답안 #915351

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
915351 2024-01-23T18:13:45 Z vjudge1 Shortcut (IOI16_shortcut) C++17
컴파일 오류
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#pragma GCC optimize("Ofast,unroll-loops")
#pragma GCC target("avx2,popcnt,lzcnt,abm,bmi,bmi2,fma,tune=native")
#include "shortcut.h"

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

const int N = 1e6;
int64_t a[N], b[N], x[N];
int orda[N], ordb[N];
int n, c;
pair<int, int> max_a(-1, -1), min_b(-1, -1);

int64_t get(int64_t o[], const pair<int, int>& v, const int& j, const int64_t& inf) {
        if (v.first == -1) return inf;
        if (v.first == j) return v.second == -1 ? inf : o[v.second];
        return o[v.first];
};

inline void update(int j) {
        if (max_a.first == -1 || a[j] >= a[max_a.first]) {
                swap(max_a.first, max_a.second);
                max_a.first = j;
        } else if (max_a.second == -1 || a[j] > a[max_a.second]) {
                max_a.second = j;
        }

        if (min_b.first == -1 || b[j] <= b[min_b.first]) {
                swap(min_b.first, min_b.second);
                min_b.first = j;
        } else if (min_b.second == -1 || b[j] < b[min_b.second]) {
                min_b.second = j;
        }
};

inline bool check(const int64_t& target) {
        int64_t low_sum = -1e18, high_sum = +1e18;
        int64_t low_diff = -1e18, high_diff = +1e18;
        const int64_t k = c - target;
        max_a = min_b = make_pair(-1, -1);
        int i = 0;

        for (int z = 0; z < n; z++) {
                int j = orda[z];
                while (i < n && a[j] - b[ordb[i]] > target) update(ordb[i++]);
                low_sum = max(low_sum, a[j] + get(a, max_a, j, -1e18) + k);
                high_sum = min(high_sum, b[j] + get(b, min_b, j, +1e18) - k);
                low_diff = max(low_diff, a[j] - get(b, min_b, j, +1e18) + k);
                high_diff = min(high_diff, b[j] - get(a, max_a, j, -1e18) - k);
                if (low_sum > high_sum || low_diff > high_diff) return 0;
        }

        int low_sum_q = n - 1, low_diff_q = 0, high_sum_q = n - 1, high_diff_q = 0;
        for (int p = 0; p < n; p++) {
                low_diff_q = max(low_diff_q, p + 1);
                while (low_sum_q > p && x[p] + x[low_sum_q] >= low_sum) low_sum_q--;
                while (high_sum_q > p && x[p] + x[high_sum_q] > high_sum) high_sum_q--;
                // (low_sum_q, high_sum_q]
                while (low_diff_q < n && x[low_diff_q] - x[p] < low_diff) low_diff_q++;
                high_diff_q = max(high_diff_q, low_diff_q);
                while (high_diff_q < n && x[high_diff_q] - x[p] <= high_diff) high_diff_q++;
                // [low_diff_q, high_diff_q)

                low_sum_q = max(low_sum_q, p);
                if (low_sum_q >= high_sum_q || low_diff_q >= high_diff_q) continue;
                int max_l = max(low_sum_q + 1, low_diff_q);
                int min_r = min(high_sum_q, high_diff_q - 1);
                if (max_l <= min_r) {
                        return 1;
                }
        }

        return 0;
};

long long find_shortcut(int n, std::vector<int> l, std::vector<int> d, int c) {
        ::n = n, ::c = c;
        for (int i = 1; i < n; i++) x[i] = x[i - 1] + l[i - 1];
        for (int i = 0; i < n; i++) a[i] = x[i] + d[i], b[i] = x[i] - d[i];

        // abs(x[i] - x[p]) + abs(x[j] - x[q]) + d[i] + d[j] + c <= target
        // x[i] - x[p] + x[j] - x[q] + d[i] + d[j] + c <= target
        // x[p] - x[i] + x[j] - x[q] + d[i] + d[j] + c <= target
        // x[i] - x[p] + x[q] - x[j] + d[i] + d[j] + c <= target
        // x[p] - x[i] + x[q] - x[j] + d[i] + d[j] + c <= target

