oj.uz

Submission #621251

# Submission time Handle Problem Language Result Execution time Memory
621251 2022-08-03T15:39:34 Z A_D Horses (IOI15_horses) C++14
17 / 100
 1500 ms 46460 KB 
#include "horses.h"
 
#include <bits/stdc++.h>
 
using namespace std;
 
const int N=1e6+100;
const long long MOD=1e9+7;
const long long L=32;
long long x[N];
long long y[N];
set<int> st;
long long sum=1;
int n;
vector<int> vec;
long long seg[4*N];
 
long long po(long long b,long long p)
{
    if(p==0)return 1;
    if(p==1)return b;
    if(p%2){
        return (b*po(b,p-1))%MOD;
    }
    long long r=po(b,p/2);
    return (r*r)%MOD;
}
 
 
long long modinv(int v)
{
    return po(v,MOD-2);
}
 
 
 
 
void build(int p,int s,int e)
{
    if(s==e){
        seg[p]=y[s];
        return;
    }
    int mid=(s+e)/2;
    build(p*2,s,mid);
    build(p*2+1,mid+1,e);
    seg[p]=max(seg[p*2],seg[p*2+1]);
}
 
void update(int p,int s,int e,int i,int val)
{
    if(s==e){
        seg[p]=val;
        return;
    }
    int mid=(s+e)/2;
    if(i<=mid){
        update(p*2,s,mid,i,val);
    }
    else{
        update(p*2+1,mid+1,e,i,val);
    }
    seg[p]=max(seg[p*2],seg[p*2+1]);
}
 
long long get(int p,int s,int e,int a,int b)
{
    if(a<=s&&e<=b){
        return seg[p];
    }
    if(s>b||e<a)return 0;
    int mid=(s+e)/2;
    return max(get(p*2,s,mid,a,b),get(p*2+1,mid+1,e,a,b));
}
void filvec()
{
    vec.clear();
    int cnt=0;
    for(auto x:st){
        vec.push_back(-x);
        cnt++;
        if(cnt==L)continue;
    }
    reverse(vec.begin(),vec.end());
}
long long getansst()
{
    filvec();
    long long ret=seg[1];
    long long sum=1,sum2=1,val=seg[1];
    for(auto i:vec){
        sum*=x[i];
        sum%=MOD;
        sum2*=x[i];
        long long u=sum2*get(1,0,n-1,i,n-1);
        if(u>val){
            sum2=1;
            ret=sum*get(1,0,n-1,i,n-1);
            val=y[i];
        }
    }
    ret%=MOD;
    return ret;
}
 
int init(int N, int X[], int Y[]){
    st.clear();
    n=N;
    for(int i=0;i<N;i++){
        x[i]=X[i];
        y[i]=Y[i];
        if(x[i]!=1){
            st.insert(-i);
        }
    }
    build(1,0,n-1);
    filvec();
 
 
 
    if(vec.empty()){
        sum=1;
        return seg[1];
    }
    else{
        int h=vec[0];
        for(int i=0;i<h;i++){
            sum*=x[i];
            sum%=MOD;
        }
 
        long long u=getansst();
        u*=sum;
        u%=MOD;
        return (int)u;
 
    }
 
}
 
int updateX(int pos, int val) {
 
    filvec();
    int sz=vec.size();
    if(x[pos]!=1){
        st.erase(-pos);
    }
    if(val!=1){
        st.insert(-pos);
    }
    if(st.size()<=L){
        filvec();
        x[pos]=val;
        sum=1;
        long long u=getansst();
        return (int)u;
    }
    else{
        int h=vec[0];
        if(pos<h){
            sum*=modinv(x[pos]);
            sum%=MOD;
            x[pos]=val;
            sum*=x[pos];
            sum%=MOD;
        }
        else{
 
            if(val!=1){
                st.erase(-pos);
            }
 
            if(x[pos]!=1){
                st.insert(-pos);
            }
 
 
 
