Submission #1270878

#	Time	Username	Problem	Language	Result	Execution time	Memory
1270878		sasde	Foehn Phenomena (JOI17_foehn_phenomena)	C++20	100 / 100	292 ms	18276 KiB

foehn_phenomena

#include<bits/stdc++.h>
using namespace std;
bool M1;
#define PI 3.14159265358979323846
#define sz(a) (int)a.size()
#define all(x) x.begin(),x.end()
#define ii pair<long long,int>
#define iii pair<int,ii>
#define iv pair<ii,ii>
#define se second
#define fi first
#define ffi fi.fi
#define sfi se.fi
#define sse se.se
#define fse fi.se
#define lt(i, c, d) for(int i = c; i <= d; ++i)
#define fl(i, c, d) for(int i = d; i >= c; --i)
#define pb push_back
#define int long long
#define emb emplace_back
#define emf emplace_front
#define em emplace
#define look_memory cerr<<abs(&M2-&M1)/1024.0/1024<<'\n'
#define look_time   cerr << "TIME : " << clock() * 0.001 << "s" <<'\n'
const int N=1e6+5,lg=30,mod=1e9+7;
mt19937 rd(chrono::steady_clock::now().time_since_epoch().count());
int Rand(int u,int v){
 return u+rd()%(v-u+1);
}
int dx[]={1,0,-1,0,1,1,-1,-1};
int dy[]={0,-1,0,1,1,-1,1,-1};
int node,query,s,t,a[N];


struct segmax {
    int n;
    vector<int> st, lazy;
    segmax() {};
    segmax(int _n): n(_n), st(n * 4 + 5, 0), lazy(n * 4 + 5, 0) {};

    void build(int id, int l, int r) {
        if (l == r) {
            st[id] = a[l];
            return;
        }
        int mid = (l + r) >> 1;
        build(id << 1, l, mid);
        build(id << 1 | 1, mid + 1, r);
        st[id] = max(st[id << 1], st[id << 1 | 1]);
    }

    void down(int id) {
        if (lazy[id] == 0) return;
        lazy[id << 1] += lazy[id];
        lazy[id << 1 | 1] += lazy[id];
        st[id << 1] += lazy[id];
        st[id << 1 | 1] += lazy[id];
        lazy[id] = 0;
    }

    void update(int id, int l, int r, int u, int v, int val) {
        if (r < u || l > v) return;
        if (l >= u && r <= v) {
            st[id] += val;
            lazy[id] += val;
            return;
        }
        down(id);
        int mid = (l + r) >> 1;
        update(id << 1, l, mid, u, v, val);
        update(id << 1 | 1, mid + 1, r, u, v, val);
    }

    int get(int id, int l, int r, int i) {
        if (r==l) return st[id];
        down(id);
        int mid = (l + r) >> 1;
        if(i<=mid)
        return get(id << 1, l, mid, i);
        return get(id << 1 | 1, mid + 1, r, i);
    }
};
long long ans;
bool M2;
void solve(){
    cin >> node>> query >> s >>t;
    segmax seg(node);
    for(int i=0;i<=node;++i){
        cin >> a[i];
    }
    seg.build(1,0,node);

    int up=0,down=0;
    for(int i=1;i<=node;++i){
        if(a[i]>a[i-1])up+=a[i]-a[i-1];
        else down+=a[i-1]-a[i];
    }
    while(query--){
        int l,r,x;
        cin >> l >> r >> x;
        int val=seg.get(1,0,node,l);
        int val1=seg.get(1,0,node,l-1);
        if(val>val1)up-=val-val1;
        else down-=val1-val;
        int val2,val3;
        if(r<node){
            val2=seg.get(1,0,node,r);
            val3=seg.get(1,0,node,r+1);
            if(val3>val2)up-=val3-val2;
            else down-=val2-val3;
        }   
        seg.update(1,0,node,l,r,x);
        val=seg.get(1,0,node,l);
        val1=seg.get(1,0,node,l-1);
        if(val>val1)up+=val-val1;
        else down+=val1-val;
        if(r<node){
            val2=seg.get(1,0,node,r);
            val3=seg.get(1,0,node,r+1);
            if(val3>val2)up+=val3-val2;
            else down+=val2-val3;
        }  
        // cout <<up<<" "<<down<<" "<<down*t<<" "<<up*s<<'\n';


        cout <<1LL*t*down-1LL*up*s<<'\n';
    }

    // cout << ans;
}
main()
{
  srand(time(0));
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    #define task "aws"
    if(fopen(task".inp","r")){
      freopen(task".inp","r",stdin);
      freopen(task".out","w",stdout);
    }
    int t=1;
 //   cin >> t;
while(t--){
    solve();cout<<'\n';
}
look_memory;
look_time;
}

Compilation message (stderr)

foehn_phenomena.cpp:131:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  131 | main()
      | ^~~~
foehn_phenomena.cpp: In function 'int main()':
foehn_phenomena.cpp:139:14: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  139 |       freopen(task".inp","r",stdin);
      |       ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
foehn_phenomena.cpp:140:14: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  140 |       freopen(task".out","w",stdout);
      |       ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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