Submission #123841

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
123841	2019-07-02 07:49:02	FutymyClone	Building Bridges (CEOI17_building)	C++14	100 / 100	135 ms	66532 KiB

building

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#include <bits/stdc++.h>
using namespace std;
const int N = 1e5 + 5;
const long long inf = 1LL << 62;
const int maxn = 1e6 + 5;
int n, h[N], w[N];
long long dp[N], f[N];
struct Line {
    int a;
    long long b;
    Line (int a = 0, long long b = inf): a(a), b(b) {}
    long long f (int x) {
        return 1LL * a * x + b;
    }
} node[maxn << 2];
struct LiChaoTree {
    void add (int i, int l, int r, Line val) {
        if (node[i].f(l) >= val.f(l) && node[i].f(r) >= val.f(r)) {
            node[i] = val;
            return;
        }
        if (node[i].f(l) <= val.f(l) && node[i].f(r) <= val.f(r)) return;
        int mid = l + r >> 1;
 
 
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Compilation message (stderr)

building.cpp: In member function 'void LiChaoTree::add(int, int, int, Line)':
building.cpp:30:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
         int mid = l + r >> 1;
                   ~~^~~
building.cpp: In member function 'long long int LiChaoTree::query(int, int, int, int)':
building.cpp:38:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
         int mid = l + r >> 1;
                   ~~^~~
building.cpp: In function 'int main()':
building.cpp:45:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
     ~~~~~^~~~~~~~~~
building.cpp:46:39: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for (int i = 1; i <= n; i++) scanf("%d", &h[i]);
                                  ~~~~~^~~~~~~~~~~~~
building.cpp:47:39: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for (int i = 1; i <= n; i++) scanf("%d", &w[i]);
                                  ~~~~~^~~~~~~~~~~~~

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