Submission #76856

#	Time	Username	Problem	Language	Result	Execution time	Memory
76856		Vardanyan	Stove (JOI18_stove)	C++14	20 / 100	581 ms	209388 KiB

stove

#include <bits/stdc++.h>
using namespace std;
const int N = 5007;
long long a[N];
long long dp[N][N];
int main(){
    int n,k;
    scanf("%d%d",&n,&k);
    queue<pair<int,int> > q;
    for(int i = 1;i<=n;i++){
           if(i>1) q.push({i,1});
            scanf("%lld",&a[i]);
            for(int j = 0;j<=k;j++) dp[i][j] = 100000000000000005;
    }
    for(int kk = 1;kk<=k;kk++){
        dp[1][kk] = 1;
        /*for(int i = 2;i<=n;i++){
            dp[i][kk] = min(dp[i][kk],dp[i-1][kk]+((a[i]+1)-(a[i-1]+1)));
            dp[i][kk+1] = min(dp[i][kk+1],dp[i-1][kk]+1);
        }*/
        while(!q.empty()){
            pair<int,int> x = q.front();
            if(x.second>kk) break;
            q.pop();
            int i = x.first;
            long long u = dp[i-1][kk]+((a[i]+1)-(a[i-1]+1));
            if(dp[i][kk]>u){
                dp[i][kk] = u;
                q.push({i+1,kk+1});
            }
            u = dp[i-1][kk]+1;
            if(dp[i][kk+1]>u){
                dp[i][kk+1] = u;
                q.push({i+1,kk+1});
            }
        }
    }
    printf("%lld\n",dp[n][k]);
    return 0;
}

Compilation message (stderr)

stove.cpp: In function 'int main()':
stove.cpp:8:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&n,&k);
     ~~~~~^~~~~~~~~~~~~~
stove.cpp:12:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%lld",&a[i]);
             ~~~~~^~~~~~~~~~~~~~

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