Submission #129308

#	Time	Username	Problem	Language	Result	Execution time	Memory
129308		taozai281	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	0 / 100	698 ms	4608 KiB

foehn_phenomena

#include<bits/stdc++.h>
using namespace std;
int n,q,s,t;
int a[200010];
int b[200010];
int l,r,x;
int cal(int x){
	if(x<0){
		return x*s;
	}
	return x*t;
}
int main(){
	scanf("%d%d%d%d",&n,&q,&s,&t);
	for(int i=0;i<=n;i++)
	{
		scanf("%d",&a[i]);
	}

	long long res=0;
	for(int i=1;i<=n;i++){
		b[i]=a[i-1]-a[i];
		res+=cal(b[i]);
	}
	
	while(q--){
      scanf("%d%d%d",&l,&r,&x);
        res -= cal(b[l]);
        b[l] -= x;
        res += cal(b[l]);
        if (r < n) {
            res -= cal(b[r + 1]);
            b[r + 1] += x;
            res += cal(b[r + 1]);
        }
		cout<<res<<endl;
	}
	
	
}

Compilation message (stderr)

foehn_phenomena.cpp: In function 'int main()':
foehn_phenomena.cpp:14:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d%d",&n,&q,&s,&t);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
foehn_phenomena.cpp:17:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&a[i]);
   ~~~~~^~~~~~~~~~~~
foehn_phenomena.cpp:27:12: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
       scanf("%d%d%d",&l,&r,&x);
       ~~~~~^~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 30
• Subtask 2: 0 / 10
• Subtask 3: 0 / 60