Submission #85937

#	Time	Username	Problem	Language	Result	Execution time	Memory
85937		inom	Simple game (IZhO17_game)	C++14	100 / 100	242 ms	15532 KiB

game

#include<bits/stdc++.h>

#define fi first
#define se second
#define sc scanf
#define pr printf
#define pb push_back
#define sz(c) (int)(c).size()
#define all(c) (c).begin(), (c).end()
#define rall(c) (c).rbegin(), (c).rend()
#define in freopen("game.in", "r", stdin);
#define out freopen("game.out", "w", stdout);

using namespace std;

const int N = 100100;
const int INF = 1000001;

int TN = 1;

int n, m;
int a[N], t[8 * INF];

void update(int v, int tl, int tr, int l, int r, int add) {
    if (l > r) {
        return;
    }
    if (tl == l && tr == r) {
        t[v] += add; return;
    }
    int tm = (tl + tr) >> 1;
    update(v << 1, tl, tm, l, min(r, tm), add); update(v << 1 | 1, tm + 1, tr, max(tm + 1, l), r, add);
}

int get(int v, int tl, int tr, int pos) {
    if (tl == tr) {
        return t[v];
    }
    int tm = (tl + tr) >> 1;
    if (pos <= tm) {
        return t[v] + get(v << 1, tl, tm, pos);
    }
    else {
        return t[v] + get(v << 1 | 1, tm + 1, tr, pos);
    }
}

void solve() {
    scanf("%d %d", &n, &m);
    for (int i = 1; i <= n; i++) {
        scanf("%d", &a[i]);
    }
    for (int i = 2; i <= n; i++) {
        update(1, 1, INF, min(a[i - 1], a[i]), max(a[i - 1], a[i]), 1);
    }
    while (m--) {
        int type; scanf("%d", &type);
        if (type == 1) {
            int pos, val; scanf("%d %d", &pos, &val);
            if (pos > 1) {
                update(1, 1, INF, min(a[pos - 1], a[pos]), max(a[pos - 1], a[pos]), -1);
                update(1, 1, INF, min(a[pos - 1], val), max(a[pos- 1], val), 1);
            }
            if (pos < n) {
                update(1, 1, INF, min(a[pos], a[pos + 1]), max(a[pos], a[pos + 1]), -1);
                update(1, 1, INF, min(a[pos + 1], val), max(a[pos + 1], val), 1);
            }
            a[pos] = val;
        }
        else {
            int H; scanf("%d", &H);
            printf("%d\n", get(1, 1, INF, H));
        }
    }
    return;
}

signed main() {
    // ios_base::sync_with_stdio(0);
    // in; out; // cin >> TN;
    while (TN--) solve();
    return 0;
 }

Compilation message (stderr)

game.cpp: In function 'void solve()':
game.cpp:49:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &n, &m);
     ~~~~~^~~~~~~~~~~~~~~~~
game.cpp:51:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &a[i]);
         ~~~~~^~~~~~~~~~~~~
game.cpp:57:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         int type; scanf("%d", &type);
                   ~~~~~^~~~~~~~~~~~~
game.cpp:59:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             int pos, val; scanf("%d %d", &pos, &val);
                           ~~~~~^~~~~~~~~~~~~~~~~~~~~
game.cpp:71:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             int H; scanf("%d", &H);
                    ~~~~~^~~~~~~~~~

• Subtask 1: 22 / 22
• Subtask 2: 27 / 27
• Subtask 3: 51 / 51