Submission #203647

#	Time	Username	Problem	Language	Result	Execution time	Memory
203647		ics0503	Naan (JOI19_naan)	C++17	5 / 100	6 ms	504 KiB

naan

#include<stdio.h>
#include<set>
#include<vector>
using namespace std;
set<long long >people;
struct xy { long long x, y; } need[2121];
long long gcd(long long a, long long b) {
	if (b == 0)return a;
	return gcd(b, a%b);
}
struct xyz {
	long long x, y, z;
	void balance() {
		long long g = gcd(y, z);
		y /= g; z /= g;
	}
}L[2121];
bool cmp(xyz a, xyz b) {
	if (a.x != b.x) return a.x < b.x;
	return a.y * b.z < b.y * a.z;
}
long long v[2121][2121], S[2121][2121];
vector<int>ans;
int main() {
	long long n, l, i, j; scanf("%lld%lld", &n, &l);
	for (i = 1; i <= n; i++)people.insert(i);
	for (i = 1; i <= n; i++) {
		for (j = 1; j <= l; j++) {
			scanf("%lld", &v[i][j]), S[i][j] = S[i][j - 1] + v[i][j];
			need[i].x += v[i][j];
		}
		need[i].y = n;
		long long g = gcd(need[i].x, need[i].y);
		need[i].x /= g; need[i].y /= g;
	}
	long long befa = 1, befx = 0, befy = 1;
	long long befax = 0, befay = 1;
	for (i = 1; i <= n - 1; i++) {
		xyz mn = { l + 1,0,1 }; long long mnw = 0;
		for (long long who : people) {
			if ((befy - befx) * v[who][befa] * need[who].y > need[who].x * befy) {
				L[who].x = befa;
				L[who].y = need[who].x*befy - befx*need[who].y*v[who][befa];
				L[who].z = need[who].y*v[who][befa] * befy;
				L[who].balance();
			}
			else {
				while ((befy - befx) * v[who][befa] * need[who].y + (S[who][L[who].x] - S[who][befa]) * befy * need[who].y <= need[who].x * befy) {
					L[who].x++;
				}
				L[who].y = need[who].x*befy
					- (befy - befx)*v[who][befa] * need[who].y
					- (S[who][L[who].x - 1] - S[who][befa])*befy*need[who].y;
				L[who].z = v[who][L[who].x] * need[who].y * befy;
				L[who].balance();
			}
			if (cmp(L[who], mn)) {
				mn = L[who];
				mnw = who;
			}
		}

		long long xx = (mn.x - 1)*mn.z + mn.y, yy = mn.z;
		long long ansx = xx*befay - befax*yy, ansy = befay*yy;
		long long gg = gcd(ansx, ansy);
		ansx /= gg, ansy /= gg;
		printf("%lld %lld\n", ansx, ansy);
		befax = xx, befay = yy;
		befa = mn.x, befx = mn.y, befy = mn.z;
		people.erase(mnw);
		ans.push_back(mnw);
	}
	for (int i = 0; i < ans.size(); i++)printf("%d ", ans[i]);
	printf("%lld", *people.begin());
	return 0;
}

Compilation message (stderr)

naan.cpp: In function 'int main()':
naan.cpp:73:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < ans.size(); i++)printf("%d ", ans[i]);
                  ~~^~~~~~~~~~~~
naan.cpp:25:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  long long n, l, i, j; scanf("%lld%lld", &n, &l);
                        ~~~~~^~~~~~~~~~~~~~~~~~~~
naan.cpp:29:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%lld", &v[i][j]), S[i][j] = S[i][j - 1] + v[i][j];
    ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 0 / 24
• Subtask 3: 0 / 71