Submission #118236

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
118236	2019-06-18 12:04:58	songc	Designated Cities (JOI19_designated_cities)	C++14	100 / 100	696 ms	46860 KiB

designated_cities

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#include <bits/stdc++.h>
using namespace std;
typedef long long LL;
typedef pair<LL, int> pii;
int N, Q;
vector<pii> G[202020], RG[202020];
int deg[202020];
bool chk[202020];
LL ans[202020], sum;
priority_queue<pii> PQ;
LL d(int u, int p){
    LL ret = 0;
    for (pii v : RG[u]) if (v.second != p) ret += d(v.second, u) + v.first;
    return ret;
}
void f(int u, int p){
    ans[1] = min(ans[1], sum);
    for (int i=0; i<(int)G[u].size(); i++){
        if (G[u][i].second == p) continue;
        sum -= RG[u][i].first;
        sum += G[u][i].first;
        f(G[u][i].second, u);
        sum += RG[u][i].first;
        sum -= G[u][i].first;
    }
}
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

designated_cities.cpp: In function 'int main()':
designated_cities.cpp:35:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &N);
     ~~~~~^~~~~~~~~~
designated_cities.cpp:37:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d %lld %lld", &u, &v, &x, &y);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
designated_cities.cpp:70:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &Q);
     ~~~~~^~~~~~~~~~
designated_cities.cpp:72:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &u);
         ~~~~~^~~~~~~~~~

• Subtask 1: 6 / 6
• Subtask 2: 7 / 7
• Subtask 3: 9 / 9
• Subtask 4: 17 / 17
• Subtask 5: 17 / 17
• Subtask 6: 44 / 44