Submission #336415

#	Time	Username	Problem	Language	Result	Execution time	Memory
336415		Joshc	Tenis (COI19_tenis)	C++11	100 / 100	266 ms	6892 KiB

tenis

#include <cstdio>
#include <algorithm>
using namespace std;

int n, pos[3][100001], seg[400001], seg2[400001];

void update(int v, int tl, int tr, int pos, int x) {
    if (tl == tr) {
        seg[v] += x;
        seg2[v] += x;
    } else {
        int tm = (tl+tr) >> 1;
        if (pos <= tm) update(v<<1, tl, tm, pos, x);
        else update(v<<1|1, tm+1, tr, pos, x);
        seg[v] = min(seg[v<<1], seg2[v<<1]+seg[v<<1|1]);
        seg2[v] = seg2[v<<1]+seg2[v<<1|1];
    }
}

int query(int v, int tl, int tr, int s) {
    if (tl == tr) return tl;
    int tm = (tl+tr) >> 1;
    if (seg[v<<1] <= s) return query(v<<1, tl, tm, s);
    return query(v<<1|1, tm+1, tr, s-seg2[v<<1]);
}

void change(int v, int x) {
    update(1, 1, n, min(min(pos[0][v], pos[1][v]), pos[2][v]), x);
    update(1, 1, n, max(max(pos[0][v], pos[1][v]), pos[2][v]), -x);
}

int main() {
    int q, t, x, y, z, cur = -1;
    scanf("%d%d", &n, &q);
    for (int i=0; i<3; i++) {
        for (int j=1; j<=n; j++) {
            scanf("%d", &x);
            pos[i][x] = j;
        }
    }
    for (int i=1; i<=n; i++) change(i, 1);
    while (q--) {
        scanf("%d%d", &t, &x);
        if (t == 1) printf(pos[0][x] <= (cur == -1 ? cur = query(1, 1, n, 0) : cur) ? "DA\n" : "NE\n");
        else {
            scanf("%d%d", &y, &z);
            change(y, -1);
            change(z, -1);
            swap(pos[x-1][y], pos[x-1][z]);
            change(y, 1);
            change(z, 1);
            cur = -1;
        }
    }
}

Compilation message (stderr)

tenis.cpp: In function 'int main()':
tenis.cpp:34:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   34 |     scanf("%d%d", &n, &q);
      |     ~~~~~^~~~~~~~~~~~~~~~
tenis.cpp:37:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   37 |             scanf("%d", &x);
      |             ~~~~~^~~~~~~~~~
tenis.cpp:43:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   43 |         scanf("%d%d", &t, &x);
      |         ~~~~~^~~~~~~~~~~~~~~~
tenis.cpp:46:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   46 |             scanf("%d%d", &y, &z);
      |             ~~~~~^~~~~~~~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 11 / 11
• Subtask 3: 12 / 12
• Subtask 4: 21 / 21
• Subtask 5: 49 / 49