Submission #402135

#	Time	Username	Problem	Language	Result	Execution time	Memory
402135		NintsiChkhaidze	Sjeckanje (COCI21_sjeckanje)	C++14	55 / 110	75 ms	596 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][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;
        
        vector <int> v;
        v.clear();
        for (int i=2;i<=n;i++)
            v.pb(a[i-1] - a[i]);
        
        for (int i=0;i<v.size();i++){
            bool q=0;
            if (i && v[i]*v[i-1] < 0) q=1;
            if (i) dp[0][i] = max(dp[0][i - 1],dp[1][i-1]);
            if (!q) dp[1][i] = dp[0][i] + abs(v[i]);
            else dp[1][i] = dp[0][i - 1] + abs(v[i]);
        }
        
        cout<<max(dp[0][v.size()-1],dp[1][v.size()-1])<<"\n";
        for (int i=0;i<=n;i++)
            dp[0][i] = dp[1][i] = 0;
    }
}

Compilation message (stderr)

Main.cpp:10:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   10 | main (){
      | ^~~~
Main.cpp: In function 'int main()':
Main.cpp:30:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |         for (int i=0;i<v.size();i++){
      |                      ~^~~~~~~~~

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