Submission #1261582

#	Time	Username	Problem	Language	Result	Execution time	Memory
1261582		blueviolet	Stove (JOI18_stove)	C++20	50 / 100	231 ms	196580 KiB

stove

#include             <bits/stdc++.h>
    
#define             ll   long long
#define          io(x)   if (fopen(x".inp","r")) {freopen(x".inp","r",stdin),freopen(x".out","w",stdout);}
#define        TimeRun   {End=clock();cerr<<"Time run: "<<(float)(End-Begin)/CLOCKS_PER_SEC<<"s"<<el;}
#define      mem(c, x)   memset(c, x, sizeof(c))
#define         all(c)   c.begin(), c.end()
#define       bit(i,j)   ((i >> j) & 1)
#define             se   second     
#define             fi   first
#define             el   '\n'
using namespace std;  

template<class X, class Y> bool maximize(X &a, const Y &b) { return (a < b ? a = b, 1 : 0); }
template<class X, class Y> bool minimize(X &a, const Y &b) { return (a > b ? a = b, 1 : 0); }

int dx[8] = {0, 1, 0,-1, 1, 1,-1,-1};
int dy[8] = {1, 0,-1, 0, 1,-1,-1, 1};
const int  maxn  = 5e3 + 2;
const int  Inf   = 2e9 + 7;
const ll   Infll = 1e18 + 9;
const ll   Mod   = 1e9 + 7;
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
int n, k, a[maxn];
ll dp[maxn][maxn];

void solve() {
	cin >> n >> k;
	for (int i=1; i<=n; i++) cin >> a[i];
		
	for (int i=0; i<=n; i++) {
		for (int j=0; j<=k; j++) dp[i][j] = Infll;
	}
	dp[0][0] = 0;
	for (int i=1; i<=n; i++) {
		for (int j=1; j<=min(k, i); j++) {
			dp[i][j] = min(dp[i-1][j-1] + 1, dp[i-1][j] + a[i]-a[i-1]);
		}
	}
	cout << dp[n][k];
}

signed main() {
    
    ios_base::sync_with_stdio(false);  cin.tie(0); cout.tie(0); clock_t Begin = clock(), End;
    io("task"); 

    solve();
    
    TimeRun; return (0 ^ 0);
}

Compilation message (stderr)

stove.cpp: In function 'int main()':
stove.cpp:4:58: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    4 | #define          io(x)   if (fopen(x".inp","r")) {freopen(x".inp","r",stdin),freopen(x".out","w",stdout);}
      |                                                   ~~~~~~~^~~~~~~~~~~~~~~~~~~
stove.cpp:46:5: note: in expansion of macro 'io'
   46 |     io("task");
      |     ^~
stove.cpp:4:85: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    4 | #define          io(x)   if (fopen(x".inp","r")) {freopen(x".inp","r",stdin),freopen(x".out","w",stdout);}
      |                                                                              ~~~~~~~^~~~~~~~~~~~~~~~~~~~
stove.cpp:46:5: note: in expansion of macro 'io'
   46 |     io("task");
      |     ^~

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