제출 #33276

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
33276		Dat160601	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	100 / 100	219 ms	5140 KiB

foehn_phenomena

#include <bits/stdc++.h>
using namespace std;
const int N=200007;
int n,q,l,r;
long long a[N],v,up,down,ans=0,dif[N];
int main(){
	scanf("%d %d %lld %lld",&n,&q,&up,&down);
	scanf("%lld",&a[0]);
	for(int i=1;i<=n;i++) scanf("%lld",&a[i]);
	for(int i=0;i<n;i++){
		if(a[i]<a[i+1]) ans-=up*abs(a[i]-a[i+1]);
		else ans+=down*abs(a[i]-a[i+1]);
	}
	for(int i=0;i<n;i++){
		dif[i]=a[i]-a[i+1];
	}
	while(q--){
		scanf("%d %d %lld",&l,&r,&v);
		long long old=dif[l-1];
		dif[l-1]-=v;
		if(old<0) ans+=up*(-old);
		else ans-=down*old;
		if(dif[l-1]<0) ans-=up*(-dif[l-1]);
		else ans+=down*dif[l-1];
		if(r<n){
			old=dif[r];
			dif[r]+=v;
			if(old<0) ans+=up*(-old);
			else ans-=down*old;
			if(dif[r]<0) ans-=up*(-dif[r]);
			else ans+=down*dif[r];
		}
		printf("%lld\n",ans);
	}
}

컴파일 시 표준 에러 (stderr) 메시지

foehn_phenomena.cpp: In function 'int main()':
foehn_phenomena.cpp:7:42: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d %lld %lld",&n,&q,&up,&down);
                                          ^
foehn_phenomena.cpp:8:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld",&a[0]);
                     ^
foehn_phenomena.cpp:9:43: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i=1;i<=n;i++) scanf("%lld",&a[i]);
                                           ^
foehn_phenomena.cpp:18:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d %lld",&l,&r,&v);
                               ^

• Subtask 1: 30 / 30
• Subtask 2: 10 / 10
• Subtask 3: 60 / 60