Submission #401766

#	Time	Username	Problem	Language	Result	Execution time	Memory
401766		NintsiChkhaidze	Sjeckanje (COCI21_sjeckanje)	C++14	0 / 110	1 ms	332 KiB

Main

#include <bits/stdc++.h>
#define pb push_back
#define s second
#define f first
#define ll long long
#define int ll
using namespace std;
const int N = 3005;
ll a[N],dp[4][4][N];
pair <int,int> d[4][4][N];
main (){
    ios_base::sync_with_stdio(0),cin.tie(NULL),cout.tie(NULL);
    int n,m;
    cin>>n>>m;
    
    for (int i=1;i<=n;i++)
        cin>>a[i];
        
    while(m--){
        int l,r,k;
        cin>>l>>r>>k;
        
        for (int i=l;i<=r;i++) a[i] += k;
        
        for (int i=1;i<=n;i++){
            d[0][0][i] = d[0][1][i] = d[1][0][i] = d[1][1][i] = {1e18,-1e18};
            dp[0][1][i] = dp[1][1][i] = dp[0][0][i] = dp[1][0][i] = 0;
        }
        
        d[1][1][1] = {a[1],a[1]};
        d[1][0][1] = {a[1],a[1]};
        
        for (int i=2;i<=n;i++){
            //0 1
            int x = dp[0][0][i-1] + max(d[0][0][i-1].s,a[i]) - min(d[0][0][i-1].f,a[i]);
            int y = dp[1][0][i-1] + max(d[1][0][i-1].s,a[i]) - min(d[1][0][i-1].f,a[i]);
            
            if (x > y) dp[0][1][i] = x,d[0][1][i] = {min(d[0][0][i-1].f,a[i]),max(d[0][0][i-1].s,a[i])};
            else dp[0][1][i] = y,d[0][1][i] = {min(d[1][0][i-1].f,a[i]),max(d[1][0][i-1].s,a[i])};
            
            //1 1
            dp[1][1][i] = max(dp[0][1][i-1],dp[1][1][i-1]);
            
            //1 0
            dp[1][0][i] = max(dp[1][1][i-1],dp[0][1][i-1]);
            d[1][0][i] = {a[i],a[i]};
            
            //0 0 
            x = dp[1][0][i-1]; y = dp[0][0][i-1];
            dp[0][0][i] = max(x,y);
            
            if (x>y) d[0][0][i] = {min(d[1][0][i-1].f,a[i]),max(d[1][0][i-1].s,a[i])};
            else d[0][0][i] = {min(d[0][0][i-1].f,a[i]),max(d[0][0][i-1].s,a[i])};
        }
        cout<<max(dp[1][1][n],dp[0][1][n])<<"\n";
    }
}

Compilation message (stderr)

Main.cpp:11:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   11 | main (){
      | ^~~~

• Subtask 1: 0 / 15
• Subtask 2: 0 / 40
• Subtask 3: 0 / 55