제출 #74695

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
74695		Vardanyan	Boat (APIO16_boat)	C++14	0 / 100	1541 ms	525312 KiB

boat

//#pragma GCC optimize "-O3"
#include <bits/stdc++.h>
using namespace std;
int a[505],b[505];
const int MOD = 1000*1000*1000+7;
struct node{
    node *l;
    node *r;
    int val;
    node():l(NULL),r(NULL),val(0){}
};
void update(node *v, int s,int e,int l,int r,int val){
    if(l>r) return;
    if(s == l && e == r){
        v->val += val;
        return;
    }
    int m = (s+e)/2;
    if(v->l == NULL){
        v->l = new node();
        v->r = new node();
    }
    update(v->l,s,m,l,min(m,r),val);
    update(v->r,m+1,e,max(l,m+1),r,val);
    v->val = (v->l->val+v->r->val)%MOD;
}
int query(node *v, int s,int e,int l,int r){
    if(v == NULL) return 0;
    if(l>r) return 0;
    if(s == l && e == r)  return v->val;
    int m = (s+e)/2;
    return (query(v->l,s,m,l,min(m,r))+query(v->r,m+1,e,max(l,m+1),r))%MOD;
}
int main(){
    int n;
    scanf("%d",&n);
    for(int i = 1;i<=n;i++){
        scanf("%d%d",&a[i],&b[i]);
    }
    node* root = new node();;
    for(int i = 1;i<=n;i++){
        vector<int> v;
        int p = 0;
        for(int j = a[i];j<=b[i];j++){
            int x = query(root,1,1000*1000*1000,1,j-1);
            v.push_back(x);
        }
        for(int j = a[i];j<=b[i];j++){
            update(root,1,1000*1000*1000,j,j,v[p]+1);
            p++;
        }
    }
    cout<<query(root,1,1000*1000*1000,1,1000*1000*1000)<<endl;
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

boat.cpp: In function 'int main()':
boat.cpp:36:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
     ~~~~~^~~~~~~~~
boat.cpp:38:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d",&a[i],&b[i]);
         ~~~~~^~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 9
• Subtask 2: 0 / 22
• Subtask 3: 0 / 27
• Subtask 4: 0 / 42