Submission #39861

#	Time	Username	Problem	Language	Result	Execution time	Memory
39861		grumpy_gordon	Sterilizing Spray (JOI15_sterilizing)	C++14	100 / 100	216 ms	8744 KiB

sterilizing

/*
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#include <bits/stdc++.h>

//#pragma GCC optimize("O3")
//#pragma GCC optimize("Ofast,no-stack-protector")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx")
//#pragma GCC target("avx,tune=native")
//float __attribute__((aligned(32)))

using namespace std;

typedef long long ll;

typedef unsigned long long ull;

typedef long double ld;

int mysqrt(ll x){
    int l = 0, r = 1e9 + 1;
    while (r - l > 1){
        int m = (l + r) / 2;
        if (m * (ll)m <= x)
            l = m;
        else
            r = m;
    }
    return l;
}

mt19937 rnd(1337);

ll AR = 19, BR = 13, CR = 23, XR = 228, YR = 322, MODR = 1e9 + 993;

ll myrand(){
    ll ZR = (XR * AR + YR * BR + CR) % MODR;
    XR = YR;
    YR = ZR;
    return ZR;
}

const int Mod = 1e9 + 7;

int bpow(int x, int y){
    if (y == 0)
        return 1;
    if (y == 1)
        return x;
    int ret = bpow(x, y >> 1);
    ret = (ret * (ll)ret) % Mod;
    if (y & 1)
        ret = (ret * (ll)x) % Mod;
    return ret;
}

int bdiv(int x, int y){
    return (x * (ll)bpow(y, Mod - 2)) % Mod;
}

void setmin(int &x, int y){
    x = min(x, y);
}

void setmax(int &x, int y){
    x = max(x, y);
}

int gcd(int a, int b){
    return a ? gcd(b % a, a) : b;
}

const ll llinf = 2e18 + 100;

const int maxn = 1e5 + 100, maxw = (1 << 17) + 100, inf = 2e9 + 100, sq = 300, mod = 1e9 + 7, LG = 17;

int n, k, zap;

int a[maxn];

set<int> q;

ll fen[maxn];

void inc(int i, int v){
    for (; i < n; i = (i | (i + 1)))
        fen[i] += v;
}

ll get(int i){
    ll v = 0;
    for (; i >= 0; i = (i & (i + 1)) - 1)
        v += fen[i];
    return v;
}

int main()
{
    #ifdef ONPC
    //ifstream cin("a.in");
    //ofstream cout("a.out");
    freopen("a.in", "r", stdin);
    freopen("a.out", "w", stdout);
    #else
    //ifstream cin("sprinklers.in");
    //ofstream cout("sprinklers.out");
    //freopen("road.in", "r", stdin);
    //freopen("road.out", "w", stdout);
    #endif // ONPC
    //ios::sync_with_stdio(0);
    //cin.tie(0);
    //cout.tie(0);
    //cin >> n >> zap >> k;
    scanf("%d%d%d", &n, &zap, &k);
    for (int i = 0; i < n; i++){
        //cin >> a[i];
        scanf("%d", &a[i]);
        inc(i, a[i]);
        if (a[i])
            q.insert(i);
    }
    while (zap--){
        int t, A, B;
        scanf("%d%d%d", &t, &A, &B);
        //cin >> t >> A >> B;
        A--;
        if (t == 1){
            if (!B && a[A])
                q.erase(A);
            if (B && !a[A])
                q.insert(A);
            inc(A, B - a[A]);
            a[A] = B;
            continue;
        }
        B--;
        if (t == 3)
            printf("%lld\n", get(B) - get(A - 1));
        else{
            if (k == 1)
                continue;
            vector<int> p;
            set<int> :: iterator it = q.lower_bound(A);
            while (it != q.end() && *it <= B){
                inc(*it, a[*it] / k - a[*it]);
                a[*it] /= k;
                if (!a[*it])
                    p.push_back(*it);
                it++;
            }
            for (auto i : p)
                q.erase(i);
        }
    }
}

Compilation message (stderr)

sterilizing.cpp: In function 'int main()':
sterilizing.cpp:196:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d%d", &n, &zap, &k);
                                  ^
sterilizing.cpp:199:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &a[i]);
                           ^
sterilizing.cpp:206:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d%d", &t, &A, &B);
                                    ^

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