Submission #62796

#TimeUsernameProblemLanguageResultExecution timeMemory
62796BBang3조화행렬 (KOI18_matrix)C++14
14 / 100
4017 ms4108 KiB
#include <cstdio> #include <algorithm> using namespace std; struct H { int a; int b; H() {} H(int a, int b) : a(a), b(b) {} bool operator < (const H &t) { return a < t.a; } }; int N, M; int arr[3][200000 + 5]; H matrix[200000 + 5]; int D[200000 + 5]; int main() { scanf("%d %d", &M, &N); for (int i = 0; i < M; i++) { for (int j = 1; j <= N; j++) { scanf("%d", &arr[i][j]); } } int ans = 1; if (M == 2) { for (int i = 1; i <= N; i++) { matrix[i] = H(arr[0][i], arr[1][i]); } sort(matrix + 1, matrix + 1 + N); for (int i = 1; i <= N; i++) { D[i] = 1; for (int j = 1; j < i; j++) { if (matrix[j].b < matrix[i].b) { D[i] = max(D[i], D[j] + 1); ans = max(ans, D[i]); } } } } printf("%d", ans); return 0; }

Compilation message (stderr)

matrix.cpp: In function 'int main()':
matrix.cpp:26:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &M, &N);
  ~~~~~^~~~~~~~~~~~~~~~~
matrix.cpp:32:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d", &arr[i][j]);
    ~~~~~^~~~~~~~~~~~~~~~~~
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