제출 #1283113

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1283113		Faisal_Saqib	Foehn Phenomena (JOI17_foehn_phenomena)	C++20	30 / 100	226 ms	6672 KiB

foehn_phenomena

/* 
    VENI VIDI VICI
*/
#ifndef ONLINE_JUDGE
#include <iostream>
#include <vector>
#include <algorithm>
#include <set>
#include <map>
#include <string>
#include <numeric>
#include <chrono>
#include <random>
#include <cmath>
#include <utility>
#include <fstream>

using namespace std;

#define ff first
#define ss second
#define pb push_back
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()

mt19937 RNG(chrono::steady_clock::now().time_since_epoch().count());  

using i128 = __int128;
using ll = long long;
using ull = unsigned long long;
using ld = long double;
using str = string;
using pi = pair<int, int>;
using pl = pair<ll, ll>;

using vi = vector<int>;
using vl = vector<ll>;
using vpi = vector<pair<int, int>>;
using vvi = vector<vi>;
using sll = set<ll>;

template<class T>
istream& operator>>(istream& is, vector<T>& v) {
    for(auto &i:v) is>>i;
    return is;
}
template<class T1,class T2>
istream& operator>>(istream& is, pair<T1,T2>& p) {
    is>>p.fi>>p.se;
    return is;
}
template<class T>
ostream& operator<<(ostream& os, const vector<T>& v) {
    for(const auto &i:v) os<<i<<' ';
    return os;
}
template<class T1,class T2>
ostream& operator<<(ostream& os, const pair<T1,T2>& p) {
    os<<p.fi<<' '<<p.se; return os;
}
void pyn(bool x)
{
    cout<<(x?"YES":"NO")<<endl;
}
void pYN(bool x)
{
    cout<<(x?"Yes":"No")<<endl;
}
void pAB(bool x)
{
    cout<<(x?"Alice":"Bob")<<endl;
}
ll powmod(ll a,ll b,ll modulo)
{
  if(b==0){
    return 1;
  }
  ll temp=powmod(a,b/2,modulo);
  if(b%2==0){
    return (temp*temp)%modulo;
  }
  else{
    return (a*((temp*temp)%modulo))%modulo;
  }
}
bool Prime(ll n){
    for (ll i = 2; i*i <= n; i++)
        if (n % i == 0)
            return false;
    return (n>1);
}
void readIO() {
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
}
#endif
void solve();
int main() {
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    // readIO();

    int uwu=1;

    // cin>>uwu;

    for(int tc=1;tc<=uwu;tc++) {
        // cout<<"Case #"<<tc<<": ";
        solve();
    }
    return 0;
}
const int N=2e5+10;
ll a[N],fen[N],s,t;
void add(int i,int v)
{
    i++;
    while(i<N)
    {
        fen[i]+=v;
        i+=(i&-i);
    }
}
ll get(int x)
{
    x++;
    ll ans=0;
    while(x>0)
    {
        ans+=fen[x];
        x-=(x&-x);
    }
    return ans;
}
ll vala(int i)
{
    return a[i]+get(i);
}
void Update(int l,int r,int x)
{
    add(l,x);
    add(r+1,-x);
    // we want to add in the range [l,r]
    // add to prefix [1,r]
    // substract
}
ll wind=0;
void contro(int i,ll v=1) // a[i-1]<a[i]
{
    int p=vala(i-1),q=vala(i);
    // cout<<"Contro "<<i<<' '<<p<<' '<<q<<' '<<v<<endl;
    if(p<q)
    {
        wind-=v*(q-p)*s;
    }
    else{
        wind+=v*(p-q)*t;
    }
}
void solve()
{
    ll n,q;
    cin>>n>>q>>s>>t;
    for(int i=0;i<=n;i++)cin>>a[i];
    for(int i=1;i<=n;i++)
    {
        contro(i,1);
    }
    // cout<<"Init"<<endl;
    // cout<<wind<<endl;

    for(int i=0;i<q;i++)
    {
        int l,r,x;
        cin>>l>>r>>x;
        // a[l-1] a[l]+x a[l+1]+x  .. a[r]+x a[r+1]
        contro(l,-1);
        if(r<n)
            contro(r+1,-1);
        Update(l,r,x);
        contro(l,1);
        if(r<n)
            contro(r+1,1);
        // for(int i=0;i<=n;i++)
        // {
        //     cout<<vala(i)<<' ';
        // }
        // cout<<endl;
        cout<<wind<<endl;
    }
}

컴파일 시 표준 에러 (stderr) 메시지

foehn_phenomena.cpp: In function 'void readIO()':
foehn_phenomena.cpp:93:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   93 |     freopen("input.txt", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
foehn_phenomena.cpp:94:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   94 |     freopen("output.txt", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

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