Submission #1136124

#	Time	Username	Problem	Language	Result	Execution time	Memory
1136124		vukhacminh	Foehn Phenomena (JOI17_foehn_phenomena)	C++20	100 / 100	95 ms	5700 KiB

foehn_phenomena

/**
*    Author :  Vu Khac Minh
*    Created : 08.03.2024
**/
#include <bits/stdc++.h>
#define MASK(x) ((1ll) << (x))
#define BIT(x, i) (((x) >> (i)) & (1))
#define c_bit(i) __builtin_popcountll(i) 
#define SET_ON(x, i) ((x) | MASK(i)) 
#define SET_OFF(x, i) ((x) & ~MASK(i)) 
#define ALL(v) (v).begin(), (v).end()
#define REP(i, n) for (int i = 0, _n = (n); i < _n; ++i)
#define FOR(i, a, b) for (int i = (a), _b = (b); i <= _b; ++i)
#define FORD(i, b, a) for (int i = (b), _a = (a); i >= _a; --i)
#define db(val) "["#val" = " << (val) << "] "
#define ll long long
using namespace std;
const int maxn = 2e5 + 5;
const int mod = 1e9+7;
void file()
{
    #define Task "ROUNDPRI"
    if(fopen(Task".inp","r"))
    {
        freopen(Task".inp","r",stdin);
        freopen(Task".out","w",stdout);
    }
}
ll pos,neg,a[maxn],n,last,s,t,nquery;
void update(int p,ll d)
{
    if(p<1 || p> n) return;
    if(a[p] > 0 ) pos-=a[p];
    else neg+=a[p];
    a[p]+=d;
    if(a[p] > 0) pos+=a[p];
    else neg-=a[p];
}
void solve()
{
    cin>>n>>nquery>>s>>t;
    FOR(i,0,n)
    {
        cin>>a[i];
        a[i]-=last;
        if(a[i]>0) pos+=a[i];
        else neg-=a[i];
        last+=a[i];
    }
    while(nquery--)
    {
        int l,r;
        ll d;
        cin >>l>>r>>d;
        update(l,d);
        update(r+1,-d);
        cout<<neg*t-pos*s<<'\n';
    }
}

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int ntest = 1;
    file();
    //cin >> ntest;
    while (ntest--)
    {
        solve();
    }

    return 0;
}

Compilation message (stderr)

foehn_phenomena.cpp: In function 'void file()':
foehn_phenomena.cpp:25:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   25 |         freopen(Task".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
foehn_phenomena.cpp:26:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   26 |         freopen(Task".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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