Submission #485763

#	Time	Username	Problem	Language	Result	Execution time	Memory
485763		MilosMilutinovic	Semiexpress (JOI17_semiexpress)	C++14	100 / 100	12 ms	4540 KiB

semiexpress

#include <bits/stdc++.h>
using namespace std;
#define rep(i,a,n) for (int i=a;i<n;i++)
#define per(i,a,n) for (int i=n-1;i>=a;i--)
#define pb push_back
#define mp make_pair
#define all(x) (x).begin(),(x).end()
#define fi first
#define se second
#define SZ(x) ((int)(x).size())
typedef vector<int> VI;
typedef long long ll;
typedef pair<int,int> PII;
typedef double db;
mt19937 mrand(random_device{}()); 
const ll mod=1000000007;
const ll mod2=998244353;
int rnd(int x) { return mrand() % x;}
ll powmod(ll a,ll b) {ll res=1;a%=mod; assert(b>=0); for(;b;b>>=1){if(b&1)res=res*a%mod;a=a*a%mod;}return res;}
ll gcd(ll a,ll b) { return b?gcd(b,a%b):a;}
// head

const int N=3010;
ll n,m,k,a,b,c,t,s[N];

int main() {
	scanf("%lld%lld%lld%lld%lld%lld%lld",&n,&m,&k,&a,&b,&c,&t);
	rep(i,1,m+1) scanf("%lld",s+i),--s[i];
	vector<ll> v;
	ll ans=0;
	rep(i,1,m) {
		ll pos=s[i];
		rep(j,0,k-m+1) {
			if (pos==s[i+1]||b*s[i]+c*(pos-s[i])>t) break;
			ll tm=t-b*s[i]-c*(pos-s[i]),nxt=min(s[i+1],pos+tm/a+1);
			if (pos==s[i]) ans+=nxt-pos;
			else v.pb(nxt-pos);
			pos=nxt;
		}
	}
	if (b*s[m]<=t) ans++;
	sort(all(v));
	reverse(all(v));
	rep(i,0,min((int)(k-m),SZ(v))) ans+=v[i];
	printf("%lld",ans-1);
}

Compilation message (stderr)

semiexpress.cpp: In function 'int main()':
semiexpress.cpp:27:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |  scanf("%lld%lld%lld%lld%lld%lld%lld",&n,&m,&k,&a,&b,&c,&t);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
semiexpress.cpp:28:20: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   28 |  rep(i,1,m+1) scanf("%lld",s+i),--s[i];
      |               ~~~~~^~~~~~~~~~~~

• Subtask 1: 18 / 18
• Subtask 2: 30 / 30
• Subtask 3: 52 / 52