Submission #292527

#	Time	Username	Problem	Language	Result	Execution time	Memory
292527		arnold518	Naan (JOI19_naan)	C++14	100 / 100	1805 ms	103544 KiB

naan

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

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int MAXN = 2000;

int N, L;
ll A[MAXN+10][MAXN+10];

struct Frac
{
	ll x, y;
	Frac() {}
	Frac(ll _x, ll _y)
	{
		x=_x; y=_y;
		norm();
	}
	void norm()
	{
		ll g=__gcd(x, y);
		x/=g; y/=g;
	}
};

bool operator >= (Frac p, Frac q) { p.norm(); q.norm(); return (__int128)p.y*q.x>=(__int128)q.y*p.x; }

Frac B[MAXN+10][MAXN+10];
bool vis[MAXN+10];
int ans[MAXN+10];

int main()
{
	scanf("%d%d", &N, &L);
	for(int i=1; i<=N; i++)
	{
		for(int j=1; j<=L; j++) scanf("%lld", &A[i][j]), A[i][j]+=A[i][j-1];
		for(int j=1, p=1; j<=N; j++)
		{
			for(; p<L && A[i][p]*N<=j*A[i][L]; p++);
			ll t=j*A[i][L]-N*A[i][p-1];
			B[i][j]=Frac(N*(A[i][p]-A[i][p-1]), (p-1)*N*(A[i][p]-A[i][p-1])+t);
			B[i][j].norm();
			//printf("(%lld %lld !%d) ", B[i][j].x, B[i][j].y, p);
		}
		//printf("\n");
	}

	for(int i=1; i<=N; i++)
	{
		Frac t; int val=-1;
		for(int j=1; j<=N; j++)
		{
			if(vis[j]) continue;
			if(val==-1 || t>=B[j][i]) val=j, t=B[j][i];
		}
		if(i<N) printf("%lld %lld\n", t.y, t.x);
		ans[i]=val;
		vis[val]=true;
	}
	for(int i=1; i<=N; i++) printf("%d ", ans[i]); printf("\n");
}

Compilation message (stderr)

naan.cpp: In function 'int main()':
naan.cpp:64:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   64 |  for(int i=1; i<=N; i++) printf("%d ", ans[i]); printf("\n");
      |  ^~~
naan.cpp:64:49: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   64 |  for(int i=1; i<=N; i++) printf("%d ", ans[i]); printf("\n");
      |                                                 ^~~~~~
naan.cpp:37:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   37 |  scanf("%d%d", &N, &L);
      |  ~~~~~^~~~~~~~~~~~~~~~
naan.cpp:40:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   40 |   for(int j=1; j<=L; j++) scanf("%lld", &A[i][j]), A[i][j]+=A[i][j-1];
      |                           ~~~~~^~~~~~~~~~~~~~~~~~

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