Submission #1202441

#	Time	Username	Problem	Language	Result	Execution time	Memory
1202441		nguyn	Sterilizing Spray (JOI15_sterilizing)	C++20	100 / 100	138 ms	5704 KiB

sterilizing

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

#define int long long
#define ll long long 
#define F first
#define S second
#define pb push_back 
#define pii pair<int,int>

const int N = 2e5 + 5;

int n, q;
int k, c[N];
int st[4 * N]; 
int st_mx[4 * N]; 

void build(int id, int l, int r) {
    if (l == r) {
        st[id] = st_mx[id] = c[l];
        return;
    }
    int mid = (l + r) / 2;
    build(id * 2, l, mid);
    build(id * 2 + 1, mid + 1, r); 
    st[id] = st[id * 2] + st[id * 2 + 1]; 
    st_mx[id] = max(st_mx[id * 2], st_mx[id * 2 + 1]);
}

void update1(int id, int l, int r, int i, int x) {
    if (l == r) {
        st[id] = st_mx[id] = x;
        return;
    }
    int mid = (l + r) / 2;
    if (mid < i) update1(id * 2 + 1, mid + 1, r, i, x);
    else update1(id * 2, l, mid, i, x);
    st[id] = st[id * 2] + st[id * 2 + 1]; 
    st_mx[id] = max(st_mx[id * 2], st_mx[id * 2 + 1]);
}

void update2(int id, int l, int r, int u, int v) {
    if (v < l || u > r || st_mx[id] == 0) {
        return;
    }
    if (l == r) {
        st[id] /= k;
        st_mx[id] /= k;
        return;
    }
    int mid = (l + r) / 2;
    update2(id * 2, l, mid, u, v);
    update2(id * 2 + 1, mid + 1, r, u, v); 
    st[id] = st[id * 2] + st[id * 2 + 1]; 
    st_mx[id] = max(st_mx[id * 2], st_mx[id * 2 + 1]);
}

int get(int id, int l, int r, int u, int v) {
    if (u <= l && r <= v) {
        return st[id];
    }
    int mid = (l + r) / 2;
    if (u > mid) return get(id * 2 + 1, mid + 1, r, u, v); 
    if (v <= mid) return get(id * 2, l, mid, u, v);
    return get(id * 2, l, mid, u, v) + get(id * 2 + 1, mid + 1, r, u, v); 
}

signed main(){
    ios_base::sync_with_stdio(false) ; 
    cin.tie(0) ; cout.tie(0) ; 
    if (fopen("INP.INP" ,"r")) {
        freopen("INP.INP" ,"r" , stdin) ;
        freopen("OUT.OUT" , "w" , stdout) ;
    }
    cin >> n >> q >> k;
    for (int i = 1; i <= n; i++) {
    	cin >> c[i]; 
    } 
    build(1, 1, n);
    for (int i = 1; i <= q; i++) {
        int type, x, y; 
        cin >> type >> x >> y;
        if (type == 1) {
            update1(1, 1, n, x, y); 
        }
        if (type == 2) {
            if (k != 1) update2(1, 1, n, x, y); 
        }
        if (type == 3) {
            cout << get(1, 1, n, x, y) << '\n';
        }
    }
}

Compilation message (stderr)

sterilizing.cpp: In function 'int main()':
sterilizing.cpp:72:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   72 |         freopen("INP.INP" ,"r" , stdin) ;
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
sterilizing.cpp:73:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   73 |         freopen("OUT.OUT" , "w" , stdout) ;
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

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