제출 #27025

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
27025		top34051	Bulldozer (JOI17_bulldozer)	C++14	0 / 100	3 ms	384 KiB

bulldozer

#include<bits/stdc++.h>
using namespace std;
#define maxn 100005
struct node {
    int x,y;
    long long w;
};
int n,sz;
long long mx[maxn*4];
long long L[maxn*4];
long long R[maxn*4];
long long tree[maxn];
node p[maxn];
map<long long,int> mp;
void add(int x,long long val) {
    while(x<=100) {
        tree[x] += val;
        x += x&-x;
    }
}
long long sum(int x) {
    int ans = 0;
    while(x) {
        ans += tree[x];
        x -= x&-x;
    }
    return ans;
}
void update(int pos,int l,int r,int x,long long val) {
    if(l>x || r<x) return ;
    if(l==r) {
        mx[pos] = L[pos] = R[pos] = val;
//        printf("pos = %d (%d - %d) : mx = %lld L = %lld R = %lld\n",pos,l,r,mx[pos],L[pos],R[pos]);
        return ;
    }
    int mid = (l+r)/2;
    update(pos<<1,l,mid,x,val); update(pos<<1|1,mid+1,r,x,val);
    mx[pos] = max(max(mx[pos<<1],mx[pos<<1|1]),max(0LL,R[pos<<1])+max(0LL,L[pos<<1|1]));
    L[pos] = L[pos<<1] + ((L[pos<<1]==sum(mid)-sum(l-1)) ? max(0LL,L[pos<<1|1]) : 0);
    R[pos] = R[pos<<1|1] + ((R[pos<<1|1]==sum(r)-sum(mid)) ? max(0LL,R[pos<<1]) : 0);
//    printf("pos = %d (%d - %d) : mx = %lld L = %lld R = %lld\n",pos,l,r,mx[pos],L[pos],R[pos]);
}
void cpidx() {
    int i;
    map<long long,int>::iterator it;
    for(i=1;i<=n;i++) mp[p[i].x];
    for(it=mp.begin();it!=mp.end();++it) it->second = ++sz;
}
main() {
    int i;
    scanf("%d",&n);
    if(n>100) printf("%d",1/0);
    for(i=1;i<=n;i++) scanf("%d%d%lld",&p[i].x,&p[i].y,&p[i].w);
    cpidx();
    for(i=1;i<=n;i++) {
//        printf("UPD %d(%d) : %lld\n",p[i].x,mp[p[i].x],p[i].w);
        update(1,1,sz,mp[p[i].x],p[i].w);
        add(mp[p[i].x],p[i].w);
//        printf("-----\n");
    }
    printf("%lld",max(0LL,mx[1]));
}

컴파일 시 표준 에러 (stderr) 메시지

bulldozer.cpp:49:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main() {
      ^
bulldozer.cpp: In function 'int main()':
bulldozer.cpp:52:28: warning: division by zero [-Wdiv-by-zero]
     if(n>100) printf("%d",1/0);
                           ~^~
bulldozer.cpp:51:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
     ~~~~~^~~~~~~~~
bulldozer.cpp:53:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(i=1;i<=n;i++) scanf("%d%d%lld",&p[i].x,&p[i].y,&p[i].w);
                       ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 20
• Subtask 3: 0 / 35
• Subtask 4: 0 / 20
• Subtask 5: 0 / 20