Submission #1274670

#	Time	Username	Problem	Language	Result	Execution time	Memory
1274670		baotoan655	Sterilizing Spray (JOI15_sterilizing)	C++20	100 / 100	132 ms	7096 KiB

sterilizing

#include <bits/stdc++.h>
#define file(name)  if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
using namespace std;

const int N = 1e5 + 5;
int n, K, q;
struct node {
    long long sum;
    int mx;
    node() {
        sum = 0;
        mx = 0;
    }
    node operator + (const node& o) const {
        node res;
        res.sum = sum + o.sum;
        res.mx = max(mx, o.mx);
        return res;
    }
} it[N << 2];
void update(int k, int l, int r, int pos, int val) {
//    cerr << l << ' ' << r << ' ' << pos << '\n';
    if(l == r) {
        it[k].sum = val;
        it[k].mx = val;
        return;
    }
    int mid = l + r >> 1;
    if(pos <= mid) update(k << 1, l, mid, pos, val);
    else update(k << 1 | 1, mid + 1, r, pos, val);
    it[k] = it[k << 1] + it[k << 1 | 1];
}
void ope(int k, int l, int r, int u, int v) {
    if(l > v || r < u) return;
    if(l == r) {
        it[k].sum /= K;
        it[k].mx = it[k].sum;
        return;
    }
    int mid = l + r >> 1;
    if(it[k << 1].mx > 0) ope(k << 1, l, mid, u, v);
    if(it[k << 1 | 1].mx > 0) ope(k << 1 | 1, mid + 1, r, u, v);
    it[k] = it[k << 1] + it[k << 1 | 1];
}
long long get(int k, int l, int r, int u, int v) {
    if(l > v || r < u) return 0;
    if(u <= l && r <= v) return it[k].sum;
    int mid = l + r >> 1;
    return get(k << 1, l, mid, u, v) + get(k << 1 | 1, mid + 1, r, u, v);
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0), cout.tie(0);

    file("A") else file("task");
    cin >> n >> q >> K;
//    update(1, 1, n, 1, 1);
    for(int i = 1; i <= n; ++i) {
        int x;
        cin >> x;
        update(1, 1, n, i, x);
    }
    for(int _ = 1; _ <= q; ++_) {
        int t, l, r;
        cin >> t >> l >> r;
        if(t == 1) {
            update(1, 1, n, l, r);
        } else if(t == 2) {
            if(K > 1) ope(1, 1, n, l, r);
        } else cout << get(1, 1, n, l, r) << '\n';
    }
    return 0;
}

Compilation message (stderr)

sterilizing.cpp: In function 'int main()':
sterilizing.cpp:2:58: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    2 | #define file(name)  if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
      |                                                   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
sterilizing.cpp:56:5: note: in expansion of macro 'file'
   56 |     file("A") else file("task");
      |     ^~~~
sterilizing.cpp:2:91: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    2 | #define file(name)  if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
      |                                                                                    ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
sterilizing.cpp:56:5: note: in expansion of macro 'file'
   56 |     file("A") else file("task");
      |     ^~~~
sterilizing.cpp:2:58: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    2 | #define file(name)  if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
      |                                                   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
sterilizing.cpp:56:20: note: in expansion of macro 'file'
   56 |     file("A") else file("task");
      |                    ^~~~
sterilizing.cpp:2:91: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    2 | #define file(name)  if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
      |                                                                                    ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
sterilizing.cpp:56:20: note: in expansion of macro 'file'
   56 |     file("A") else file("task");
      |                    ^~~~

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