 
            if(x[pos]!=1){
                if(val!=1){
                    x[pos]=val;
                }
                else{
                    int cnt=0;
                    int u;
                    for(auto x:st){
                        cnt++;
                        u=x;
                        if(cnt==L+1)break;
                    }
                    u*=-1;
                    st.erase(-pos);
                    sum*=modinv(x[u]);
                    sum%=MOD;
                    x[pos]=val;
                }
            }
            else{
                filvec();
                if(val!=1){
                    x[pos]=val;
                    st.insert(-pos);
                    sum*=x[vec[0]];
                    sum%=MOD;
                }
                else{
                    x[pos]=val;
                }
            }
        }
    }
 
 
 
 
 
 
 
 
 
    filvec();
 
 
    long long u=getansst();
 
    u*=sum;
 
    u%=MOD;
 
 
    return (int)u;
}
 
int updateY(int pos, int val) {
 
    update(1,0,n-1,pos,val);
 
    filvec();
 
    long long u=getansst();
 
    u*=sum;
 
    u%=MOD;
 
 
    return (int)u;
    
    
    
    
}

Compilation message

horses.cpp: In function 'void filvec()':
horses.cpp:79:14: warning: declaration of 'x' shadows a global declaration [-Wshadow]
   79 |     for(auto x:st){
      |              ^
horses.cpp:10:11: note: shadowed declaration is here
   10 | long long x[N];
      |           ^
horses.cpp: In function 'long long int getansst()':
horses.cpp:90:15: warning: declaration of 'sum' shadows a global declaration [-Wshadow]
   90 |     long long sum=1,sum2=1,val=seg[1];
      |               ^~~
horses.cpp:13:11: note: shadowed declaration is here
   13 | long long sum=1;
      |           ^~~
horses.cpp: In function 'int init(int, int*, int*)':
horses.cpp:106:14: warning: declaration of 'N' shadows a global declaration [-Wshadow]
  106 | int init(int N, int X[], int Y[]){
      |          ~~~~^
horses.cpp:7:11: note: shadowed declaration is here
    7 | const int N=1e6+100;
      |           ^
horses.cpp:123:21: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
  123 |         return seg[1];
      |                ~~~~~^
horses.cpp: In function 'int updateX(int, int)':
horses.cpp:144:20: warning: conversion from 'std::vector<int>::size_type' {aka 'long unsigned int'} to 'int' may change value [-Wconversion]
  144 |     int sz=vec.size();
      |            ~~~~~~~~^~
horses.cpp:161:30: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
  161 |             sum*=modinv(x[pos]);
      |                         ~~~~~^
horses.cpp:187:30: warning: declaration of 'x' shadows a global declaration [-Wshadow]
  187 |                     for(auto x:st){
      |                              ^
horses.cpp:10:11: note: shadowed declaration is here
   10 | long long x[N];
      |           ^
horses.cpp:194:36: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
  194 |                     sum*=modinv(x[u]);
      |                                 ~~~^
horses.cpp:144:9: warning: unused variable 'sz' [-Wunused-variable]
  144 |     int sz=vec.size();
      |         ^~
horses.cpp:192:22: warning: 'u' may be used uninitialized in this function [-Wmaybe-uninitialized]
  192 |                     u*=-1;
      |                     ~^~~~

Subtask #1
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 316 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 312 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 316 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 312 KB Output is correct
20 Correct 1 ms 212 KB Output is correct

Subtask #2
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 320 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 316 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Incorrect 0 ms 212 KB Output isn't correct
23 Halted 0 ms 0 KB -

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1592 ms 46460 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 308 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 312 KB Output is correct
19 Correct 0 ms 316 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Incorrect 1 ms 212 KB Output isn't correct
23 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 316 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 316 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 312 KB Output is correct
14 Correct 1 ms 312 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 1 ms 316 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Incorrect 0 ms 212 KB Output isn't correct
23 Halted 0 ms 0 KB -