제출 #320786

#제출 시각아이디문제언어결과실행 시간메모리
320786aZvezda건물 4 (JOI20_building4)C++14
컴파일 에러
0 ms0 KiB
#include <bits/stdc++.h> using namespace std; //#pragma GCC optimize ("O3") //#pragma GCC target ("sse4") #define endl "\n" typedef long long ll; template<class T, class T2> inline ostream &operator <<(ostream &out, const pair<T, T2> &x) { out << x.first << " " << x.second; return out;} template<class T, class T2> inline istream &operator >>(istream &in, pair<T, T2> &x) { in >> x.first >> x.second; return in;} template<class T, class T2> inline bool chkmax(T &x, const T2 &y) { return x < y ? x = y, 1 : 0; } template<class T, class T2> inline bool chkmin(T &x, const T2 &y) { return x > y ? x = y, 1 : 0; } const ll mod = 1e9 + 7; #define out(x) "{" << (#x) << ": " << x << "} " const ll MAX_N = 5e5 + 10; ll n; ll arr[MAX_N][2]; ll dpLow[MAX_N][2], dpHigh[MAX_N][2]; bool output(ll x, ll y, ll got = mod) { if(x == -1) {return true;} if(dpLow[x][0] <= y && y <= dpHigh[x][0] && arr[x][0] <= got) { output(x - 1, y, arr[x][0]); cout << "A"; return true; } else if(dpLow[x][1] <= y && y <= dpHigh[x][1] && arr[x][1] <= got) { output(x - 1, y - 1, arr[x][1]); cout << "B"; return true; } return false; } signed main() { ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL); cin >> n; n *= 2; for(ll j = 0; j < 2; j ++) { for(ll i = 0; i < n; i ++ ){ cin >> arr[i][j]; } } for(ll i = 0; i < n; i ++) { dpLow[i][0] = dpLow[i][1] = mod; dpHigh[i][0] = dpHigh[i][1] = -mod; }in dpLow[0][0] = 0; dpHigh[0][0] = 0; dpLow[0][1] = 1; dpHigh[0][1] = 1; for(ll i = 0; i < n; i ++) { for(ll j = 0; j < 2; j ++) { ll now = arr[i][j]; if(now <= arr[i + 1][0]) { chkmin(dpLow[i + 1][0], dpLow[i][j]); chkmax(dpHigh[i + 1][0], dpHigh[i][j]); } if(now <= arr[i + 1][1]) { chkmin(dpLow[i + 1][1], dpLow[i][j] + 1); chkmax(dpHigh[i + 1][1], dpHigh[i][j] + 1); } } } if(!output(n - 1, n / 2)) { cout << -1 << endl; } return 0; }

컴파일 시 표준 에러 (stderr) 메시지

building4.cpp: In function 'int main()':
building4.cpp:48:3: error: 'in' was not declared in this scope; did you mean 'n'?
   48 |  }in
      |   ^~
      |   n