제출 #200395

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
200395		quocnguyen1012	Sajam (COCI18_sajam)	C++14	90 / 90	30 ms	5244 KiB

sajam

#include <bits/stdc++.h>

#define fi first
#define se second
#define mp make_pair
#define pb push_back

using namespace std;
typedef long long ll;

const int maxn = 1005;

int a[maxn][maxn], cnt[2][maxn], N;
bool mark[2][maxn];
int sum = 0, K;

signed main(void)
{
  ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  if (fopen("A.INP", "r")){
    freopen("A.INP", "r", stdin);
    freopen("A.OUT", "w", stdout);
  }
  cin >> N >> K;
  for (int i = 1; i <= N; ++i){
    for (int j = 1; j <= N; ++j){
      char x; cin >> x;
      a[i][j] = (x == 'o');
      cnt[0][i] += a[i][j];
      cnt[1][j] += a[i][j];
      sum += a[i][j];
    }
  }
  if (sum <= K){
    cout << "DA";
    return 0;
  }
  for (int z = 1; z <= N; ++z){
    int type, mx = -1, ind;
    for (int t = 0; t < 2; ++t){
      for (int i = 1; i <= N; ++i){
        if (mx < cnt[t][i] && mark[t][i] == false){
          mx = cnt[t][i]; ind = i; type = t;
        }
      }
    }
    sum -= cnt[type][ind];
    cnt[type][ind] = N - cnt[type][ind];
    sum += cnt[type][ind];
    mark[type][ind] = true;
    if (sum <= K){
      cout << "DA";
      return 0;
    }
    if (type == 0){
      for (int i = 1; i <= N; ++i){
        cnt[1][i] -= a[ind][i];
        a[ind][i] ^= 1;
        cnt[1][i] += a[ind][i];
      }
    }
    else{
      for (int i = 1; i <= N; ++i){
        cnt[0][i] -= a[i][ind];
        a[i][ind] ^= 1;
        cnt[0][i] += a[i][ind];
      }
    }
  }
  cout << "NE";
}

컴파일 시 표준 에러 (stderr) 메시지

sajam.cpp: In function 'int main()':
sajam.cpp:21:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     freopen("A.INP", "r", stdin);
     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
sajam.cpp:22:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     freopen("A.OUT", "w", stdout);
     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
sajam.cpp:39:24: warning: 'ind' may be used uninitialized in this function [-Wmaybe-uninitialized]
     int type, mx = -1, ind;
                        ^~~
sajam.cpp:47:25: warning: 'type' may be used uninitialized in this function [-Wmaybe-uninitialized]
     sum -= cnt[type][ind];
            ~~~~~~~~~~~~~^

• Subtask 1: 15 / 15
• Subtask 2: 15 / 15
• Subtask 3: 15 / 15
• Subtask 4: 15 / 15
• Subtask 5: 15 / 15
• Subtask 6: 15 / 15