Submission #202631

#	Time	Username	Problem	Language	Result	Execution time	Memory
202631		SamAnd	Fire (JOI20_ho_t5)	C++17	6 / 100	329 ms	22512 KiB

ho_t5

#include <bits/stdc++.h>
using namespace std;
const int N = 200005;
struct ban
{
    int t, l, r;
};

int n, m;
int s[N];
ban b[N];

int ss[N];
void solv1()
{
    for (int i = 1; i <= m; ++i)
    {
        for (int j = 1; j <= n; ++j)
            ss[j] = s[j];
        for (int ii = 0; ii < b[i].t; ++ii)
        {
            for (int j = n; j >= 1; --j)
                ss[j] = max(ss[j], ss[j - 1]);
        }
        long long ans = 0;
        for (int j = b[i].l; j <= b[i].r; ++j)
            ans += ss[j];
        printf("%lld\n", ans);
    }
}

int t[N * 4];
void bil(int tl, int tr, int pos)
{
    if (tl == tr)
    {
        t[pos] = s[tl];
        return;
    }
    int m = (tl + tr) / 2;
    bil(tl, m, pos * 2);
    bil(m + 1, tr, pos * 2 + 1);
    t[pos] = max(t[pos * 2], t[pos * 2 + 1]);
}

int qry(int tl, int tr, int l, int r, int pos)
{
    if (tl == l && tr == r)
        return t[pos];
    int m = (tl + tr) / 2;
    if (r <= m)
        return qry(tl, m, l, r, pos * 2);
    if (l > m)
        return qry(m + 1, tr, l, r, pos * 2 + 1);
    return max(qry(tl, m, l, m, pos * 2),
               qry(m + 1, tr, m + 1, r, pos * 2 + 1));
}

long long p[N];
void solv2()
{
    bil(1, n, 1);
    for (int i = 1; i <= n; ++i)
        s[i] = qry(1, n, max(1, i - b[1].t), i, 1);
    for (int i = 1; i <= n; ++i)
        p[i] = p[i - 1] + s[i];
    for (int i = 1; i <= m; ++i)
        printf("%lld\n", p[b[i].r] - p[b[i].l - 1]);
}

void solv3()
{
    bil(1, n, 1);
    for (int i = 1; i <= m; ++i)
    {
        printf("%d\n", qry(1, n, max(1, b[i].l - b[i].t), b[i].l, 1));
    }
}

int t1[N * 4];

void ubd1(int tl, int tr, int x, int pos)
{
    if (tl == tr)
    {
        t1[pos] = 1;
        return;
    }
    int m = (tl + tr) / 2;
    if (x <= m)
        ubd1(tl, m, x, pos * 2);
    else
        ubd1(m + 1, tr, x, pos * 2 + 1);
    t1[pos] = t1[pos * 2] + t1[pos * 2 + 1];
}

int qry1(int tl, int tr, int l, int r, int pos)
{
    if (l > r)
        return 0;
    if (tl == l && tr == r)
        return t1[pos];
    int m = (tl + tr) / 2;
    return qry1(tl, m, l, min(m, r), pos * 2) +
        qry1(m + 1, tr, max(m + 1, l), r, pos * 2 + 1);
}

int ans[N];

int u2[N];
vector<int> v[N];
vector<int> q[N];
void solv4()
{
    for (int i = 1; i <= n; ++i)
    {
        u2[i] = u2[i - 1];
        if (s[i] == 2)
            u2[i] = i;
    }
    for (int i = 1; i <= n; ++i)
    {
        if (u2[i])
            v[i - u2[i]].push_back(i);
    }
    for (int i = 1; i <= m; ++i)
    {
        q[b[i].t].push_back(i);
    }
    for (int i = 0; i <= n; ++i)
    {
        for (int j = 0; j < v[i].size(); ++j)
        {
            int x = v[i][j];
            ubd1(1, n, x, 1);
        }
        for (int j = 0; j < q[i].size(); ++j)
        {
            int x = q[i][j];
            ans[x] = qry1(1, n, b[x].l, b[x].r, 1) + (b[x].r - b[x].l + 1);
        }
    }
    for (int i = 1; i <= m; ++i)
        printf("%d\n", ans[i]);
}

int main()
{
    //freopen("input.txt", "r", stdin);
    scanf("%d%d", &n, &m);
    for (int i = 1; i <= n; ++i)
        scanf("%d", &s[i]);
    for (int i = 1; i <= m; ++i)
    {
        scanf("%d%d%d", &b[i].t, &b[i].l, &b[i].r);
    }
    solv4();
    return 0;
}

Compilation message (stderr)

ho_t5.cpp: In function 'void solv4()':
ho_t5.cpp:132:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int j = 0; j < v[i].size(); ++j)
                         ~~^~~~~~~~~~~~~
ho_t5.cpp:137:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int j = 0; j < q[i].size(); ++j)
                         ~~^~~~~~~~~~~~~
ho_t5.cpp: In function 'int main()':
ho_t5.cpp:150:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &n, &m);
     ~~~~~^~~~~~~~~~~~~~~~
ho_t5.cpp:152:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &s[i]);
         ~~~~~^~~~~~~~~~~~~
ho_t5.cpp:155:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d%d", &b[i].t, &b[i].l, &b[i].r);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 1
• Subtask 2: 0 / 6
• Subtask 3: 0 / 7
• Subtask 4: 6 / 6
• Subtask 5: 0 / 80