結果
問題 | No.1103 Directed Length Sum |
ユーザー |
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提出日時 | 2020-08-17 16:13:59 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 1,589 bytes |
コンパイル時間 | 1,354 ms |
コンパイル使用メモリ | 118,140 KB |
最終ジャッジ日時 | 2025-01-13 02:36:47 |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 21 WA * 1 |
コンパイルメッセージ
main.cpp: In function ‘void get(std::vector<long long int>&)’: main.cpp:25:38: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 25 | void get(vll &a){re(i,a.size()) scanf("%lld",&a[i]);} | ~~~~~^~~~~~~~~~~~~~ main.cpp: In function ‘void get(std::vector<std::vector<long long int> >&)’: main.cpp:26:56: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 26 | void get(vvl &a){re(i,a.size()) re(j,a[0].size()) scanf("%lld",&a[i][j]);} | ~~~~~^~~~~~~~~~~~~~~~~ main.cpp: In function ‘int main(int, const char**)’: main.cpp:48:18: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 48 | ll a, b;scanf("%lld %lld", &a, &b); | ~~~~~^~~~~~~~~~~~~~~~~~~~~
ソースコード
#include <iostream> #include <string> #include <vector> #include <queue> #include <deque> #include <algorithm> #include <set> #include <map> #include <bitset> #include <cmath> #include <functional> #include <iomanip> #define vll vector<ll> #define vvvl vector<vvl> #define vvl vector<vector<ll>> #define VV(a, b, c, d) vector<vector<d>>(a, vector<d>(b, c)) #define VVV(a, b, c, d) vector<vvl>(a, vvl(b, vll (c, d))); #define re(c, b) for(ll c=0;c<b;c++) #define rep(a,b,c) for(ll a=b;a<c;a++) #define all(obj) (obj).begin(), (obj).end() typedef long long int ll; typedef long double ld; using namespace std; void get(vll &a){re(i,a.size()) scanf("%lld",&a[i]);} void get(vvl &a){re(i,a.size()) re(j,a[0].size()) scanf("%lld",&a[i][j]);} void print(vll &a){re(i,a.size()) cout<<a[i]<<(i==a.size()-1?"\n":" ");} void print(vvl &a){re(i,a.size()) re(j,a[0].size())cout<<a[i][j]<<(j==a[0].size()-1?"\n":" ");} vvl G = VV(1000001, 0, 0, ll); int dist[1000001], c[1000001], ans[1000001]; void f(ll now, ll from){ for(auto to:G[now]){ if(to==from) continue; f(to, now); ans[now] += dist[to] + c[to]; dist[now] += dist[to] + c[to]; c[now] += c[to]; } c[now]++; } int main(int argc, char const *argv[]) { ll n;std::cin >> n; vll use(n+1, 0); re(i, n-1){ ll a, b;scanf("%lld %lld", &a, &b); G[a].push_back(b); G[b].push_back(a); use[b] = 1; } ll root = -1; for(int i=1;i<=n;i++) { if(!use[i]) { root = i; break; } } f(root, -1); ll s = 0; for(int i=1;i<=n;i++) s += ans[i]; std::cout << s%1000000007 << '\n'; }