Submission #776351

#	Time	Username	Problem	Language	Result	Execution time	Memory
776351		LeVanThuc	Art Exhibition (JOI18_art)	C++17	0 / 100	2 ms	340 KiB

art

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define fi first
#define se second
#define p(x,y) pair<ll,ll>(x,y)
#define BIT(i,x) ((x>>i)&1)
#define MASK(x) (1<<x)
#define ld long double
#define __builtin_popcount __builtin_popcountll
#define pll pair<ll,ll>
template<class T1,class T2>
bool maximize(T1 &x,const T2 &y)
{
    if(x<y)
    {
        x=y;
        return 1;
    }
    return 0;
}
template<class T1,class T2>
bool minimize(T1 &x,const T2 &y)
{
    if(x>y)
    {
        x=y;
        return 1;
    }
    return 0;
}
void online()
{
    std::ios_base::sync_with_stdio(0);
    cin.tie(0);
#ifndef ONLINE_JUDGE
    freopen("input.inp", "r", stdin);
    freopen("output.out","w", stdout);
#else
#endif
}
const int M=998244353,N=5e5+10;
int in[31][N],dp[N],f[31][N],n,k,m;
int solve(int b)
{
    dp[0]=1;
    for(int i=1;i<=n+1;i++)
    {
        maximize(f[b][i],f[b][i-1]);
        in[b][i]+=in[b][i-1];
        if(in[b][i])
        {
            dp[i]=0;
        }
        else
        {
            dp[i]=dp[i-1];
            if(f[b][i])
            dp[i]-=dp[f[b][i]-1];
            if(dp[i]<0) dp[i]+=M;
        }
        dp[i]=dp[i]+dp[i-1];
        if(dp[i]>=M) dp[i]-=M;
    }
    return (dp[n+1]-dp[n]+M)%M;
}
int main()
{
    online();
    cin>>n>>k>>m;
    for(int i=1;i<=m;i++)
    {
        int l,r,x;
        cin>>l>>r>>x;
        for(int b=0;b<k;b++)
        {
            if(BIT(b,x))
            {
                in[b][l]++;
                in[b][r+1]--;
            }
            else maximize(f[b][r+1],l);
        }
    }
    int ans=1;
    for(int i=0;i<k;i++) ans=1ll*ans*solve(i)%M;
    cout<<ans;
}

Compilation message (stderr)

art.cpp: In function 'void online()':
art.cpp:37:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |     freopen("input.inp", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
art.cpp:38:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |     freopen("output.out","w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 50