Submission #56541

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
56541	2018-07-11 15:12:25	admin	Islands (IOI08_islands)	C++14	90 / 100	702 ms	131908 KiB

islands

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#include <bits/stdc++.h>
using namespace std;
using ll = long long;
 
const int N = 1000010; 
const ll INF = 1e18;
ll par[N], len[N], deg[N], h1[N], h2[N], dp[N];
 
int main()
{
    int n;
    scanf("%d", &n);
    for (int i = 1; i <= n; ++i) {
        int v, w;
        scanf("%d%d", &v, &w);
        par[i] = v;
        len[i] = w;
        ++deg[v];
    }
    queue<int> Q;
    for (int i = 1; i <= n; ++i) {
        if (deg[i] == 0)
            Q.push(i);
    }
    while (!Q.empty()) {
        int u = Q.front(); Q.pop();
        int v = par[u];
        ll w = len[u];
        if (h1[u]+w > h1[v]) {
            h2[v] = h1[v];
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

islands.cpp: In function 'int main()':
islands.cpp:12:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
     ~~~~~^~~~~~~~~~
islands.cpp:15:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d", &v, &w);
         ~~~~~^~~~~~~~~~~~~~~~

• Subtask 1: 33 / 33
• Subtask 2: 3 / 3
• Subtask 3: 4 / 4
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 0 / 10