Submission #479668

#	Time	Username	Problem	Language	Result	Execution time	Memory
479668		aris12345678	Deda (COCI17_deda)	C++14	0 / 140	819 ms	8644 KiB

deda

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
#define X first
#define Y second

const int mxN = 200005;
int st[4*mxN], a[mxN];

void update(int p, int l, int r, int i, int v) {
    if(l == r)
        st[p] = v;
    else {
        int md = (l+r)/2;
        if(i <= md)
            update(2*p, l, md, i, v);
        else
            update(2*p+1, md+1, r, i, v);
        st[p] = min(st[2*p], st[2*p+1]);
    }
}

int Min(int p, int l, int r, int i, int j) {
    if(i > r || l > j)
        return INT_MAX;
    if(i <= l && r <= j)
        return st[p];
    int md = (l+r)/2;
    return min(Min(2*p, l, md, i, j), Min(2*p+1, md+1, r, i, j));
}

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    int n, q;
    scanf("%d %d\n", &n, &q);
    fill(st, st+4*mxN, INT_MAX);
    fill(a, a+n, INT_MAX);
    while(q--) {
        char type;
        int l, r;
        cin >> type >> l >> r;
        if(type == 'M') {
            update(1, 1, n, r, l);
            a[r] = l;
        } else {
            int st = r, en = n, md, ans = -1;
            while(st <= en) {
                md = (st+en)/2;
                // cout << st << " " << md << " " << a[md] << " " << en << " " << ans << "\n";
                if(md-1 >= r && Min(1, 1, n, r, md-1) <= l)
                    en = md-1;
                else if(a[md] <= l) {
                    ans = md;
                    break;
                } else
                    st = md+1;
            }
            printf("%d\n", ans);
        }
    }
    return 0;
}

Compilation message (stderr)

deda.cpp: In function 'int main()':
deda.cpp:38:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |     scanf("%d %d\n", &n, &q);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 140