Submission #391656

#	Time	Username	Problem	Language	Result	Execution time	Memory
391656		maomao90	Arcade (NOI20_arcade)	C++14	100 / 100	234 ms	16556 KiB

Arcade

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

#define mnto(x, y) x = min(x, (__typeof__(x)) y)
#define mxto(x, y) x = max(x, (__typeof__(x)) y)
#define REP(i, s, e) for (int i = s; i < e; i++)
#define RREP(i, s, e) for (int i = s; i >= e; i--)
typedef long long ll;
typedef long double ld;
#define MP make_pair
#define FI first
#define SE second
typedef pair<int, int> ii;
typedef pair<ll, ll> pll;
#define MT make_tuple
typedef tuple<int, int, int> iii;
#define ALL(_a) _a.begin(), _a.end()
#define pb emplace_back
typedef vector<int> vi;
typedef vector<ii> vii;

#define INF 1000000005
#define LINF 1000000000000000005
#define MOD 1000000007
#define MAXN 500005

int n, m;
ii ta[MAXN], xy[MAXN];
vi lis;

int main() {
	scanf("%d%d", &n, &m);
	REP (i, 0, m) {
		scanf("%d", &ta[i].FI);
	}
	REP (i, 0, m) {
		scanf("%d", &ta[i].SE);
	}
	REP (i, 0, m) {
		xy[i] = MP(ta[i].FI + ta[i].SE, (ta[i].FI - ta[i].SE));
	}
	sort(xy, xy + m);
	REP (i, 0, m) {
		int pos = lower_bound(ALL(lis), -xy[i].SE) - lis.begin();
		if (pos == lis.size()) {
			lis.pb(-xy[i].SE);
		} else {
			lis[pos] = -xy[i].SE;
		}
	}
	printf("%d\n", (int) lis.size());
	return 0;
}

Compilation message (stderr)

Arcade.cpp: In function 'int main()':
Arcade.cpp:45:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |   if (pos == lis.size()) {
      |       ~~~~^~~~~~~~~~~~~
Arcade.cpp:32:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   32 |  scanf("%d%d", &n, &m);
      |  ~~~~~^~~~~~~~~~~~~~~~
Arcade.cpp:34:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   34 |   scanf("%d", &ta[i].FI);
      |   ~~~~~^~~~~~~~~~~~~~~~~
Arcade.cpp:37:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   37 |   scanf("%d", &ta[i].SE);
      |   ~~~~~^~~~~~~~~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 11 / 11
• Subtask 3: 12 / 12
• Subtask 4: 21 / 21
• Subtask 5: 14 / 14
• Subtask 6: 20 / 20
• Subtask 7: 15 / 15