제출 #340544

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
340544		MilosMilutinovic	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	10 / 100	793 ms	17772 KiB

foehn_phenomena

#include <bits/stdc++.h>
using namespace std;
#define ll long long
const int N=200050;
int n,q;
ll s,t,a[N],st[N*20],lzy[N*20];
void Build(int c,int l,int r){
    if(l>r)return;
    if(l==r){st[c]=a[l];return;}
    int mid=l+r>>1;
    Build(c*2+1,l,mid);Build(c*2+2,mid+1,r);
    st[c]=st[c*2+1]+st[c*2+2];
}
ll Get(int c,int l,int r,int ss,int se){
    if(lzy[c]!=0){
        st[c]+=lzy[c]*(r-l+1);
        lzy[c*2+1]=lzy[c],lzy[c*2+2]=lzy[c],lzy[c]=0;
    }
    if(l>r||l>se||r<ss)return (ll)0;
    if(l>=ss&&r<=se)return st[c];
    int mid=l+r>>1;
    return Get(c*2+1,l,mid,ss,se)+Get(c*2+2,mid+1,r,ss,se);
}
void Add(int c,int l,int r,int ss,int se,int val){
    if(l>r||r<ss||l>se)return;
    if(l>=ss&&r<=se){lzy[c]+=val;return;}
    int mid=l+r>>1;
    Add(c*2+1,l,mid,ss,se,val);
    Add(c*2+2,mid+1,r,ss,se,val);
}
ll B(int id){return Get(0,0,n,id,id);}
int main(){
    scanf("%i %i %lld %lld",&n,&q,&s,&t);
    for(int i=0;i<=n;i++)scanf("%lld",&a[i]);
    ll ans=0;
    for(int i=0;i<n;i++){
        if(a[i]<a[i+1])ans-=(a[i+1]-a[i])*s;
        else ans+=(a[i]-a[i+1])*t;
    }
    Build(0,0,n);
    while(q--){
        int l,r,val;
        scanf("%i %i %i",&l,&r,&val);
        if(l>0){
            ll x=B(l-1),y=B(l);
            if(x>y)ans-=(x-y)*t;
            else ans+=(y-x)*s;
        }
        if(r<n){
            ll x=B(r),y=B(r+1);
            if(x>y)ans-=(x-y)*t;
            else ans+=(y-x)*s;
        }
        Add(0,0,n,l,r,val);
        if(l>0){
            ll x=B(l-1),y=B(l);
            if(x>y)ans+=(x-y)*t;
            else ans-=(y-x)*s;
        }
        if(r<n){
            ll x=B(r),y=B(r+1);
            if(x>y)ans+=(x-y)*t;
            else ans-=(y-x)*s;
        }
        printf("%lld\n",ans);
    }
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

foehn_phenomena.cpp: In function 'void Build(int, int, int)':
foehn_phenomena.cpp:10:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   10 |     int mid=l+r>>1;
      |             ~^~
foehn_phenomena.cpp: In function 'long long int Get(int, int, int, int, int)':
foehn_phenomena.cpp:21:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   21 |     int mid=l+r>>1;
      |             ~^~
foehn_phenomena.cpp: In function 'void Add(int, int, int, int, int, int)':
foehn_phenomena.cpp:27:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   27 |     int mid=l+r>>1;
      |             ~^~
foehn_phenomena.cpp: In function 'int main()':
foehn_phenomena.cpp:33:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   33 |     scanf("%i %i %lld %lld",&n,&q,&s,&t);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
foehn_phenomena.cpp:34:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   34 |     for(int i=0;i<=n;i++)scanf("%lld",&a[i]);
      |                          ~~~~~^~~~~~~~~~~~~~
foehn_phenomena.cpp:43:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   43 |         scanf("%i %i %i",&l,&r,&val);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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