Submission #649708

#	Time	Username	Problem	Language	Result	Execution time	Memory
649708		PoonYaPat	Horses (IOI15_horses)	C++14	Compilation error	0 ms	0 KiB

horses

#include "horses.h"
#include "grader.cpp"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

int n;
const ll mod=1e9+7;
ll fen[500001];

ll quick(ll a, ll m) {
    ll ans=1;
    while (m) {
        if (m%2==1) ans=(ans*a)%mod;
        a=(a*a)%mod;
        m/=2;
    }
    return ans;
}

ll find_fen(int x) {
    ll mul=1;
    while (x) {
        mul=(mul*fen[x])%mod;
        x-=(x&-x);
    }
    return mul;
}

void update_fen(int x, ll ol, ll ne) {
    while (x<=n) {
        fen[x]=(fen[x]*quick(ol,mod-2))%mod;
        fen[x]=(fen[x]*ne)%mod;
        x+=(x&-x);
    }
}

ll ms[1<<21],x[500001],y[500001];

void update_ms(int l, int r, int idx, int x, ll val) {
    if (l>x || x>r) return;
    if (l==r) ms[idx]=val;
    else {
        int mid=(l+r)/2;
        update_ms(l,mid,2*idx,x,val);
        update_ms(mid+1,r,2*idx+1,x,val);
        if (ms[2*idx]==-1 || ms[2*idx+1]==-1) ms[idx]=-1;
        else {
            if (ms[2*idx]*ms[2*idx+1]>1e9) ms[idx]=-1;
            else ms[idx]=ms[2*idx]*ms[2*idx+1];
        }
    }
}

ll query_ms(int l, int r, int idx, int x, int y) {
    if (l>y || r<x) return 1;
    if (x<=l && r<=y) return ms[idx];

    int mid=(l+r)/2;
    ll ml=query_ms(l,mid,2*idx,x,y), mr=query_ms(mid+1,r,2*idx+1,x,y);

    if (ml==-1 || mr==-1) return -1;
    else {
        if (ml*mr>1e9) return -1;
        else return ml*mr;
    }
}

int check(int a, int b) { //whether who is bigger between s[a] and a[b]
    ll h=query_ms(0,n-1,1,a+1,b);
    if (h==-1) return b;
    if (y[a]>y[b]*h) return a;
    else return b;
}

ll s[1<<21];

void update(int l, int r, int idx) {
    if (l==r) s[idx]=l;
    else {
        int mid=(l+r)/2;
        update(l,mid,2*idx);
        update(mid+1,r,2*idx+1);
        s[idx]=check(s[2*idx],s[2*idx+1]);
    }
}

void update2(int l, int r, int idx, int x, int y) {
    if (l>y || r<x) return;
    if (x<=l && y<=r) return;
    else {
        int mid=(l+r)/2;
        update2(l,mid,2*idx,x,y);
        update2(mid+1,r,2*idx+1,x,y);
        s[idx]=check(s[2*idx],s[2*idx+1]);
    }
}

void update3(int l, int r, int idx, int x) {
    if (l>x || x>r) return;
    if (l==r) return;
    else {
        int mid=(l+r)/2;
        update3(l,mid,2*idx,x);
        update3(mid+1,r,2*idx+1,x);
        s[idx]=check(s[2*idx],s[2*idx+1]);
    }
}

int init(int N, int X[], int Y[]) {
    n=N;
    for (int i=1; i<=500000; ++i) fen[i]=1;
    for (int i=0; i<n; ++i) x[i]=X[i],y[i]=Y[i], update_ms(0,n-1,1,i,x[i]), update_fen(i+1,1,x[i]);
    update(0,n-1,1);

	return (find_fen(s[1]+1)*y[s[1]])%mod;
}

int updateX(int pos, int val) {
    update_fen(pos,x[pos],val);
    x[pos]=val;
    update_ms(0,n-1,1,pos,val);
    update2(0,n-1,1,pos,n-1);

	return (find_fen(s[1]+1)*y[s[1]])%mod;
}

int updateY(int pos, int val) {
    y[pos]=val;
    update3(0,n-1,1,pos);

	return (find_fen(s[1]+1)*y[s[1]])%mod;
}

Compilation message (stderr)

horses.cpp:2:10: fatal error: grader.cpp: No such file or directory
    2 | #include "grader.cpp"
      |          ^~~~~~~~~~~~
compilation terminated.