Submission #254023

#	Time	Username	Problem	Language	Result	Execution time	Memory
254023		TadijaSebez	Naan (JOI19_naan)	C++11	0 / 100	4 ms	512 KiB

naan

#include <bits/stdc++.h>
using namespace std;
#define ll long long
const int N=2005;
struct frac{
	ll p,q;
	frac(){}
	frac(ll a,ll b=1){if(b<0)a=-a,b=-b;ll g=__gcd(abs(a),b);a/=g;b/=g;p=a;q=b;}
	frac operator * (ll b) const {return frac(p*b,q);}
	frac operator - (frac b) const {return frac(p*b.q-b.p*q,q*b.q);}
	frac operator + (frac b) const {return frac(p*b.q+b.p*q,q*b.q);}
	frac operator * (frac b) const {return frac(p*b.p,q*b.q);}
	frac operator / (frac b) const {return frac(p*b.q,q*b.p);}
	bool operator < (frac b) const {return p*b.q<b.p*q;}
	void print(){printf("(%lld/%lld)",p,q);}
}p[N][N];
frac operator -= (frac&a,frac b){a=a-b;}
int v[N][N],sum[N],ans[N];
bool was[N];
int main(){
	int n,l;
	scanf("%i %i",&n,&l);
	for(int i=1;i<=n;i++){
		for(int j=1;j<=l;j++){
			scanf("%i",&v[i][j]);
			sum[i]+=v[i][j];
			v[i][j]*=n;
		}
		int take=0;
		for(int j=1,ptr=1;j<=n;j++){
			int need=sum[i];
			while(v[i][ptr]-take<need){
				need-=v[i][ptr]-take;
				take=0;
				ptr++;
			}
			p[i][j]=frac(ptr-1)+frac(take+need,v[i][ptr]);
			take+=need;
			assert(p[i][j-1]<p[i][j]);
		}
	}
	for(int i=1;i<=n;i++){
		frac mn=frac(l+1);
		int k;
		for(int j=1;j<=n;j++)if(!was[j]){
			if(p[j][i]<mn){
				mn=p[j][i];
				k=j;
			}
		}
		if(i!=n)printf("%lld %lld\n",mn.p,mn.q);
		ans[i]=k;
		was[k]=1;
	}
	for(int i=1;i<=n;i++)printf("%i ",ans[i]);
	return 0;
}

Compilation message (stderr)

naan.cpp: In function 'frac operator-=(frac&, frac)':
naan.cpp:17:40: warning: no return statement in function returning non-void [-Wreturn-type]
 frac operator -= (frac&a,frac b){a=a-b;}
                                        ^
naan.cpp: In function 'int main()':
naan.cpp:22:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%i %i",&n,&l);
  ~~~~~^~~~~~~~~~~~~~~
naan.cpp:25:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%i",&v[i][j]);
    ~~~~~^~~~~~~~~~~~~~~
naan.cpp:52:9: warning: 'k' may be used uninitialized in this function [-Wmaybe-uninitialized]
   ans[i]=k;
   ~~~~~~^~

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