Submission #1116351

#	Time	Username	Problem	Language	Result	Execution time	Memory
1116351		staszic_ojuz	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	Compilation error	0 ms	0 KiB

foehn_phenomena

#include <bits/stdc++.h>
using namespace std;
using ll = long long;

int main()
{
    cin.tie(0);
    ios_base::sync_with_stdio(0);
    int n, q, s, t;
    cin >> n >> q >> s >> t;
    int pop, ter;
    cin >> pop;
    vector<int> roz;
    for(int i = 0; i < n; ++i)
    {
        cin >> ter;
        roz.push_back(ter - pop);
        pop = ter;
    }
    roz.push_back(0);
    ll odp = 0;
    for(int i = 0; i < n; ++i)
    {
        if(roz[i] > 0)
            odp -= s*roz[i];
        else
            odp -= t*roz[i];
    }
    for(int i = 0; i < q; ++i)
    {
        int l, r, x;
        cin >> l >> r >> x;
        int a = roz[l-1];
        if(r < n)
            int b = roz[r];
        roz[l-1] += x;
        if(r < n)
            roz[r] -= x;
        if(a > 0 && roz[l-1] <= 0)
            odp += s*a - t*roz[l-1];
        if(a <= 0 && roz[l-1] > 0)
            odp -= s*roz[l-1] - t*a;
        if(a > 0 && roz[l-1] > 0)
            odp += s*a - s*roz[l-1];
        if(a <= 0 && roz[l-1] <= 0)
            odp += t*a - t*roz[l-1];
        if(r >= n)
        {
            cout << odp << "\n";
            continue;
        }
        if(b > 0 && roz[r] <= 0)
            odp += s*b - t*roz[r];
        if(b <= 0 && roz[r] > 0)
            odp -= s*roz[r] - t*b;
        if(b > 0 && roz[r] > 0)
            odp += s*b - s*roz[r];
        if(b <= 0 && roz[r] <= 0)
            odp += t*b - t*roz[r];
        cout << odp << "\n";
    }
}

Compilation message (stderr)

foehn_phenomena.cpp: In function 'int main()':
foehn_phenomena.cpp:35:17: warning: unused variable 'b' [-Wunused-variable]
   35 |             int b = roz[r];
      |                 ^
foehn_phenomena.cpp:52:12: error: 'b' was not declared in this scope
   52 |         if(b > 0 && roz[r] <= 0)
      |            ^
foehn_phenomena.cpp:54:12: error: 'b' was not declared in this scope
   54 |         if(b <= 0 && roz[r] > 0)
      |            ^
foehn_phenomena.cpp:56:12: error: 'b' was not declared in this scope
   56 |         if(b > 0 && roz[r] > 0)
      |            ^
foehn_phenomena.cpp:58:12: error: 'b' was not declared in this scope
   58 |         if(b <= 0 && roz[r] <= 0)
      |            ^