제출 #1168973

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1168973		sasde	Bitwise (BOI06_bitwise)	C++20	100 / 100	0 ms	328 KiB

bitwise

#include<bits/stdc++.h>
#define int long long
#define task "strdel"
#define ii pair<int,int>
#define iii pair<int,ii>
#define iv pair<ii,ii>
#define se second
#define fi first
#define ffi fi.fi
#define sfi se.fi
#define sse se.se
#define fse fi.se
#define lt(i, c, d) for(int i = c; i <= d; ++i)
#define fl(i, c, d) for(int i = d; i >= c; --i)
#define pb push_back
#define emb emplace_back
#define emf emplace_front
#define em emplace
using namespace std;
const int N=1e2+5,lg=30,mod=1e9+7;
mt19937 rd(chrono::steady_clock::now().time_since_epoch().count());
int Rand(int u,int v){
 return u+rd()%(v-u+1);
}
int n,k,s[N],p[N];
ii a[N];
bool check[N];
void solve(){
  cin >> n  >> k;
  s[1]=1;
  for(int i=1;i<=k;++i){
    cin >> p[i];
    s[i+1]=s[i]+p[i];
  }
  for(int i=1;i<=n;++i){
    cin >> a[i].fi >> a[i].se;
  }
  int mask=0;
  for(int j=30;j>=0;--j){
    bool ok=true;
    int set=1<<j;
    for(int i=1;i<=k;++i){
        if(check[i])continue;
        bool kk=0;
      for(int z=s[i];z<s[i+1];++z){
         if(set<=a[z].se)kk=1;
      }
      ok&=kk;
    }
    for(int i=1;i<=k;++i){
       int q=0,q1=0;
       for(int z=s[i];z<s[i+1];++z){
        q+=a[z].se>=set;
        q1+=a[z].se>=set&&set>a[z].fi;
       }
       if(q1&&(!ok||q>1))check[i]=true;
       for(int z=s[i];z<s[i+1];++z){
        if(a[z].se<set)continue;
        a[z].fi-=set;
        a[z].se-=set;
      }
    }
    if(ok)mask^=(1<<j);
  }


  cout << mask;
}
main()
{
  srand(time(0));
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    if(fopen(task".inp","r")){
      freopen(task".inp","r",stdin);
      freopen(task".out","w",stdout);
    }
    int t=1;
 //   cin >> t;
while(t--){
    solve();
    cout<<'\n';
}

}

컴파일 시 표준 에러 (stderr) 메시지

bitwise.cpp:69:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   69 | main()
      | ^~~~
bitwise.cpp: In function 'int main()':
bitwise.cpp:76:14: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   76 |       freopen(task".inp","r",stdin);
      |       ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
bitwise.cpp:77:14: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   77 |       freopen(task".out","w",stdout);
      |       ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 100 / 100