Submission #139852

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
139852	2019-08-01 14:43:28	ae04071	Valley (BOI19_valley)	C++11	100 / 100	400 ms	22704 KiB

valley

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#include <bits/stdc++.h>
using namespace std;
using lli = long long;
const lli INF = 1e17;
struct seg_tr{
    const static int MAX = 1<<17;
    lli tr[MAX<<1];
    void init() {
        for(int i=0;i<MAX+MAX;i++) tr[i] = INF;
    }
    void upd(int cur,lli val) {
        cur+=MAX;
        tr[cur] = val;
        cur>>=1;
        while(cur) {
            int nx=cur<<1;
            tr[cur] = min(tr[nx],tr[nx+1]);
            cur>>=1;
        }
    }
    lli get(int l,int r) {
        lli ret = INF;
        l+=MAX; r+=MAX;
        while(l<=r) {
            ret = min({ret, tr[l],tr[r]});
            if(l&1) l++;
            if(!(r&1)) r--;
            l>>=1; r>>=1;
        }
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

valley.cpp: In function 'int main()':
valley.cpp:69:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d%d%d",&n,&m,&q,&r);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
valley.cpp:71:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d%d",&ea[i].u,&ea[i].v,&ea[i].w);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
valley.cpp:77:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&v);
         ~~~~~^~~~~~~~~
valley.cpp:84:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d",&a,&b);
         ~~~~~^~~~~~~~~~~~~~

• Subtask 1: 9 / 9
• Subtask 2: 27 / 27
• Subtask 3: 23 / 23
• Subtask 4: 41 / 41