Submission #339272

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
339272	2020-12-25 03:09:27	Kevin_Zhang_TW	Railway (BOI17_railway)	C++17	100 / 100	261 ms	30436 KiB

railway

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#include<bits/stdc++.h>
#define pb emplace_back
#define AI(i) begin(i), end(i)
template<class T>
bool chmax(T &val, T nv) {
  return val < nv ? (val = nv, true) : false;
}
template<class T>
bool chmin(T &val, T nv) {
  return nv < val ? (val = nv, true) : false;
}
using namespace std;
using ll = long long;
#ifdef KEV
#define DE(args...) kout("[ " + string(#args) + " ] = ", args)
void debug(auto L, auto R) { while (L < R) cerr << *L << " \n"[L+1==R], ++L; }
void kout(){ cerr << endl; }
template<class T1, class ...T2> void kout(T1 a, T2 ...e) { cerr << a << ' ', kout(e...); }
#else
#define DE(...) 0
#define debug(...) 0
#endif
// What I should check
// 1. overflow
// 2. corner cases
// Enjoy the problem instead of hurrying to AC
// Good luck !
int32_t main() {
  ios_base::sync_with_stdio(0), cin.tie(0);
 
 
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Compilation message (stderr)

railway.cpp: In function 'int32_t main()':
railway.cpp:114:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  114 |   for (int i = 1;i < vec.size();++i)
      |                  ~~^~~~~~~~~~~~
railway.cpp:21:20: warning: statement has no effect [-Wunused-value]
   21 | #define debug(...) 0
      |                    ^
railway.cpp:120:3: note: in expansion of macro 'debug'
  120 |   debug(AI(par));
      |   ^~~~~
railway.cpp:20:17: warning: statement has no effect [-Wunused-value]
   20 | #define DE(...) 0
      |                 ^
railway.cpp:137:29: note: in expansion of macro 'DE'
  137 |  for (int i = 1;i <= n;++i) DE(i, pf[i]);
      |                             ^~

• Subtask 1: 8 / 8
• Subtask 2: 15 / 15
• Subtask 3: 7 / 7
• Subtask 4: 29 / 29
• Subtask 5: 16 / 16
• Subtask 6: 25 / 25