        // x[p] + x[q] >= x[i] + x[j] + d[i] + d[j] + c - target
        // x[p] + x[q] <= x[i] + x[j] - d[i] - d[j] - c + target
        // x[q] - x[p] <= x[j] - x[i] - d[i] - d[j] - c + target
        // x[q] - q[p] >= x[j] - x[i] + d[i] + d[j] + c - target

        // k := c - target
        // x[p] + x[q] >= (x[i] + d[i]) + (x[j] + d[j]) + k
        // x[p] + x[q] <= (x[i] - d[i]) + (x[j] - d[j]) - k
        // x[q] - x[p] <= (x[j] - d[j]) - (x[i] + d[i]) - k
        // x[q] - x[p] >= (x[j] + d[j]) - (x[i] - d[i]) + k

        // x[p] + x[q] >= a[i] + a[j] + k
        // x[p] + x[q] <= b[i] + b[j] - k
        // x[q] - x[p] <= b[j] - a[i] - k
        // x[q] - x[p] >= a[j] - b[i] + k

        iota(orda, orda + n, 0);
        sort(orda, orda + n, [&](int i, int j) { return a[i] < a[j]; });
        iota(ordb, ordb + n, 0);
        sort(ordb, ordb + n, [&](int i, int j) { return b[i] < b[j]; });

        int64_t low = 1, high = 1e15 + 2e9;
        while (low < high) {
                int64_t mid = low + high >> 1;
                if (check(mid)) {
                        high = mid;
                } else {
                        low = mid + 1;
                }
        }
        return high;
}

