Submission #71579

#	Time	Username	Problem	Language	Result	Execution time	Memory
71579		mr_banana	Horses (IOI15_horses)	C++17	Compilation error	0 ms	0 KiB

horses

#include <bits/stdc++.h>
#include "horses.h"

using namespace std;
const int MN=5e5+100,mod=1e9+7;
int n,x[MN],y[MN],seg[4*MN],mulx=1;
set<int,greater<int> > more;
int powm(int x1,int y1){
    if(y1==0){
        return 1;
    }
    int ans=powm(x1,y1/2);
    ans=(1ll*ans*ans)%mod;
    if(y1&1){
        ans=(1ll*ans*x1)%mod;
    }
    return ans;
}
void build(int v=1,int s=0,int e=n){
    if(e-s<2){
        seg[v]=y[s];
        return ;
    }
    int mid=(s+e)/2;
    build(2*v,s,mid);
    build(2*v+1,mid,e);
    seg[v]=max(seg[2*v],seg[2*v+1]);
}
void st(int p,int val,int v=1,int s=0,int e=n){
    if(e-s<2){
        seg[v]=val;
        return;
    }
    int mid=(s+e)/2;
    if(p<mid){
        st(p,val,2*v,s,mid);
    }
    else{
        st(p,val,2*v+1,mid,e);
    }
    seg[v]=max(seg[2*v],seg[2*v+1]);
}
int get(int l,int r,int v=1,int s=0,int e=n){
    /*if(l<=s && e<=r){
        return seg[v];
    }
    if(l>=e || s>=r){
        return 0;
    }
    int mid=(s+e)/2;
    return max(get(l,r,2*v,s,mid),get(l,r,2*v+1,mid,e));*/
    int mx=0;
    for(int i=l;i<r;i++){
        mx=max(mx,y[i]);
    }
    return mx;
}
int ans(){
    /*long long mul=1,mulm=1,ym=0;
    for(int i:more){
        int yi=get(i,n);
        if(mulm*yi>mul*ym){
            ym=yi;
            mulm=mul;
        }
        mul=mul*x[i];
        if(mul>mod){
            break;
        }
    }*/
    long long ans1=0,ym,=0,mul=mulx;
    for(int i=n-1;i>=0;i--){
        ym=max(ym,y[i]);
        ans1=max(ans1,mul*ym);
        mul/=x[i];
    }
    return ans1%mod;//(1ll*((mulx*powm(mulm,mod-2))%mod)*ym)%mod;
}
int init(int N, int X[], int Y[]) {
    n=N;
    for(int i=0;i<n;i++){
        x[i]=X[i];
        mulx=(1ll*mulx*x[i])%mod;
        y[i]=Y[i];
        if(x[i]>1){
            more.insert(i);
        }
    }
    more.insert(0);
    build();
	return ans();
}

int updateX(int pos, int val) {
    if(pos>0 && x[pos]>1 && val<2){
        more.erase(pos);
    }
    if(pos>0 && x[pos]<2 && val>1){
        more.insert(pos);
    }
    mulx=(1ll*mulx*powm(x[pos],mod-2))%mod;
    x[pos]=val;
    mulx=(1ll*mulx*x[pos])%mod;
	return ans();
}

int updateY(int pos, int val) {
	y[pos]=val;
    st(pos,val);
	return ans();
}

Compilation message (stderr)

horses.cpp: In function 'int powm(int, int)':
horses.cpp:13:22: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
     ans=(1ll*ans*ans)%mod;
         ~~~~~~~~~~~~~^~~~
horses.cpp:15:25: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
         ans=(1ll*ans*x1)%mod;
             ~~~~~~~~~~~~^~~~
horses.cpp: In function 'int get(int, int, int, int, int)':
horses.cpp:43:27: warning: unused parameter 'v' [-Wunused-parameter]
 int get(int l,int r,int v=1,int s=0,int e=n){
                           ^
horses.cpp:43:35: warning: unused parameter 's' [-Wunused-parameter]
 int get(int l,int r,int v=1,int s=0,int e=n){
                                   ^
horses.cpp:43:43: warning: unused parameter 'e' [-Wunused-parameter]
 int get(int l,int r,int v=1,int s=0,int e=n){
                                           ^
horses.cpp: In function 'int ans()':
horses.cpp:71:25: error: expected unqualified-id before '=' token
     long long ans1=0,ym,=0,mul=mulx;
                         ^
horses.cpp:73:23: error: no matching function for call to 'max(long long int&, int&)'
         ym=max(ym,y[i]);
                       ^
In file included from /usr/include/c++/7/bits/specfun.h:45:0,
                 from /usr/include/c++/7/cmath:1914,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:41,
                 from horses.cpp:1:
/usr/include/c++/7/bits/stl_algobase.h:219:5: note: candidate: template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)
     max(const _Tp& __a, const _Tp& __b)
     ^~~
/usr/include/c++/7/bits/stl_algobase.h:219:5: note:   template argument deduction/substitution failed:
horses.cpp:73:23: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
         ym=max(ym,y[i]);
                       ^
In file included from /usr/include/c++/7/bits/specfun.h:45:0,
                 from /usr/include/c++/7/cmath:1914,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:41,
                 from horses.cpp:1:
/usr/include/c++/7/bits/stl_algobase.h:265:5: note: candidate: template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)
     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
     ^~~
/usr/include/c++/7/bits/stl_algobase.h:265:5: note:   template argument deduction/substitution failed:
horses.cpp:73:23: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
         ym=max(ym,y[i]);
                       ^
In file included from /usr/include/c++/7/algorithm:62:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:65,
                 from horses.cpp:1:
/usr/include/c++/7/bits/stl_algo.h:3462:5: note: candidate: template<class _Tp> constexpr _Tp std::max(std::initializer_list<_Tp>)
     max(initializer_list<_Tp> __l)
     ^~~
/usr/include/c++/7/bits/stl_algo.h:3462:5: note:   template argument deduction/substitution failed:
horses.cpp:73:23: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
         ym=max(ym,y[i]);
                       ^
In file included from /usr/include/c++/7/algorithm:62:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:65,
                 from horses.cpp:1:
/usr/include/c++/7/bits/stl_algo.h:3468:5: note: candidate: template<class _Tp, class _Compare> constexpr _Tp std::max(std::initializer_list<_Tp>, _Compare)
     max(initializer_list<_Tp> __l, _Compare __comp)
     ^~~
/usr/include/c++/7/bits/stl_algo.h:3468:5: note:   template argument deduction/substitution failed:
horses.cpp:73:23: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
         ym=max(ym,y[i]);
                       ^
horses.cpp:74:23: error: 'mul' was not declared in this scope
         ans1=max(ans1,mul*ym);
                       ^~~
horses.cpp:74:23: note: suggested alternative: 'mulx'
         ans1=max(ans1,mul*ym);
                       ^~~
                       mulx
horses.cpp:77:16: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
     return ans1%mod;//(1ll*((mulx*powm(mulm,mod-2))%mod)*ym)%mod;
            ~~~~^~~~
horses.cpp: In function 'int init(int, int*, int*)':
horses.cpp:83:29: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
         mulx=(1ll*mulx*x[i])%mod;
              ~~~~~~~~~~~~~~~^~~~
horses.cpp: In function 'int updateX(int, int)':
horses.cpp:101:39: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
     mulx=(1ll*mulx*powm(x[pos],mod-2))%mod;
          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~
horses.cpp:103:27: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
     mulx=(1ll*mulx*x[pos])%mod;
          ~~~~~~~~~~~~~~~~~^~~~