Submission #1288108

#	Time	Username	Problem	Language	Result	Execution time	Memory
1288108		ilovewaguri	Foehn Phenomena (JOI17_foehn_phenomena)	C++20	30 / 100	14 ms	1796 KiB

foehn_phenomena

#include<bits/stdc++.h>
using namespace std;
#define NAME "TEST"
#define nl '\n'
#define allofa(x,sz) x,x+sz+1
#define allof(x) x.begin(),x.end()
#define mset(x,val) memset(x,val,sizeof(x))
template<class X,class Y> bool minimize(X &a, Y b){if(a>b){a=b;return true;}return false;};
template<class X,class Y> bool maximize(X &a, Y b){if(a<b){a=b;return true;}return false;};
typedef long long ll;
const ll mod = (long long)1e9+7;
const ll LINF = (long long)1e18;
const int INF = (int)1e9;
const int MAXN = (int)1e5+5;
ll diff[MAXN],res;
int a[MAXN];
int n,q,s,t;

void ccps() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
    if(fopen(NAME".inp","r")) {
        freopen(NAME".inp","r",stdin);
        freopen(NAME".out","w",stdout);
    }
}

void add(int i, int d) {
    ll val = diff[i];
    if(val>0) res-=1LL*s*d*val;
    else if(val<0) res+=1LL*t*d*llabs(val);
}

signed main() {
    ccps();
    cin >> n >> q >> s >> t;
    for (int i = 0; i<=n; i++) {
        cin >> a[i];
    }
    diff[0]=a[0];
    for (int i = 1; i<=n; i++) {
        diff[i]=a[i]-a[i-1];
        add(i,1);
    }
    while(q--) {
        int l,r,x; cin >> l >> r >> x;
        diff[l]+=x;
        diff[r+1]-=x;
        ll cur = 0;
        for (int i = 1; i<=n; i++) {
            ll val = diff[i];
            if(val>0) cur-=1LL*s*llabs(val);
            else cur+=1LL*t*llabs(val);
        }
        cout << cur << nl;
    }
}

Compilation message (stderr)

foehn_phenomena.cpp: In function 'void ccps()':
foehn_phenomena.cpp:23:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |         freopen(NAME".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
foehn_phenomena.cpp:24:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |         freopen(NAME".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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