Submission #1163849

#	Time	Username	Problem	Language	Result	Execution time	Memory
1163849		nhphuc	Sterilizing Spray (JOI15_sterilizing)	C++20	80 / 100	5092 ms	4340 KiB

sterilizing

#include <bits/stdc++.h>
using namespace std;

const int N = 100100;

int n, q, k, a[N], tmax[N * 4];
long long t[N * 4]; 

void build (int id, int l, int r){
    if (l == r){
        t[id] = tmax[id] = a[l];
        return;
    }
    int m = l + r >> 1;
    build(id * 2, l, m);
    build(id * 2 + 1, m + 1, r);
    t[id] = (t[id * 2] + t[id * 2 + 1]);
    tmax[id] = max(t[id * 2], t[id * 2 + 1]);
    return;
}

void upd (int id, int l, int r, int u, int v){
    if (l > v || r < u || tmax[id] == 0){
        return;
    }
    if (l == r){
        t[id] /= k;
        tmax[id] /= k;
        return;
    }
    int m = l + r >> 1;
    upd(id * 2, l, m, u, v);
    upd(id * 2 + 1, m + 1, r, u, v);
    t[id] = (t[id * 2] + t[id * 2 + 1]);
    tmax[id] = max(tmax[id * 2], tmax[id * 2 + 1]);
    return;
}

void assign (int id, int l, int r, int i, int x){
    if (l == r){
        t[id] = tmax[id] = x;
        return;
    }
    int m = l + r >> 1;
    if (i <= m){
        assign(id * 2, l, m, i, x);
    } else {
        assign(id * 2 + 1, m + 1, r, i, x);
    }
    t[id] = (t[id * 2] + t[id * 2 + 1]);
    tmax[id] = max(tmax[id * 2], tmax[id * 2 + 1]);
    return;
}

long long get (int id, int l, int r, int u, int v){
    if (l > v || r < u){
        return 0ll;
    }
    if (l >= u && r <= v){
        return t[id];
    }
    int m = l + r >> 1;
    return (get(id * 2, l, m, u, v) + get(id * 2 + 1, m + 1, r, u, v));
}

int32_t main (){
    ios::sync_with_stdio(false); cin.tie(nullptr);
    if (fopen ("test.inp", "r")){
        freopen ("test.inp", "r", stdin);
        freopen ("test.out", "w", stdout);
    }
    cin >> n >> q >> k;
    for (int i = 1; i <= n; ++i){
        cin >> a[i];
    }
    build(1, 1, n);
    for (int i = 1; i <= q; ++i){
        int tp, x, y; cin >> tp >> x >> y;
        if (tp == 1){
            assign(1, 1, n, x, y);
        } else
        if (tp == 2){
            upd(1, 1, n, x, y);
        } else 
        if (tp == 3){
            cout << get(1, 1, n, x, y) << "\n";
        }
    }
}

Compilation message (stderr)

sterilizing.cpp: In function 'int32_t main()':
sterilizing.cpp:69:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   69 |         freopen ("test.inp", "r", stdin);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
sterilizing.cpp:70:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   70 |         freopen ("test.out", "w", stdout);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 75 / 75