Submission #694941

#	Time	Username	Problem	Language	Result	Execution time	Memory
694941		Do_you_copy	Sterilizing Spray (JOI15_sterilizing)	C++17	100 / 100	183 ms	10224 KiB

sterilizing

#include <bits/stdc++.h>
#define fi first
#define se second
#define faster ios_base::sync_with_stdio(0); cin.tie(0);
#define pb push_back
#define int long long
using namespace std;
using ll = long long;
using pii = pair <int, int>;
mt19937_64 Rand(chrono::steady_clock::now().time_since_epoch().count());
const int maxN = 1e5 +1;
const int inf = 0x3f3f3f3f;
//const int Mod =
int n, q, k;
ll bit[maxN];
map <int, int> mp;

void update(int x, int v){
    for (; x <= n; x += x & -x){
        bit[x] += v;
    }
}

int get(int x){
    int res = 0;
    for (; x; x -= x & -x){
        res += bit[x];
    }
    return res;
}


void Init(){
    cin >> n >> q >> k;
    for (int i = 1; i <= n; ++i){
        cin >> mp[i];
        update(i, mp[i]);
    }
    mp[n + 1] = 0;
    while (q--){
        int s, t, u;
        cin >> s >> t >> u;
        if (s == 1){
            update(t, u - mp[t]);
            mp[t] = u;
        }
        if (s == 2 && k != 1){
            for (auto it = mp.lower_bound(t); it->fi <= u;){
                auto it1 = it++;
                int x = it1->se;
                it1->se /= k;
                update(it1->fi, it1->se - x);
                if (it1->se == 0){
                    mp.erase(it1);
                }
            }
        }
        if (s == 3){
            cout << get(u) - get(t - 1) << "\n";
        }
    }
}

#define taskname "test"
signed main(){
    faster
    if (fopen(taskname ".inp", "r")){
        freopen(taskname ".inp", "r", stdin);
        freopen(taskname ".out", "w", stdout);
    }
    int tt = 1;
    //cin >> tt;
    while (tt--){
        Init();
    }
}

Compilation message (stderr)

sterilizing.cpp: In function 'int main()':
sterilizing.cpp:68:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   68 |         freopen(taskname ".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
sterilizing.cpp:69:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   69 |         freopen(taskname ".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 75 / 75