Submission #155209

#TimeUsernameProblemLanguageResultExecution timeMemory
155209kungfulonStove (JOI18_stove)C++14
100 / 100
25 ms2236 KiB
#include <bits/stdc++.h> #define rep(i,a,b) for(int i = (a);i <= (b);i++) #define repd(i,a,b) for(int i = (a);i >= (b);i--) #define PB push_back #define F first #define S second #define Task "stove" using namespace std; template <class T> T read(T &a){a = 0;char c = cin.get();bool nega = 0;while(!isdigit(c) && c != '-') c = cin.get();if(c == '-') nega = 1,c = cin.get();a = c - 48;c = cin.get();while(isdigit(c)) a = a * 10 + c - 48,c = cin.get();if(nega) a = -a;return a;} template <class T> void writep(T a){if(a > 9) writep(a / 10);cout.put(a % 10 + 48);} template <class T> void write(T a){if(a < 0) cout.put('-'),a = -a;writep(a);cout.put(' ');} template <class T> void writeln(T a){write(a);cout.put('\n');} const int N = 100012; int n,k,a[N],b[N]; int main() { ios::sync_with_stdio(0);cin.tie(0);cout.tie(0); // ifstream cin (Task".inp"); // ofstream cout (Task".out"); cin >> n >> k; rep(i,1,n) cin >> a[i]; rep(i,2,n) b[i] = a[i] - a[i-1] - 1; sort(b+2,b+n+1,greater<int>()); int ans = a[n] - a[1] + 1; rep(i,2,k) ans -= b[i]; cout << ans; return 0; }
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