Submission #320980

#	Time	Username	Problem	Language	Result	Execution time	Memory
320980		zaneyu	Horses (IOI15_horses)	C++14	0 / 100	16 ms	8556 KiB

horses

/*input
3
2 1 3
3 4 1
1
2 1 2

*/
#include "horses.h"
#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
typedef tree<long long, null_type, less_equal<long long>, rb_tree_tag, tree_order_statistics_node_update> indexed_set;
#pragma GCC optimize("unroll-loops,no-stack-protector")
//order_of_key #of elements less than x
// find_by_order kth element
typedef long long int ll;
#define ld double
#define pii pair<ll,ll>
#define f first
#define s second
#define pb push_back
#define REP(i,n) for(ll i=0;i<n;i++)
#define REP1(i,n) for(int i=1;i<=n;i++)
#define FILL(n,x) memset(n,x,sizeof(n))
#define ALL(_a) _a.begin(),_a.end()
#define sz(x) (int)x.size()
const ll maxn=5e3+5;
const ll maxlg=__lg(maxn)+2;
const ll INF64=4e18;
const int INF=0x3f3f3f3f;
const ll MOD=(1e9+7);
const ll MOD2=1000002173;
const ld PI=acos(-1);
const ld eps=1e-9;
#define lowb(x) x&(-x)
#define MNTO(x,y) x=min(x,(__typeof__(x))y)
#define MXTO(x,y) x=max(x,(__typeof__(x))y)
#define SORT_UNIQUE(c) (sort(c.begin(),c.end()), c.resize(distance(c.begin(),unique(c.begin(),c.end()))))
#define GET_POS(c,x) (lower_bound(c.begin(),c.end(),x)-c.begin())
ll mult(ll a,ll b){
    return ((a%MOD)*(b%MOD))%MOD;
}
ll mypow(ll a,ll b,ll MOD){
    if(b<=0) return 1;
    ll res=1LL;
    while(b){
        if(b&1) res=(res*a)%MOD;
        a=(a*a)%MOD;
        b>>=1;
    }
    return res;
}
ll y[maxn];
ld pref[maxn];
int x[maxn];
ld md=log2(MOD);
multiset<ll> ms;
int n;
int init(int _n, int X[], int Y[]) {
	n=_n;
	REP1(i,n) pref[i]=pref[i-1]+(log2(X[i-1])),x[i]=X[i-1];
	REP1(i,n) y[i]=Y[i-1];
	ll ans=0;
	REP1(i,n){
		while(pref[i]>=md) pref[i]-=md;
		MXTO(ans,mult(pow(2.0,pref[i]),y[i]));
	}
	return ans;
}

int updateX(int pos, int val) {	
	x[pos+1]=val;
	REP1(i,n) pref[i]=pref[i-1]+(log2(x[i]));
	ll ans=0;
	REP1(i,n){
		while(pref[i]>=md) pref[i]-=md;

		MXTO(ans,mult(pow(2.0,pref[i]),y[i]));
	}
	return ans;
}

int updateY(int pos, int val) {
	y[pos+1]=val;
	REP1(i,n) pref[i]=pref[i-1]+(log2(x[i]));
	ll ans=0;
	REP1(i,n){
		while(pref[i]>=md) pref[i]-=md;
		//cout<<pow(2.0,pref[i])*y[i]<<'\n';
		MXTO(ans,mult(pow(2.0,pref[i]),y[i]));
	}
	return ans;
}

Compilation message (stderr)

horses.cpp: In function 'll mypow(ll, ll, ll)':
horses.cpp:46:26: warning: declaration of 'MOD' shadows a global declaration [-Wshadow]
   46 | ll mypow(ll a,ll b,ll MOD){
      |                          ^
horses.cpp:34:10: note: shadowed declaration is here
   34 | const ll MOD=(1e9+7);
      |          ^~~
horses.cpp: In function 'int init(int, int*, int*)':
horses.cpp:69:20: warning: conversion from 'double' to 'll' {aka 'long long int'} may change value [-Wfloat-conversion]
   69 |   MXTO(ans,mult(pow(2.0,pref[i]),y[i]));
      |                 ~~~^~~~~~~~~~~~~
horses.cpp:40:42: note: in definition of macro 'MXTO'
   40 | #define MXTO(x,y) x=max(x,(__typeof__(x))y)
      |                                          ^
horses.cpp:71:9: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   71 |  return ans;
      |         ^~~
horses.cpp: In function 'int updateX(int, int)':
horses.cpp:81:20: warning: conversion from 'double' to 'll' {aka 'long long int'} may change value [-Wfloat-conversion]
   81 |   MXTO(ans,mult(pow(2.0,pref[i]),y[i]));
      |                 ~~~^~~~~~~~~~~~~
horses.cpp:40:42: note: in definition of macro 'MXTO'
   40 | #define MXTO(x,y) x=max(x,(__typeof__(x))y)
      |                                          ^
horses.cpp:83:9: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   83 |  return ans;
      |         ^~~
horses.cpp: In function 'int updateY(int, int)':
horses.cpp:93:20: warning: conversion from 'double' to 'll' {aka 'long long int'} may change value [-Wfloat-conversion]
   93 |   MXTO(ans,mult(pow(2.0,pref[i]),y[i]));
      |                 ~~~^~~~~~~~~~~~~
horses.cpp:40:42: note: in definition of macro 'MXTO'
   40 | #define MXTO(x,y) x=max(x,(__typeof__(x))y)
      |                                          ^
horses.cpp:95:9: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   95 |  return ans;
      |         ^~~

• Subtask 1: 0 / 17
• Subtask 2: 0 / 17
• Subtask 3: 0 / 20
• Subtask 4: 0 / 23
• Subtask 5: 0 / 23