Submission #1071020

#	Time	Username	Problem	Language	Result	Execution time	Memory
1071020		Boycl07	Sterilizing Spray (JOI15_sterilizing)	C++17	100 / 100	108 ms	9096 KiB

sterilizing

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

typedef long long ll;
typedef unsigned long long ull;

#define rep(i, n) for(int i = 1; (i) <= (n); ++i)
#define forn(i, l, r) for(int i = (l); i <= (r); ++i)
#define ford(i, r, l) for(int i = (r); i >= (l); --i)
#define FOR(i, n) for(int i = 0; i < (n); ++i)
#define FORD(i, n) for(int i = ((n) - 1); i >= 0; --i)
#define fi first
#define se second
#define pii pair<int, int>
#define pll pair<ll, ll>
#define pb push_back
#define endl "\n"
#define task "BAI1"
#define sz(a) int(a.size())
#define C(x, y) make_pair(x, y)
#define all(a) (a).begin(), (a).end()
#define bit(i, mask) (mask >> i & 1)

template<typename T> bool maximize(T &res, const T &val) { if (res < val){ res = val; return true; }; return false; }
template<typename T> bool minimize(T &res, const T &val) { if (res > val){ res = val; return true; }; return false; }

inline int readInt()       {char c;while(c=getchar(),c!='-'&&(c<'0'||c>'9'));bool sign=(c=='-');if(sign)c=getchar();int n=c-'0';while(c=getchar(),c>='0'&&c<='9')n=10*n+c-'0';return(!sign)?n:-n;}
inline ll readLong()       {char c;while(c=getchar(),c!='-'&&(c<'0'||c>'9'));bool sign=(c=='-');if(sign)c=getchar();ll  n=c-'0';while(c=getchar(),c>='0'&&c<='9')n=10*n+c-'0';return(!sign)?n:-n;}
inline string readString() {char c;while(c=getchar(),c==' '||c=='\n'||c=='\t');string s({c});while(c=getchar(),c!=EOF&&c!=' '&&c!='\n'&&c!='\t')s+=c;return s;}

const int N = 1e5 + 3;
const int M = 1e3;
const int LOG = 50;
const int MOD = 1e9 + 7;
const ll INF = 1e18;

int n, q, k;

ll bit[N];
int a[N];

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

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

set<int> s;

void solve()
{
    cin >> n >> q >> k;
    rep(i, n)
    {
        cin >> a[i];
        if(a[i]) s.insert(i);
        update(i, a[i]);
    }

    rep(i, q)
    {
        int type, x, y;
        cin >> type >> x >> y;
        if(type == 1)
        {
            if(s.find(x) !=  s.end()) s.erase(x);
            update(x, y - a[x]);
            a[x] = y;
            if(a[x] > 0) s.insert(x);
        } else if(type == 2)
        {
            if(k > 1)
            {
                auto u = s.lower_bound(x);
                vector<int> tmp;
                while(u != s.end() && *u <= y)
                {
                    int idx = *u;
                    int new_val = a[idx] / k;
                    update(idx, new_val - a[idx]);
                    a[idx] = new_val;
                    if(a[idx] == 0) tmp.pb(idx);
                    ++u;
                }
                for(int idx : tmp) s.erase(idx);
            }
        } else cout << get(y) - get(x - 1) << endl;

    }
}

signed main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    int TC = 1;

    if(fopen(task".inp", "r"))
    {
        freopen(task".inp", "r", stdin);
        freopen(task".out", "w", stdout);
    }

    if(fopen("note.inp", "r"))
    {
        freopen("note.inp", "r", stdin);
        freopen("note.out", "w", stdout);
    }

    while(TC--)
    {
        solve();
        cout << endl;
    }

    return 0;
}

Compilation message (stderr)

sterilizing.cpp: In function 'int main()':
sterilizing.cpp:107:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  107 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
sterilizing.cpp:108:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  108 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
sterilizing.cpp:113:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  113 |         freopen("note.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
sterilizing.cpp:114:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  114 |         freopen("note.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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