Submission #206331

#TimeUsernameProblemLanguageResultExecution timeMemory
206331okoHorses (IOI15_horses)C++14
54 / 100
1589 ms53160 KiB
#include "horses.h" #include <stdio.h> #include <stdlib.h> #include <bits/stdc++.h> using namespace std; long long n,a[500500],b[500500],mod=1e9+7,tree[2005000],mxtree[2005000]; multiset<int>ms; long long qrx(int nod,int l,int r,int x,int y) { if(x<=l&&r<=y)return tree[nod]; else if(r<x||y<l)return 1ll; int mid=(l+r)/2; return (qrx(nod*2,l,mid,x,y)*qrx(nod*2+1,mid+1,r,x,y))%mod; } long long qry(int nod,int l,int r,int x,int y) { if(x<=l&&r<=y)return mxtree[nod]; else if(r<x||y<l)return 0ll; int mid=(l+r)/2; return max(qry(nod*2,l,mid,x,y),qry(nod*2+1,mid+1,r,x,y)); } long long slov() { long long x=1,ans=0,st; multiset<int>::iterator it=--ms.end(),its; while(1) { int i=*it; x*=a[i]; if(x>(long long)2e9)break; its=it; if(it==ms.begin())break; it--; } st=*its; if(st)ans=b[st-1]; x=1; for(its;its!=ms.end();its++) { int i=*its,nxt; x*=a[i]; if(its==--ms.end())nxt=n; else { multiset<int>::iterator nxti=its; nxti++; nxt=*nxti; } ans=max(ans,x*qry(1,0,n+5,i,nxt-1)); } ans%=mod; ans*=qrx(1,0,n+5,0,st-1); return ans%mod; } void upy(int nod,int l,int r,int x,long long val) { if(x<l||r<x)return; if(l==r) { mxtree[nod]=val; return; } int mid=(l+r)/2; upy(nod*2,l,mid,x,val); upy(nod*2+1,mid+1,r,x,val); mxtree[nod]=max(mxtree[nod*2],mxtree[nod*2+1]); } void upx(int nod,int l,int r,int x,long long val) { if(x<l||r<x)return; if(l==r) { tree[nod]=val; return; } int mid=(l+r)/2; upx(nod*2,l,mid,x,val); upx(nod*2+1,mid+1,r,x,val); tree[nod]=(tree[nod*2]*tree[nod*2+1])%mod; } int init(int N, int X[], int Y[]) { n=N; for(int i=0;i<n;i++) { a[i]=X[i]; b[i]=Y[i]; ms.insert(i); upx(1,0,n+5,i,a[i]); upy(1,0,n+5,i,b[i]); } return slov(); } int updateX(int pos, int val) { a[pos]=val; upx(1,0,n+5,pos,val); return slov(); } int updateY(int pos, int val) { b[pos]=val; upy(1,0,n+5,pos,val); return slov(); }

Compilation message (stderr)

horses.cpp: In function 'long long int slov()':
horses.cpp:38:12: warning: statement has no effect [-Wunused-value]
     for(its;its!=ms.end();its++)
            ^
horses.cpp:42:32: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
         if(its==--ms.end())nxt=n;
                                ^
horses.cpp:49:32: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
         ans=max(ans,x*qry(1,0,n+5,i,nxt-1));
                               ~^~
horses.cpp:52:19: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
     ans*=qrx(1,0,n+5,0,st-1);
                  ~^~
horses.cpp:52:26: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
     ans*=qrx(1,0,n+5,0,st-1);
                        ~~^~
horses.cpp: In function 'int init(int, int*, int*)':
horses.cpp:89:18: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
         upx(1,0,n+5,i,a[i]);
                 ~^~
horses.cpp:90:18: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
         upy(1,0,n+5,i,b[i]);
                 ~^~
horses.cpp:92:16: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
     return slov();
            ~~~~^~
horses.cpp: In function 'int updateX(int, int)':
horses.cpp:97:14: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
     upx(1,0,n+5,pos,val);
             ~^~
horses.cpp:98:16: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
     return slov();
            ~~~~^~
horses.cpp: In function 'int updateY(int, int)':
horses.cpp:103:14: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
     upy(1,0,n+5,pos,val);
             ~^~
horses.cpp:104:16: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
     return slov();
            ~~~~^~
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