#include <bits/stdc++.h>
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#define vi vector<int>
#define ve vector
#define ll long long
#define vl vector<ll>
#define vll vector<pair<ll,ll>>
#define onbit __builtin_popcount
#define ii pair<int,int>
#define vvi vector<vi>
#define vii vector<ii>
#define gii greater<ii>
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define INF 1e18
#define eps 1e-7
#define eps1 1e-2
#define optimise ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
#define MAX_A 1e5+5
using namespace std;
const ll MOD = 1e9+7;
const int nax = 1e5+5;
const int MAX_VAL = 1e6+1;
double PI=3.14159265359;
int arx[8]={1,0,0,-1,-1,-1, 1, 1};
int ary[8]={0,1,-1, 0, 1,-1,-1, 1};
void setIO(string s) {
freopen((s + ".in").c_str(), "r", stdin);
freopen((s + ".out").c_str(), "w", stdout);
}
vector<ii> adj[nax];
int main(){
optimise;
/*#ifndef ONLINE_JUDGE
freopen("input.txt", "r", stdin);
freopen("output.txt", "w", stdout);
#endif*/
int n,k;
cin>>n>>k;
int tab[k];
for (int i = 0; i < k; ++i)
{
cin>>tab[i];
}
int a[n];
int b[n];
for (int i = 0; i < n; ++i)
{
cin>>a[i]>>b[i];
}
int ans=0;
for (int i = 30; i >= 0; --i)
{
int cnt=0;
bool test=true;
for (int j = 0; j < k; ++j)
{
int cur=tab[j];
//cout <<cur<<endl;
bool nabba=false;
while(cur--){
//cout <<a[cnt]<<" "<<b[cnt]<<" "<<i<<endl;
if(b[cnt]-a[cnt]>=(1<<i)){
//cout <<"hey"<<endl;
nabba=true;
}else if((a[cnt]&(1<<i))||(b[cnt]&(1<<i))) {
// cout <<"hey"<<endl;
nabba=true;
}
cnt++;
}
test&=nabba;
}
//cout <<test<<endl;
if(test){
ans+=(1<<i);
//cout <<"hey"<<" "<<(1<<i)<<endl;
}
//cout <<i<<endl;
cnt=0;
for (int j = 0; j < k; ++j)
{
int cur=tab[j];
bool nabba=false;
while(cur--){
if(nabba){
//cout <<a[cnt]<<" "<<b[cnt]<<endl;
cnt++;
continue;
}
if(a[cnt]&(1<<i)||b[cnt]&(1<<i)){
if(b[cnt]-a[cnt]<(1<<i)||test){
//cout <<a[cnt]<<" "<<b[cnt]<<endl;
nabba=true;
b[cnt]-=(1<<i);
a[cnt]-=(1<<i);
a[cnt]=max(a[cnt],0);
b[cnt]=max(b[cnt],0);
}
}
// <<a[cnt]<<" "<<b[cnt]<<endl;
cnt++;
}
}
}
cout <<ans<<endl;
}
Compilation message
bitwise.cpp: In function 'void setIO(std::string)':
bitwise.cpp:31:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
31 | freopen((s + ".in").c_str(), "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bitwise.cpp:32:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
32 | freopen((s + ".out").c_str(), "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
2648 KB |
Output is correct |
| 2 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 3 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 4 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 5 |
Incorrect |
1 ms |
2648 KB |
Output isn't correct |
| 6 |
Incorrect |
1 ms |
2652 KB |
Output isn't correct |
| 7 |
Correct |
1 ms |
2648 KB |
Output is correct |
| 8 |
Correct |
1 ms |
2648 KB |
Output is correct |
| 9 |
Incorrect |
1 ms |
2652 KB |
Output isn't correct |
| 10 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 11 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 12 |
Incorrect |
1 ms |
2652 KB |
Output isn't correct |
| 13 |
Incorrect |
1 ms |
2648 KB |
Output isn't correct |
| 14 |
Incorrect |
1 ms |
2652 KB |
Output isn't correct |
| 15 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 16 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 17 |
Incorrect |
1 ms |
2652 KB |
Output isn't correct |
| 18 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 19 |
Incorrect |
1 ms |
2652 KB |
Output isn't correct |
| 20 |
Incorrect |
1 ms |
2796 KB |
Output isn't correct |