Compilation message

In file included from /usr/include/x86_64-linux-gnu/c++/10/bits/gthr.h:148,
                 from /usr/include/c++/10/ext/atomicity.h:35,
                 from /usr/include/c++/10/bits/ios_base.h:39,
                 from /usr/include/c++/10/ios:42,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from shortcut.cpp:5:
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:102:1: error: attribute value 'tune=native' was already specified in 'target' attribute
  102 | __gthrw(pthread_once)
      | ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:102:1: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:103:1: error: attribute value 'tune=native' was already specified in 'target' attribute
  103 | __gthrw(pthread_getspecific)
      | ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:103:1: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:104:1: error: attribute value 'tune=native' was already specified in 'target' attribute
  104 | __gthrw(pthread_setspecific)
      | ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:104:1: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:106:1: error: attribute value 'tune=native' was already specified in 'target' attribute
  106 | __gthrw(pthread_create)
      | ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:106:1: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:107:1: error: attribute value 'tune=native' was already specified in 'target' attribute
  107 | __gthrw(pthread_join)
      | ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:107:1: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:108:1: error: attribute value 'tune=native' was already specified in 'target' attribute
  108 | __gthrw(pthread_equal)
      | ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:108:1: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:109:1: error: attribute value 'tune=native' was already specified in 'target' attribute
  109 | __gthrw(pthread_self)
      | ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:109:1: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:110:1: error: attribute value 'tune=native' was already specified in 'target' attribute
  110 | __gthrw(pthread_detach)
      | ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:110:1: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:112:1: error: attribute value 'tune=native' was already specified in 'target' attribute
  112 | __gthrw(pthread_cancel)
      | ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:112:1: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:114:1: error: attribute value 'tune=native' was already specified in 'target' attribute
  114 | __gthrw(sched_yield)
      | ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:114:1: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:116:1: error: attribute value 'tune=native' was already specified in 'target' attribute
  116 | __gthrw(pthread_mutex_lock)
      | ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:116:1: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:117:1: error: attribute value 'tune=native' was already specified in 'target' attribute
  117 | __gthrw(pthread_mutex_trylock)
      | ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:117:1: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:119:1: error: attribute value 'tune=native' was already specified in 'target' attribute
  119 | __gthrw(pthread_mutex_timedlock)
      | ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:119:1: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:121:1: error: attribute value 'tune=native' was already specified in 'target' attribute
  121 | __gthrw(pthread_mutex_unlock)
      | ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:121:1: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:122:1: error: attribute value 'tune=native' was already specified in 'target' attribute
  122 | __gthrw(pthread_mutex_init)
      | ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:122:1: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:123:1: error: attribute value 'tune=native' was already specified in 'target' attribute
  123 | __gthrw(pthread_mutex_destroy)
      | ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:123:1: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:125:1: error: attribute value 'tune=native' was already specified in 'target' attribute
  125 | __gthrw(pthread_cond_init)
      | ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:125:1: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:126:1: error: attribute value 'tune=native' was already specified in 'target' attribute
  126 | __gthrw(pthread_cond_broadcast)
      | ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:126:1: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:127:1: error: attribute value 'tune=native' was already specified in 'target' attribute
  127 | __gthrw(pthread_cond_signal)
      | ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:127:1: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:128:1: error: attribute value 'tune=native' was already specified in 'target' attribute
  128 | __gthrw(pthread_cond_wait)
      | ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:128:1: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:129:1: error: attribute value 'tune=native' was already specified in 'target' attribute
  129 | __gthrw(pthread_cond_timedwait)
      | ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:129:1: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:130:1: error: attribute value 'tune=native' was already specified in 'target' attribute
  130 | __gthrw(pthread_cond_destroy)
      | ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:130:1: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:132:1: error: attribute value 'tune=native' was already specified in 'target' attribute
  132 | __gthrw(pthread_key_create)
      | ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:132:1: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:133:1: error: attribute value 'tune=native' was already specified in 'target' attribute
  133 | __gthrw(pthread_key_delete)
      | ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:133:1: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:134:1: error: attribute value 'tune=native' was already specified in 'target' attribute
  134 | __gthrw(pthread_mutexattr_init)
      | ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:134:1: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:135:1: error: attribute value 'tune=native' was already specified in 'target' attribute
  135 | __gthrw(pthread_mutexattr_settype)
      | ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:135:1: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:136:1: error: attribute value 'tune=native' was already specified in 'target' attribute
  136 | __gthrw(pthread_mutexattr_destroy)
      | ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:136:1: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:237:10: error: attribute value 'tune=native' was already specified in 'target' attribute
  237 | __gthrw2(__gthrw_(__pthread_key_create),
      |          ^~~~~~~~
/usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:237:10: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/c++/10/shared_mutex:73:3: error: attribute value 'tune=native' was already specified in 'target' attribute
   73 |   _GLIBCXX_GTHRW(rwlock_rdlock)
      |   ^~~~~~~~~~~~~~
/usr/include/c++/10/shared_mutex:73:3: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/c++/10/shared_mutex:74:3: error: attribute value 'tune=native' was already specified in 'target' attribute
   74 |   _GLIBCXX_GTHRW(rwlock_tryrdlock)
      |   ^~~~~~~~~~~~~~
/usr/include/c++/10/shared_mutex:74:3: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/c++/10/shared_mutex:75:3: error: attribute value 'tune=native' was already specified in 'target' attribute
   75 |   _GLIBCXX_GTHRW(rwlock_wrlock)
      |   ^~~~~~~~~~~~~~
/usr/include/c++/10/shared_mutex:75:3: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/c++/10/shared_mutex:76:3: error: attribute value 'tune=native' was already specified in 'target' attribute
   76 |   _GLIBCXX_GTHRW(rwlock_trywrlock)
      |   ^~~~~~~~~~~~~~
/usr/include/c++/10/shared_mutex:76:3: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/c++/10/shared_mutex:77:3: error: attribute value 'tune=native' was already specified in 'target' attribute
   77 |   _GLIBCXX_GTHRW(rwlock_unlock)
      |   ^~~~~~~~~~~~~~
/usr/include/c++/10/shared_mutex:77:3: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/c++/10/shared_mutex:91:4: error: attribute value 'tune=native' was already specified in 'target' attribute
   91 |    __gthrw(pthread_rwlock_timedrdlock);
      |    ^~~~~~~
/usr/include/c++/10/shared_mutex:91:4: error: attribute value 'tune=native' was already specified in 'target' attribute
/usr/include/c++/10/shared_mutex:101:4: error: attribute value 'tune=native' was already specified in 'target' attribute
  101 |    __gthrw(pthread_rwlock_timedwrlock);
      |    ^~~~~~~
/usr/include/c++/10/shared_mutex:101:4: error: attribute value 'tune=native' was already specified in 'target' attribute
shortcut.cpp: In function 'long long int find_shortcut(int, std::vector<int>, std::vector<int>, int)':
shortcut.cpp:110:35: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  110 |                 int64_t mid = low + high >> 1;
      |                               ~~~~^~~~~~