a); i<=(b); ++i)
#define FORR(i,a,b) for(int i=(a); i>=(b); --i)
#define rep(i, n) for(int i=0; i<(n); ++i)
#define red(i, n) for(int i=(n)-1; i>=0; --i)
#define mp make_pair
#define pb push_back
#define fi first
#define se second
#define all(x) x.begin(), x.end()
#define task "icebearat"

const int MOD = 1e9 + 7;
const int inf = 1e9 + 27092008;
const ll LLinf = 1e18 + 27092008;
const int N = 5000 + 5;
int n, k, t[N];
ll dp[N][N];

void solve() {
    cin >> n >> k;
    FOR(i, 1, n) cin >> t[i];
    memset(dp, 0x3f, sizeof dp);
    dp[0][0] = 0;
    FOR(i, 1, n) FOR(j, 1, k)
        dp[i][j] = min(dp[i - 1][j] + (t[i] + 1) - (t[i - 1] + 1), dp[i - 1][j - 1] + 1);
    cout << dp[n][k];
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    if (fopen(task".inp", "r")){
        freopen(task".inp", "r", stdin);
        freopen(task".out", "w", stdout);
    }
    int tc = 1;
//     cin >> tc;
    while(tc--) solve();
    return 0;
}

Compilation message (stderr)

stove.cpp: In function 'int main()':
stove.cpp:41:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
stove.cpp:42:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   42 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 0 / 50