| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 1107717 |
2024-11-02T03:48:48 Z |
Aviansh |
Horses (IOI15_horses) |
C++17 |
|
90 ms |
24672 KB |
#include "horses.h"
#include <bits/stdc++.h>
using namespace std;
int n;
int *x;
int *y;
int mod = 1e9+7;
template <class T> class segTree{
private:
int n;
T *st;
public:
void realMakeST(int *arr, int l, int r, int ind){
if(l==r){
st[ind]=arr[l];
}
else{
int mid = (l+r)/2;
realMakeST(arr,l,mid,ind*2+1);
realMakeST(arr,mid+1,r,ind*2+2);
st[ind]=st[ind*2+1]*st[ind*2+2];
st[ind]%=mod;
}
}
segTree(){
//aise hi
}
segTree(int *arr, int siz){
int x = (int)pow(2,ceil(log2(siz)));
n=siz-1;
x*=2;
st=new T[x];
realMakeST(arr,0,n,0);
}
void realUpdate(int l, int r, int ind, int pos, int val){
if(pos<l||pos>r){
return;
}
if(l==r){
st[ind]=val;
return;
}
int mid = (l+r)/2;
realUpdate(l,mid,2*ind+1,pos,val);
realUpdate(mid+1,r,2*ind+2,pos,val);
st[ind]=st[ind*2+1]*st[ind*2+2];
st[ind]%=mod;
}
void update(int ind, int val){
realUpdate(0,n,0,ind,val);
}
T realQuery(int l, int r, int s, int e, int ind){
if(e<l||s>r){
return 1;
}
if(s<=l&&r<=e){
return st[ind];
}
int mid = (l+r)/2;
return (realQuery(l,mid,s,e,2*ind+1)*realQuery(mid+1,r,s,e,2*ind+2))%mod;
}
T query(int s,int e){
return realQuery(0,n,s,e,0);
}
};
template <class T> class segTreeMax{
private:
int n;
T *st;
public:
void realMakeST(int *arr, int l, int r, int ind){
if(l==r){
st[ind]=arr[l];
}
else{
int mid = (l+r)/2;
realMakeST(arr,l,mid,ind*2+1);
realMakeST(arr,mid+1,r,ind*2+2);
st[ind]=st[ind*2+1]*st[ind*2+2];
st[ind]%=mod;
}
}
segTreeMax(){
//aise hi
}
segTreeMax(int *arr, int siz){
int x = (int)pow(2,ceil(log2(siz)));
n=siz-1;
x*=2;
st=new T[x];
realMakeST(arr,0,n,0);
}
void realUpdate(int l, int r, int ind, int pos, int val){
if(pos<l||pos>r){
return;
}
if(l==r){
st[ind]=val;
return;
}
int mid = (l+r)/2;
realUpdate(l,mid,2*ind+1,pos,val);
realUpdate(mid+1,r,2*ind+2,pos,val);
st[ind]=st[ind*2+1]*st[ind*2+2];
st[ind]%=mod;
}
void update(int ind, int val){
realUpdate(0,n,0,ind,val);
}
T realQuery(int l, int r, int s, int e, int ind){
if(e<l||s>r){
return 1;
}
if(s<=l&&r<=e){
return st[ind];
}
int mid = (l+r)/2;
return (realQuery(l,mid,s,e,2*ind+1)*realQuery(mid+1,r,s,e,2*ind+2))%mod;
}
T query(int s,int e){
return realQuery(0,n,s,e,0);
}
};
int t = 1;
int *temp = &t;
segTree<long long> st(temp,1);
segTreeMax<long long> stmax(temp,1);
set<pair<int,int>>ones;
int finans(){
int mx = n-1;
long long curr = 1;
int mxy = y[n-1];
set<pair<int,int>>::iterator it = ones.end();
it--;
for(int i = n-1;i>=0;i--){
if(i==(*it).second){
i=(*it).first;
int cury = stmax.query((*it).first,(*it).second);
if(cury>curr){
mx=i;
curr=cury;
mxy=cury;
}
continue;
}
if(y[i]>curr){
mx=i;
curr=y[i];
mxy=y[i];
}
curr*=x[i];
if(curr>1e9){
break;
}
}
return (st.query(0,mx)*mxy)%mod;
}
int init(int N, int X[], int Y[]) {
x=X;
y=Y;
n=N;
st = segTree<long long>(x,n);
stmax = segTreeMax<long long>(y,n);
pair<int,int>rg={-1,-1};
for(int i = 0;i<n;i++){
if(x[i]==1){
if(rg.first==-1){
rg.first=i;
rg.second=i;
}
else{
rg.second=i;
}
}
else{
ones.insert(rg);
rg={-1,-1};
}
}
return finans();
}
int updateX(int pos, int val) {
