Submission #947194

#	Time	Username	Problem	Language	Result	Execution time	Memory
947194		cpptowin	Sjeckanje (COCI21_sjeckanje)	C++17	0 / 110	16 ms	50524 KiB

Main

#include<bits/stdc++.h>
#define fo(i,d,c) for(int i=d;i<=c;i++)
#define fod(i,c,d) for(int i=c;i>=d;i--)
#define maxn 1000010
#define N 1010
#define fi first
#define se second
#define pb emplace_back
#define en cout<<"\n";
#define int long long
#define inf (int)1e18
#define pii pair<int,int>
#define vii vector<pii>
#define lb(x) x&-x
#define bit(i,j) ((i>>j)&1)
#define offbit(i,j) (i^(1<<j))
#define onbit(i,j) (i|(1<<j))
#define vi vector<int>
template <typename T1, typename T2> bool minimize(T1 &a, T2 b){if (a > b) {a = b; return true;} return false;}
template <typename T1, typename T2> bool maximize(T1 &a, T2 b){if (a < b) {a = b; return true;} return false;}
using namespace std;
const int nsqrt = 450;
const int mod = 1e9 + 7;
struct node
{
    array<int,2> a;
    int f[2][2];
    node(int x = 0)
    {
        a[0] = a[1] = x;
        f[1][1] = abs(x);
        f[0][0] = f[1][0] = f[0][1] = 0;
    }
};
node operator + (node a,node b)
{
    node ans;
    ans.a[0] = a.a[0];
    ans.a[1] = b.a[1];
    fo(l,0,1) fo(i,0,1) fo(j,0,1) fo(r,0,1)
    {
        if(i and j)
        {
            if(a.a[1] < 0 and b.a[0] < 0)
            ans.f[l][r] = max(ans.f[l][r],a.f[l][i] + b.f[j][r]);
        }
        else ans.f[l][r] = max(ans.f[l][r],a.f[l][i] + b.f[j][r]);
    }
    return ans;
}
node st[maxn];
int n,q;
int a[maxn];
int b[maxn];
void build(int id,int l,int r)
{
    if(l == r)
    {
        st[id] = node(b[l]);
        return;
    }
    int mid = (l + r) >> 1;
    build(id << 1,l,mid);
    build(id << 1 | 1,mid + 1,r);
    st[id] = st[id << 1] + st[id << 1 | 1];
}
void up(int id,int l,int r,int x,int val)
{
    if(l > x or r < x) return ;
    if(l == r)
    {
        st[id].a[0] += val;
        st[id].a[1] += val;
        st[id].f[1][1] = abs(st[id].a[0]);
        return ;
    }
    int mid = (l + r) >> 1;
    up(id << 1,l,mid,x,val);
    up(id << 1 | 1,mid + 1,r,x,val);
    st[id] = st[id << 1] + st[id << 1 | 1];
//    cout << l << ' ' << r << st[id].f[1][1];en;
}
void up(int x,int val)
{
    up(1,1,n - 1,x,val);
}
main()
{
    #define name "TASK"
    if(fopen(name".inp","r"))
    {
       freopen(name".inp","r",stdin);
       freopen(name".out","w",stdout);
    }
    ios_base::sync_with_stdio(false);cin.tie(NULL);
    cin >> n >> q;
    fo(i,1,n)
    {
        cin >> a[i];
        b[i - 1] = a[i - 1] - a[i];
    }
    build(1,1,n - 1);
    while(q--)
    {
        int l,r,val;
        cin >> l >> r >> val;
        if(l > 1) up(1,1,n - 1,l - 1,-val);
        if(r < n) up(1,1,n - 1,r,val);
        cout << max({st[1].f[0][0],st[1].f[1][1],st[1].f[0][1],st[1].f[1][0]});en;
    }
}

Compilation message (stderr)

Main.cpp:87:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   87 | main()
      | ^~~~
Main.cpp: In function 'int main()':
Main.cpp:92:15: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   92 |        freopen(name".inp","r",stdin);
      |        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
Main.cpp:93:15: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   93 |        freopen(name".out","w",stdout);
      |        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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