Submission #861037

#	Time	Username	Problem	Language	Result	Execution time	Memory
861037		guagua0407	Two Dishes (JOI19_dishes)	C++17	10 / 100	505 ms	1048576 KiB

dishes

//#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int,int>
#define f first
#define s second
#define all(x) x.begin(),x.end()
#define _ ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}

const int mxn=1e6+5;
ll a[mxn],S[mxn],Q[mxn];
ll b[mxn],T[mxn],P[mxn];
int pa[mxn],pb[mxn];
vector<int> qa[mxn],qb[mxn];
int n,m;

int main() {_
    cin>>n>>m;
    for(int i=1;i<=n;i++){
        cin>>a[i]>>S[i]>>P[i];
        a[i]+=a[i-1];
    }
    for(int i=1;i<=m;i++){
        cin>>b[i]>>T[i]>>Q[i];
        b[i]+=b[i-1];
    }
    for(int i=1;i<=n;i++){
        int pos=upper_bound(b,b+m+1,S[i]-a[i])-b-1;
        pa[i]=pos;
        if(pos>=0) qa[pos].push_back(i);
    }
    for(int i=1;i<=m;i++){
        int pos=upper_bound(a,a+n+1,T[i]-b[i])-a-1;
        pb[i]=pos;
        if(pos>=0) qb[pos].push_back(i);
    }
    vector<vector<ll>> dp(n+1,vector<ll>(m+1,-1e18));
    dp[0][0]=0;
    for(int i=0;i<=n;i++){
        for(int j=0;j<=m;j++){
            if(i>0) dp[i][j]=max(dp[i][j],dp[i-1][j]+(pa[i]>=j?P[i]:0));
            if(j>0) dp[i][j]=max(dp[i][j],dp[i][j-1]+(pb[j]>=i?Q[j]:0));
        }
    }
    cout<<dp[n][m];
    return 0;
}
//maybe its multiset not set

Compilation message (stderr)

dishes.cpp: In function 'void setIO(std::string)':
dishes.cpp:12:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
dishes.cpp:13:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 3 / 3
• Subtask 3: 7 / 7
• Subtask 4: 0 / 39
• Subtask 5: 0 / 11
• Subtask 6: 0 / 9
• Subtask 7: 0 / 17
• Subtask 8: 0 / 9