Submission #434700

#TimeUsernameProblemLanguageResultExecution timeMemory
434700cpp219Sterilizing Spray (JOI15_sterilizing)C++14
10 / 100
5049 ms2784 KiB
#pragma GCC optimization "O2"
#pragma GCC optimization "unroll-loop"
#pragma GCC target ("avx2")

#include <bits/stdc++.h>
#define ll int
#define ld long double
#define fs first
#define sc second
using namespace std;
const ll N = 1e5 + 9;
const ll mod = 1e9 + 7;
const ll Log2 = 20;
typedef pair<ll,ll> LL;

ll n,Q,k,x;

ll st[4*N];

void upd(ll id,ll l,ll r,ll u,ll val){
    if (u < l||r < u) return;
    if (l == r){
        st[id] = val; return;
    }
    ll mid = (l + r)/2;
    upd(id*2,l,mid,u,val); upd(id*2 + 1,mid + 1,r,u,val);
    st[id] = st[id*2] + st[id*2 + 1];
}

ll Get(ll id,ll l,ll r,ll u,ll v){
    if (v < l||r < u) return 0;
    if (u <= l&&r <= v) return st[id];
    ll mid = (l + r)/2;
    return Get(id*2,l,mid,u,v) + Get(id*2 + 1,mid + 1,r,u,v);
}

ll Walk(ll id,ll l,ll r,ll val){
    ///first value which > val
    if (l == r){
        if (st[id] > val) return l;
        return n + 1;
    }
    ll mid = (l + r)/2;
    if (st[id*2] > val) return Walk(id*2,l,mid,val);
    return Walk(id*2 + 1,mid + 1,r,val - st[id*2]);
}

ll type,l,r;

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0), cout.tie(0);
    #define task "tst"
    if (fopen(task".inp", "r")){
        freopen(task".inp", "r", stdin);
        //freopen(task".out", "w", stdout);
    }
    cin>>n>>Q>>k;
    for (ll i = 1;i <= n;i++) cin>>x,upd(1,1,n,i,x);
    while(Q--){
        cin>>type>>l>>r;
        if (type == 1) upd(1,1,n,l,r);
        else if (type == 2){
            if (k > 1){
                while(l <= r){
                    ll now = Get(1,1,n,l,l); now /= k;
                    upd(1,1,n,l,now); l = Walk(1,1,n,Get(1,1,n,1,l));
                }
            }
        }
        else cout<<Get(1,1,n,l,r)<<"\n";
    }
}

Compilation message (stderr)

sterilizing.cpp:1: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    1 | #pragma GCC optimization "O2"
      | 
sterilizing.cpp:2: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    2 | #pragma GCC optimization "unroll-loop"
      | 
sterilizing.cpp: In function 'int main()':
sterilizing.cpp:55:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   55 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
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