Submission #1540576

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Source Code Expand

#include "bits/stdc++.h"
using namespace std;
#define rep(i,n) for(int (i)=0;(i)<(int)(n);++(i))
#define rer(i,l,u) for(int (i)=(int)(l);(i)<=(int)(u);++(i))
#define reu(i,l,u) for(int (i)=(int)(l);(i)<(int)(u);++(i))
static const int INF = 0x3f3f3f3f; static const long long INFL = 0x3f3f3f3f3f3f3f3fLL;
typedef vector<int> vi; typedef pair<int, int> pii; typedef vector<pair<int, int> > vpii; typedef long long ll;
template<typename T, typename U> static void amin(T &x, U y) { if (y < x) x = y; }
template<typename T, typename U> static void amax(T &x, U y) { if (x < y) x = y; }

int longestIncreaseSequence(int a[], int n) {
	vector<int> A(n, INF);
	for (int i = 0; i < n; i ++)
		*lower_bound(A.begin(), A.end(), a[i]) = a[i];
	return find(A.begin(), A.end(), INF) - A.begin();
}

int main() {
	const double weight = 4.292036732051034;
	const double weight2 = 11.415926535897931;
	int x1; int y1; int x2; int y2;
	while (~scanf("%d%d%d%d", &x1, &y1, &x2, &y2)) {
		int W = abs(x2 - x1), H = abs(y2 - y1);
		bool flipx = x1 > x2, flipy = y1 > y2;
		int N;
		scanf("%d", &N);
		vpii points;
		rep(i, N) {
			int X; int Y;
			scanf("%d%d", &X, &Y);
			X -= x1, Y -= y1;
			if (flipx) X = -X;
			if (flipy) Y = -Y;
			if (0 <= X && X <= W && 0 <= Y && Y <= H)
				points.emplace_back(X, Y);
		}
		sort(points.begin(), points.end());
		vi ys;
		for (auto p : points)
			ys.push_back(p.second);
		int num = ys.empty() ? 0 : longestIncreaseSequence(ys.data(), (int)ys.size());
		double ans = (W + H) * 100.;
		if (num < min(W, H) + 1) {
			ans -= num * weight;
		} else {
			ans -= (num - 1) * weight;
			ans += weight2;
		}
		printf("%.10f\n", ans);
	}
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:26:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &N);
                  ^
./Main.cpp:30:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d%d", &X, &Y);
                         ^

Judge Result