제출 #719565

#제출 시각아이디문제언어결과실행 시간메모리
719565vinnipuh01Stranded Far From Home (BOI22_island)C++17
컴파일 에러
0 ms0 KiB
#include <iostream> #include <bits/stdc++.h> #include <cmath> #include <algorithm> #include <vector> #include <deque> #include <set> #include <stack> #include <string> #include <map> #include <queue> #define int long long #define sqrt sqrtl using namespace std; const long long oo = 1000000000000000000; long long sum, ans = 0, mx = 0, mn = 1000000000, num, pos; /* ViHHiPuh (( `'-""``""-'` )) )-__-_.._-__-( / --- (o _ o) --- \ \ .-* ( .0. ) *-. / _'-. ,_ '=' _, .-'_ / `;#'#'# - #'#'#;` \ \_)) -----'#'----- ((_/ # --------- # '# ------- ------ #' /..-'# ------- #'-.\ _\...-\'# -- #'/-.../_ ((____)- '#' -(____)) cout << fixed << setprecision(6) << x; freopen ( "sum.in", "r", stdin ) */ int n, m, a[ 400001 ], x, y; int an[ 200001 ]; int p[ 400001 ], r[ 400001 ], c[ 400001 ]; int sz[ 400001 ]; vector <int> v[ 400001 ]; set <pair<int, int> > st; int used[ 400001 ]; bool ok1 = 1, ok2 = 1; queue <int> q; bool bfs( int u ) { st.clear(); st.insert( { 0, u } ); used[ u ] = 1; sum = a[ u ]; while ( st.size() ) { u = st.begin()->second; used[ u ] = 1; int cost = st.begin()->first; st.erase( st.begin() ); if ( sum < cost ) return false; sum += cost; for ( auto to : v[ u ] ) { if ( !used[ to ] ) st.insert( { a[ to ], to } ); } } return true; } void dfs( int u, int pr = 1, int sum = 0 ) { sz[ u ] += a[ u ]; for ( auto to : v[ u ] ) { if ( to != pr ) { dfs( to, u, sum ); sz[ u ] += sz[ to ]; } } } main () { ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0); cin >> n >> m; for ( int i = 1; i <= n; i ++ ) { cin >> a[ i ]; p[ i ] = i; r[ i ] = 1; c[ i ] = a[ i ]; st.insert( { a[ i ], i } ); if ( i > 1 && a[ i ] > a[ i - 1 ] ) ok1 = 0; } for ( int i = 1; i <= m; i ++ ) { cin >> x >> y; v[ x ].push_back( y ); v[ y ].push_back( x ); if ( x > y ) ok1 = 0; if ( abs( x - y ) != 1 ) ok2 = 0; } if ( n <= 2000 ) { for ( int i = 1; i <= n; i ++ ) { cout << bfs( i ); for ( int j = 1; j <= n; j ++ ) used[ j ] = 0; } } else if ( ok1 ) { dfs( 1 ); an[ 1 ] = 1; q.push( 1 ); while ( q.size() ) { int u = q.front(); q.pop(); for ( auto to : v[ u ] ) { if ( sz[ to ] > a[ u ] ) { an[ to ] = 1; q.push( to ); } } } for ( int i = 1; i <= n; i ++ ) cout << an[ i ]; return 0; } else if ( ok2 ) { l[ 1 ] = 0; p[ 1 ] = a[ 1 ]; a[ 0 ] = oo; for ( int i = 2; i <= n; i ++ ) { p[ i ] = p[ i - 1 ] + a[ i ]; l[ i ] = i - 1; sum = a[ i ]; while ( a[ l[ i ] ] <= sum ) { sum += p[ l[ i ] ] - p[ l[ l[ i ] ] ]; l[ i ] = l[ l[ i ] ]; } } r[ n ] = n + 1; sf[ n ] = a[ n ]; a[ n + 1 ] = oo; for ( int i = n - 1; i >= 1; i -- ) { sf[ i ] = sf[ i + 1 ] + a[ i ]; r[ i ] = i - 1; sum = a[ i ]; while ( a[ r[ i ] ] <= sum ) { sum += sf[ r[ i ] ] - sf[ r[ r[ i ] ] ]; r[ i ] = r[ r[ i ] ]; } } } }

컴파일 시 표준 에러 (stderr) 메시지

island.cpp:87:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   87 | main () {
      | ^~~~
island.cpp: In function 'int main()':
island.cpp:135:3: error: 'l' was not declared in this scope
  135 |   l[ 1 ] = 0;
      |   ^
island.cpp:148:3: error: 'sf' was not declared in this scope; did you mean 'st'?
  148 |   sf[ n ] = a[ n ];
      |   ^~
      |   st