Submission #684838

#	Time	Username	Problem	Language	Result	Execution time	Memory
684838		stevancv	Jousting tournament (IOI12_tournament)	C++14	0 / 100	138 ms	2204 KiB

tournament

#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define sp ' '
#define en '\n'
#define smin(a, b) a = min(a, b)
#define smax(a, b) a = max(a, b)
using namespace std;
const int N = 1e5 + 2;
const int inf = 1e9;
int l[N], r[N], ans[N], gde[N];
vector<int> b;
bool Has(int x, int y) {
    auto it = lower_bound(b.begin(), b.end(), x);
    if (it == b.end()) return false;
    return *it < y;
}
int GetBestPosition(int n, int q, int k, int *p, int *s, int *e) {
    for (int i = 0; i < n - 1; i++) if (p[i] > k) b.push_back(i);
    for (int i = 0; i < n; i++) l[i] = r[i] = gde[i] = i;
    for (int i = 0; i < q; i++) {
        int idx = gde[s[i]]; int idy = gde[e[i]];
        r[idx] = r[idy];
        for (int i = s[i] + 1; i <= n - 1 - e[i] + s[i]; i++) gde[i] = gde[i + e[i] - s[i]];
        if (!Has(l[idx], r[idx])) {
            ans[l[idx]]++;
            ans[r[idx] + 1]--;
        }
    }
    int pos = 0;
    for (int i = 0; i < n; i++) {
        if (i > 0) ans[i] += ans[i - 1];
        if (ans[i] > ans[pos]) pos = i;
    }
    return pos;
}

Compilation message (stderr)

tournament.cpp: In function 'int GetBestPosition(int, int, int, int*, int*, int*)':
tournament.cpp:24:24: warning: 'i' may be used uninitialized in this function [-Wmaybe-uninitialized]
   24 |         for (int i = s[i] + 1; i <= n - 1 - e[i] + s[i]; i++) gde[i] = gde[i + e[i] - s[i]];
      |                        ^

• Subtask 1: 0 / 17
• Subtask 2: 0 / 32
• Subtask 3: 0 / 51