제출 #1137439

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1137439		icoder178	Harbingers (CEOI09_harbingers)	C++17	0 / 100	132 ms	131072 KiB

harbingers

#include<iostream>
#include<algorithm>
using namespace std;
#define int long long
const int maxv = (int) 4e18;
const int maxn = 100005;
int n,dst[maxn],dp[maxn],rmv[maxn],s[maxn],v[maxn],connl[maxn],connr[maxn],ncnt = 0,rcnt = 0,chcnt = 0;
pair<int,int> nconn[maxn],rmvd[maxn],cht[maxn];
pair<int,pair<int,int> > conn[maxn*2];
inline void fdp(int pos) {
    int l = -5, r = chcnt+5;
    while(l+1 < r) {
        int mid = (l+r)/2;
        bool isDecr;
        if(mid < 0) isDecr = true;
        else if(mid >= chcnt-1) isDecr = false;
        else {
            int vl1 = cht[mid].second-v[pos]*cht[mid].first;
            int vl2 = cht[mid+1].second-v[pos]*cht[mid+1].first;
            isDecr = (vl2 < vl1);
        }
        if(isDecr == true) l = mid;
        else r = mid;
    }
    dp[pos] = cht[r].second-v[pos]*cht[r].first+v[pos]*dst[pos]+s[pos];
}
inline void prmv(int pos) {
    int l = -5, r = chcnt+5;
    while(l+1 < r) {
        int mid = (l+r)/2;
        bool isV;
        if(mid < 0) isV = true;
        else if(mid >= (chcnt-1)) isV = false;
        else {
            __int128_t x1 = cht[mid].first;
            __int128_t y1 = cht[mid].second;
            __int128_t x2 = cht[mid+1].first;
            __int128_t y2 = cht[mid+1].second;
            __int128_t x3 = dst[pos];
            __int128_t y3 = dp[pos];
            __int128_t v1 = (y3-y2)*(x2-x1);
            __int128_t v2 = (y2-y1)*(x3-x2);
            isV = (v1 > v2);
        }
        if(isV) l = mid;
        else r = mid;
    }
    rmv[pos] = r+1;
}
void dfs(int pos, int prevP) {
    for(int i = connl[pos]; i < connr[pos]; i++) {
        dfs(conn[i].first,pos);
    }
    // int ncl = ncnt;
    // for(int i = connl[pos]; i < connr[pos]; i++) {
    //     int targP = conn[i].second.first;
    //     int newV = conn[i].second.second;
    //     if(targP != prevP) {
    //         dst[targP] = dst[pos]+newV;
    //         fdp(targP);
    //         prmv(targP);
    //         nconn[ncnt].first = rmv[targP];
    //         nconn[ncnt].second = targP;
    //         ncnt++;
    //     }
    // }
    // int ncr = ncnt;
    // sort(nconn+ncl,nconn+ncr);
    // int rcl = rcnt;
    // for(int i = ncr-1; i >= ncl; i--) {
    //     while(chcnt > nconn[i].first) {
    //         rmvd[rcnt] = cht[chcnt-1];
    //         rcnt++;
    //         chcnt--;
    //     }
    //     int targP = nconn[i].second;
    //     cht[chcnt].first = dst[targP];
    //     cht[chcnt].second = dp[targP];
    //     chcnt++;
    //     dfs(targP,pos);
    //     chcnt--;
    // }
    // ncnt = ncl;
    // int rcr = rcnt;
    // for(int i = rcr-1; i >= rcl; i--) {
    //     cht[chcnt] = rmvd[i];
    //     chcnt++;
    // }
    // rcnt = rcl;
}
signed main () {
    scanf("%lld",&n);
    for(int i = 0; i < n-1; i++) {
        int a,b,c;
        scanf("%lld%lld%lld",&conn[i*2].first,&conn[i*2].second.first,&conn[i*2].second.second);
        conn[i*2+1].first = conn[i*2].second.first;
        conn[i*2+1].second.first = conn[i*2].first;
        conn[i*2+1].second.second = conn[i*2].second.second;
    }
    sort(conn,conn+n*2-2);
    for(int i = 0; i < n*2-2; i++) {
        connr[conn[i].first] = i+1;
    }
    for(int i = n*2-3; i >= 0; i--) {
        connl[conn[i].first] = i;
    }
    for(int i = 2; i <= n; i++) {
        scanf("%lld%lld",&s[i],&v[i]);
    }
    chcnt++;
    dfs(1,-1);
    for(int i = 2; i <= n; i++) {
        printf("%lld ",dp[i]);
    }
    printf("\n");
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

harbingers.cpp: In function 'int main()':
harbingers.cpp:92:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   92 |     scanf("%lld",&n);
      |     ~~~~~^~~~~~~~~~~
harbingers.cpp:95:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   95 |         scanf("%lld%lld%lld",&conn[i*2].first,&conn[i*2].second.first,&conn[i*2].second.second);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
harbingers.cpp:108:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  108 |         scanf("%lld%lld",&s[i],&v[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 100