제출 #1033595

#제출 시각아이디문제언어결과실행 시간메모리
1033595ThanhsTrains (BOI24_trains)C++14
0 / 100
2041 ms612 KiB
// #pragma GCC optimize("Ofast") // #pragma GCC optimize("unroll-loops") #include <bits/stdc++.h> using namespace std; // #define int long long // #define double long double #define endl '\n' #define fastIO ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr); #define setmin(x, y) x = min((x), (y)) #define setmax(x, y) x = max((x), (y)) #define sqr(x) ((x) * (x)) #define fi first #define se second #define all(x) x.begin(), x.end() // mt19937 hdp(chrono::high_resolution_clock::now().time_since_epoch().count()); // int rand(int l, int r){return l + ((hdp() % (r - l + 1)) + r - l + 1) % (r - l + 1);} const int NM = 5e2 + 5; const int mod = 1e9 + 7; int n, ans, p, d[NM][NM], b[NM], c[NM]; void sub1() { for (int i = 1; i <= n; i++) ans += (d[i][1] == i); cout << ans << endl; for (int i = 1; i <= n; i++) if (d[i][1] == i) cout << i << ' '; } void sub2() { for (int i = 1; i <= n; i++) b[d[i][1]] = 1; for (int i = 1; i <= n; i++) for (int j = 1; j <= n; j++) { c[d[i][j]] = 1; if (d[i][j] == i || b[d[i][j]]) break; cout << d[i][j] << endl; } for (int i = 1; i <= n; i++) c[i] |= b[i]; cout << accumulate(c + 1, c + 1 + n, 0) << endl; for (int i = 1; i <= n; i++) if (c[i]) cout << i << ' '; } signed main() { fastIO if (fopen("in.txt", "r")) { freopen("in.txt", "r", stdin); freopen("out.txt", "w", stdout); } cin >> n; for (int i = 1; i <= n; i++) for (int j = 1; j <= n; j++) cin >> d[i][j]; cin >> p; if (p == 1) sub1(); else sub2(); }

컴파일 시 표준 에러 (stderr) 메시지

Main.cpp: In function 'int main()':
Main.cpp:60:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   60 |         freopen("in.txt", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
Main.cpp:61:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   61 |         freopen("out.txt", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
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