Submission #129363

#	Time	Username	Problem	Language	Result	Execution time	Memory
129363		LittleFlowers__	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	100 / 100	137 ms	7800 KiB

foehn_phenomena

#include <bits/stdc++.h>
using namespace std;
#define in ({int x=0;int c=getchar(),n=0;for(;!isdigit(c);c=getchar()) n=(c=='-');for(;isdigit(c);c=getchar()) x=x*10+c-'0';n?-x:x;})
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int rnd(int l,int r){return l+rng()%(r-l+1);}
#define fasty ios_base::sync_with_stdio(false),cin.tie(nullptr);
#define task "Foehn"
#define forinc(a,b,c) for(int a=b,_c=c;a<=_c;++a)
#define fordec(a,b,c) for(int a=b,_c=c;a>=_c;--a)
#define forv(a,b) for(auto&a:b)
#define gg exit(0)
#define fi first
#define se second
#define pb push_back
#define ii pair<int,int>
#define mt make_tuple
#define all(a) a.begin(),a.end()
#define reset(f, x) memset(f, x, sizeof(f))
#define bit(x,i) ((x>>(i-1))&1)
#define on(x,i) (x|(1ll<<(i-1)))
#define off(x,i) (x&~(1<<(i-1)))
main(){
    //freopen(task".inp","r",stdin);
    //freopen(task".out","w",stdout);
    #define int long long
    int n=in,q=in,s=in,t=in,tmp=0;
    vector<int> a(n+1),b(n+1);
    forinc(i,0,n) a[i]=in;
    auto eval=[&](int i){
        return  i<0 ? i*s : i*t;
    };
    forinc(i,1,n){
        b[i]=a[i-1]-a[i];
        tmp+=eval(b[i]);
    }
    forinc(i,1,q){
        int l=in,r=in,x=in;
        if(l){
            tmp-=eval(b[l]);
            b[l]-=x;
            tmp+=eval(b[l]);
        }
        if(r<n){
            tmp-=eval(b[r+1]);
            b[r+1]+=x;
            tmp+=eval(b[r+1]);
        }
        cout<<tmp<<"\n";
    }
}

Compilation message (stderr)

foehn_phenomena.cpp:22:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^

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