x[pos]=val;
st.update(pos,val);
return finans();
}
int updateY(int pos, int val) {
if(y[pos]==1&&val!=1){
pair<int,int>p = *(--ones.upper_bound({pos,-1}));
if(p.second<pos){
ones.insert({pos,pos});
}
else{
ones.erase(p);
if(p.first!=pos){
ones.insert({p.first,pos-1});
}
if(p.second!=pos){
ones.insert({pos+1,p.second});
}
}
}
else if(y[pos]!=1&&val==1){
pair<int,int>p = *(--ones.upper_bound({pos,-1}));
if(p.second==pos-1){
ones.erase(p);
ones.insert({p.first,pos});
}
else{
ones.insert({pos,pos});
}
p=*(ones.upper_bound({pos,-1}));
if(p.first==pos+1){
ones.erase(p);
pair<int,int>p2=*(--ones.upper_bound({pos,-1}));
ones.erase(p2);
ones.insert({p2.first,p.second});
}
}
y[pos]=val;
stmax.update(pos,val);
return finans();
}
Compilation message
horses.cpp: In constructor 'segTree<T>::segTree(int*, int)':
horses.cpp:31:17: warning: declaration of 'x' shadows a global declaration [-Wshadow]
31 | int x = (int)pow(2,ceil(log2(siz)));
| ^
horses.cpp:6:6: note: shadowed declaration is here
6 | int *x;
| ^
horses.cpp: In constructor 'segTreeMax<T>::segTreeMax(int*, int)':
horses.cpp:93:17: warning: declaration of 'x' shadows a global declaration [-Wshadow]
93 | int x = (int)pow(2,ceil(log2(siz)));
| ^
horses.cpp:6:6: note: shadowed declaration is here
6 | int *x;
| ^
horses.cpp: In function 'int finans()':
horses.cpp:149:35: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
149 | int cury = stmax.query((*it).first,(*it).second);
| ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
horses.cpp:163:12: warning: conversion from 'long long int' to 'double' may change value [-Wconversion]
163 | if(curr>1e9){
| ^~~~
horses.cpp:167:32: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
167 | return (st.query(0,mx)*mxy)%mod;
| ~~~~~~~~~~~~~~~~~~~~^~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
336 KB |
Output is correct |
| 2 |
Correct |
1 ms |
336 KB |
Output is correct |
| 3 |
Correct |
1 ms |
508 KB |
Output is correct |
| 4 |
Correct |
1 ms |
336 KB |
Output is correct |
| 5 |
Runtime error |
1 ms |
336 KB |
Execution killed with signal 11 |
| 6 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
504 KB |
Output is correct |
| 2 |
Correct |
1 ms |
336 KB |
Output is correct |
| 3 |
Correct |
1 ms |
336 KB |
Output is correct |
| 4 |
Correct |
1 ms |
336 KB |
Output is correct |
| 5 |
Runtime error |
1 ms |
336 KB |
Execution killed with signal 11 |
| 6 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
90 ms |
24672 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
336 KB |
Output is correct |
| 2 |
Correct |
1 ms |
336 KB |
Output is correct |
| 3 |
Correct |
1 ms |
504 KB |
Output is correct |
| 4 |
Correct |
1 ms |
336 KB |
Output is correct |
| 5 |
Runtime error |
1 ms |
336 KB |
Execution killed with signal 11 |
| 6 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
336 KB |
Output is correct |
| 2 |
Correct |
1 ms |
336 KB |
Output is correct |
| 3 |
Correct |
1 ms |
592 KB |
Output is correct |
| 4 |
Correct |
1 ms |
336 KB |
Output is correct |
| 5 |
Runtime error |
2 ms |
336 KB |
Execution killed with signal 11 |
| 6 |
Halted |
0 ms |
0 KB |
- |
