Submission #37706

#	Time	Username	Problem	Language	Result	Execution time	Memory
37706		adlet	Simple game (IZhO17_game)	C++14	100 / 100	539 ms	37180 KiB

game

#include <bits/stdc++.h>

using namespace std;

const int N = 1e6 + 5;
const int INF = 1e9 + 5;

int n, m, pos[N], t[N * 4], z[N * 4];

inline void push(int v, int tl, int tr) {
    if (z[v] != 0) {
        if (tl != tr) {
            t[v * 2] += z[v];
            t[v * 2 + 1] += z[v];
            z[v * 2] += z[v];
            z[v * 2 + 1] += z[v];
        }
        z[v] = 0;
    }
}

inline void upd(int v, int tl, int tr, int l, int r, int x) {
    push(v, tl, tr);
    if (tl > r || tr < l) {
        return;
    }
    if (tl >= l && tr <= r) {
        t[v] += x;
        z[v] += x;
        push(v, tl, tr);
        return;
    }
    push(v, tl, tr);
    int tm = (tl + tr) / 2;
    upd(v * 2, tl, tm, l, r, x);
    upd(v * 2 + 1, tm + 1, tr, l, r, x);
    t[v] = min(t[v * 2], t[v * 2 + 1]);
}

int get(int v, int tl, int tr, int l, int r) {
    push(v, tl, tr);
    if (tl > r || tr < l)
        return INF;
    if (tl >= l && tr <= r)
        return t[v];
    push(v, tl, tr);
    int tm = (tl + tr) / 2;
    return min(get(v * 2, tl, tm, l, r),
               get(v * 2 + 1, tm + 1, tr, l, r));
}

int main() {
//    freopen("game.in", "r", stdin);
//    freopen("game.out", "w", stdout);
    scanf("%d%d", &n, &m);
    for (int i = 1; i <= n; ++i) {
        scanf("%d", &pos[i]);
        if (i > 1)
            upd(1, 1, N, min(pos[i], pos[i - 1]), max(pos[i], pos[i - 1]), 1);
    }
    for (int i = 1; i <= m; ++i) {
        int type;
        scanf("%d", &type);
        if (type == 1) {
            int j, val;
            scanf("%d%d", &j, &val);
            if (j > 1) {
                upd(1, 1, N, min(pos[j], pos[j - 1]),  max(pos[j], pos[j - 1]), -1);
                upd(1, 1, N, min(pos[j - 1], val), max(pos[j - 1], val), 1);
            }
            if (j < n) {
                upd(1, 1, N, min(pos[j], pos[j + 1]), max(pos[j], pos[j + 1]), -1);
                upd(1, 1, N, min(pos[j + 1], val), max(pos[j + 1], val), 1);
            }
            pos[j] = val;
        } else {
            int h, cnt = 0;
            scanf("%d", &h);
            printf("%d\n", get(1, 1, N, h, h));
        }
    }
}

Compilation message (stderr)

game.cpp: In function 'int main()':
game.cpp:77:20: warning: unused variable 'cnt' [-Wunused-variable]
             int h, cnt = 0;
                    ^
game.cpp:55:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &n, &m);
                          ^
game.cpp:57:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &pos[i]);
                             ^
game.cpp:63:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &type);
                           ^
game.cpp:66:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d%d", &j, &val);
                                    ^
game.cpp:78:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d", &h);
                            ^

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