Submission #689747

#	Time	Username	Problem	Language	Result	Execution time	Memory
689747		zeroesandones	Discharging (NOI20_discharging)	C++17	Compilation error	0 ms	0 KiB

Discharging

#include "bits/stdc++.h"
using namespace std;

typedef long long ll;
typedef long double ld;
typedef vector<ll> vi;
typedef pair<ll, ll> pi;

#define for(i, j, k) for (ll i = j; i < (ll) k; ++i)
#define ford(i, j, k) for (ll i = j; i >= (ll) k; --i)
#define nl "\n"
#define sp " "

#define all(x) (x).begin(), (x).end()
#define sc second
#define fr first
#define pb emplace_back

const ll inf = 1e15;

void solve()
{
    ll n;
    cin >> n;

    ll t[n + 1];
    for(i, 1, n + 1)
        cin >> t[i];

    ll dp[n + 1] = {};
    for(i, 1, n + 1) {
        dp[i] = inf;
        ll mx = 0;
        ford(j, i, 1) {
            mx = max(mx, t[j]);
            dp[i] = min(dp[i], dp[j - 1] + (n - j + 1) * mx);
        }
    }

    cout << dp[n] << nl;
}

signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(null);

    ll t = 1;
    // cin >> t;
    while (t--)
    {
        solve();
    }
}

Compilation message (stderr)

Discharging.cpp:34:21: error: macro "for" requires 3 arguments, but only 1 given
   34 |         ford(j, i, 1) {
      |                     ^
Discharging.cpp:9: note: macro "for" defined here
    9 | #define for(i, j, k) for (ll i = j; i < (ll) k; ++i)
      | 
Discharging.cpp: In function 'void solve()':
Discharging.cpp:34:23: error: expected '(' before '{' token
   34 |         ford(j, i, 1) {
      |                       ^
      |                       (
Discharging.cpp:34:23: error: expected primary-expression before '{' token
Discharging.cpp:38:5: error: expected primary-expression before '}' token
   38 |     }
      |     ^
Discharging.cpp:37:10: error: expected ';' before '}' token
   37 |         }
      |          ^
      |          ;
   38 |     }
      |     ~     
Discharging.cpp:38:5: error: expected primary-expression before '}' token
   38 |     }
      |     ^
Discharging.cpp:37:10: error: expected ')' before '}' token
   37 |         }
      |          ^
      |          )
   38 |     }
      |     ~     
Discharging.cpp:34:23: note: to match this '('
   34 |         ford(j, i, 1) {
      |                       ^
Discharging.cpp:38:5: error: expected primary-expression before '}' token
   38 |     }
      |     ^
Discharging.cpp:33:12: warning: unused variable 'mx' [-Wunused-variable]
   33 |         ll mx = 0;
      |            ^~
Discharging.cpp: In function 'int main()':
Discharging.cpp:46:13: error: 'null' was not declared in this scope; did you mean 'll'?
   46 |     cin.tie(null);
      |             ^~~~
      |             ll