Submission #289566

#	Time	Username	Problem	Language	Result	Execution time	Memory
289566		TadijaSebez	Treatment Project (JOI20_treatment)	C++11	0 / 100	3071 ms	2512 KiB

treatment

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define mp make_pair
const int N=100050;
const ll inf=9e18;
ll dp[N];
int n,m;
struct project{
	int t,l,r,c;
	project(){}
	project(int a,int b,int d,int e):t(a),l(b),r(d),c(e){}
	bool operator < (project b){
		if(r==n)return 0;
		if(b.r==n)return 1;
		return mp(r+t,r-t)<mp(b.r+b.t,b.r-b.t);
	}
}pro[N];
int main(){
	scanf("%i %i",&n,&m);
	for(int i=1;i<=m;i++)scanf("%i %i %i %i",&pro[i].t,&pro[i].l,&pro[i].r,&pro[i].c);
	sort(pro+1,pro+1+m);
	ll ans=inf;
	for(int i=1;i<=m;i++){
		if(pro[i].l==1)dp[i]=pro[i].c;
		else dp[i]=inf;
		for(int j=1;j<i;j++){
			int delta_t=abs(pro[i].t-pro[j].t);
			if(delta_t>pro[j].r+1-pro[i].l)continue;
			/*bool ok=0;
			if(pro[i].t<pro[j].t){
				int l=pro[i].l+(pro[j].t-pro[i].t);
				if(l<=pro[j].r+1)ok=1;
			}else{
				int r=pro[j].r-(pro[i].t-pro[j].t);
				if(r>=pro[i].l-1)ok=1;
			}
			if(ok)*/
				dp[i]=min(dp[i],dp[j]+pro[i].c);
		}
		if(pro[i].r==n)ans=min(ans,dp[i]);
	}
	printf("%lld\n",ans==inf?-1:ans);
	return 0;
}

Compilation message (stderr)

treatment.cpp: In function 'int main()':
treatment.cpp:20:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   20 |  scanf("%i %i",&n,&m);
      |  ~~~~~^~~~~~~~~~~~~~~
treatment.cpp:21:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   21 |  for(int i=1;i<=m;i++)scanf("%i %i %i %i",&pro[i].t,&pro[i].l,&pro[i].r,&pro[i].c);
      |                       ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 4
• Subtask 2: 0 / 5
• Subtask 3: 0 / 30
• Subtask 4: 0 / 61