Submission #1162403

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1162403	2025-03-06 06:42:15	blackslex	Building Bridges (CEOI17_building)	C++20	100 / 100	42 ms	9800 KiB

building

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#include<bits/stdc++.h>
using namespace std;
using ll = long long;
int n;
bool qrm;
struct line {
    ll m, c;
    mutable ll p;
    line(ll p) : p(p) {}
    line(ll m, ll c) : m(m), c(c) {}
    friend bool operator < (const line &l1, const line &l2) {
        return (qrm ? l1.p < l2.p : l1.m > l2.m);
    }
};
struct convex:multiset<line> {
    ll div (ll a, ll b) {
        return (a / b) - ((a ^ b) < 0 && a % b);
    }
    bool ck (iterator x, iterator y) {
        if (y == end()) return x->p = 1e18, 0;
        if (x->m == y->m) x->p = x->c <= y->c ? 1e18 : -1e18;
        else x->p = div(x->c - y->c, y->m - x->m);
        return x->p >= y->p;
    }
    void add (ll m, ll c) {
        auto y = insert(line(m, c)), x = y++;
 
 
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Compilation message (stderr)

building.cpp: In function 'int main()':
building.cpp:43:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   43 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
building.cpp:45:39: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   45 |     for (int i = 1; i <= n; i++) scanf("%lld", &h[i]);
      |                                  ~~~~~^~~~~~~~~~~~~~~
building.cpp:47:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   47 |         scanf("%lld", &w[i]);
      |         ~~~~~^~~~~~~~~~~~~~~

• Subtask 1: 30 / 30
• Subtask 2: 30 / 30
• Subtask 3: 40 / 40