oj.uz

Submission #1113317

# Submission time Handle Problem Language Result Execution time Memory
1113317 2024-11-16T11:14:57 Z kiethm07 Sjeckanje (COCI21_sjeckanje) C++11
0 / 110
 1 ms 476 KB 
#include <bits/stdc++.h>

#define pii pair<int,int>
#define pli pair<long long,pii>
#define fi first
#define se second

#define vi vector<int>
#define vii vector<pii>
#define all(x) x.begin(),x.end()

using namespace std;

typedef long long ll;
typedef long double ld;

const int inf = 1e9;
const ll linf = 1e16;
const double pi = acos(-1);
const int N = 2e5 + 5;

ll a[N];
ll d[N];
ll dp[N][2];
int n,q;

ll brute(){
    dp[0][0] = dp[0][1] = 0;
    dp[1][0] = dp[1][1] = 0;
    if (d[1] > 0) dp[1][0] = d[1];
    else dp[1][1] = -d[1];
//    for (int i = 1; i < n; i++) cout << d[i] << " "; cout << "\n";
    for (int i = 2; i < n; i++){
        dp[i][0] = dp[i - 1][0];
        dp[i][1] = dp[i - 1][1];
        if (d[i] > 0){
            dp[i][0] = max(dp[i][0], dp[i - 1][0] + d[i]);
            dp[i][0] = max(dp[i][0], max(dp[i - 2][0], dp[i - 2][1]) + d[i]);
        }
        else{
            dp[i][1] = max(dp[i][1], dp[i - 1][1] - d[i]);
            dp[i][1] = max(dp[i][0], max(dp[i - 2][0], dp[i - 2][1]) - d[i]);
        }
    }
    return max(dp[n - 1][0], dp[n - 1][1]);
}

void solve(){
    while(q--){
        int l,r,x;
        cin >> l >> r >> x;
        d[l - 1] += x;
        d[r] -= x;
        cout << brute() << "\n";
    }
}

int main(){
    #define TEXT "a"
    cin.tie(0) -> sync_with_stdio(0);
    if (fopen(TEXT".inp","r")){
        freopen(TEXT".inp","r",stdin);
        freopen(TEXT".out","w",stdout);
    }
    cin >> n >> q;
    for (int i = 1; i <= n; i++){
        cin >> a[i];
    }
    for (int i = 1; i < n; i++) d[i] = a[i + 1] - a[i];
    solve();
    return 0;
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:62:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   62 |         freopen(TEXT".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
Main.cpp:63:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   63 |         freopen(TEXT".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 476 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 40.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 476 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 55.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 476 KB Output isn't correct
2 Halted 0 ms 0 KB -