Submission #364998

#	Time	Username	Problem	Language	Result	Execution time	Memory
364998		farhan132	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	100 / 100	133 ms	9068 KiB

foehn_phenomena

/***Farhan132***/

#include <bits/stdc++.h>
 
using namespace std;
 
typedef long long ll;
typedef unsigned long long ull;
typedef double dd;
typedef vector<ll> vll;
typedef pair<ll , ll> ii;
typedef vector< ii > vi;
typedef pair < pair < ll , ll > , pair < ll , ll > > cm; 
 
#define ff first
#define ss second
#define pb push_back
#define in insert
#define f0(b) for(int i=0;i<(b);i++)
#define f00(b) for(int j=0;j<(b);j++)
#define f1(b) for(int i=1;i<=(b);i++)
#define f11(b) for(int j=1;j<=(b);j++)
#define f2(a,b) for(int i=(a);i<=(b);i++)
#define f22(a,b) for(int j=(a);j<=(b);j++)
#define sf(a) scanf("%lld",&a)
#define sff(a,b) scanf("%lld %lld", &a , &b)
#define pf(a) printf("%lld\n",a)
#define pff(a,b) printf("%lld %lld\n", a , b)
#define PI 3.14159265359
#define bug printf("**!\n")
#define mem(a , b) memset(a, b ,sizeof(a))
#define front_zero(n) __builtin_clzll(n)
#define back_zero(n) __builtin_ctzll(n)
#define total_one(n) __builtin_popcountll(n)
#define clean fflush(stdout)

const ll mod =  (ll)1e9 + 7;
const ll maxn = (ll)2e5 + 5;
const int nnn = 1048590;
const int inf = numeric_limits<int>::max()-1;
//const ll INF = numeric_limits<ll>::max()-1;
//const ll INF = 1e18;
 
ll dx[]={0,1,0,-1};
ll dy[]={1,0,-1,0};
ll dxx[]={0,1,0,-1,1,1,-1,-1};
ll dyy[]={1,0,-1,0,1,-1,1,-1};



void solve(){

    ll n , q , s , t;
    cin >> n >> q >> s >> t;
    ll d[n+5] , a[n+5];
    f0(n+1) cin >> a[i];
    ll cur = 0;
    for(ll i = 1; i <= n; i++){
        d[i] = a[i] - a[i-1];
        if(a[i] > a[i-1]) cur -= (a[i] - a[i-1]) * s;
        else cur += (a[i-1] - a[i]) * t;
    }
    while(q--){
        ll l , r , x;
        cin >> l >> r >> x;
        ll sv = cur;
        if(d[l] > 0) cur += s * abs(d[l]);
        else cur -= t * abs(d[l]);
        d[l] += x;
        if(d[l] > 0) cur -= abs(d[l]) * s;
        else cur += abs(d[l]) * t;
        if(r+1 <= n){
          r++;
          if(d[r] > 0) cur += s * abs(d[r]);
          else cur -= t * abs(d[r]);
          d[r] -= x;
          if(d[r] > 0) cur -= abs(d[r]) * s;
          else cur += abs(d[r]) * t;
        }
        cout << cur << '\n';
    }
    
    return;
    
}

 
int main() {
    
    
    #ifdef LOCAL
        freopen("in.txt", "r", stdin);
        freopen("out.txt", "w", stdout);
    #else 
     //   freopen("cbarn2.in", "r", stdin);
     //   freopen("cbarn2.out", "w", stdout);
     ios_base::sync_with_stdio(0); cin.tie(NULL); cout.tie(NULL);
    #endif
    //cout << fixed << setprecision(10);
   // work(maxn);
    //  mem(b,0);
    ll T;
    T=1;
    //cin >> T; 
    //scanf("%lld",&T);
   // ll CT = 0;
    //work();
    while(T--){
        //cout << "Case " << ++CT <<": " ;
        //printf("Case %lld: ",++CT);
        solve();
    }
 
    return 0;
}

Compilation message (stderr)

foehn_phenomena.cpp: In function 'void solve()':
foehn_phenomena.cpp:66:12: warning: unused variable 'sv' [-Wunused-variable]
   66 |         ll sv = cur;
      |            ^~

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