제출 #698875

#제출 시각아이디문제언어결과실행 시간메모리
698875dattranxxx캥거루 (CEOI16_kangaroo)C++11
51 / 100
811 ms524288 KiB
#include<bits/stdc++.h> using namespace std; using ll = long long; const int N = 505; int A[N][N][N], D[N][N][N]; const int M = 1e9 + 7; void add(int& x, int y) { x += y; if (x >= M) x -= M; } void sub(int& x, int y) { x -= y; if (x < 0) x += M; } int sum(int x, int y) { x += y; if (x >= M) x -= M; return x; } int dif(int x, int y) { x -= y; if (x < 0) x += M; return x; } int Asc(int i, int s, int t) { if (s == t) return 0; if (A[i][s][t]) return A[i][s][t]; if (s < t) { } } int n, s, t; int main() { cin.tie(0)->sync_with_stdio(0); cout.tie(0); cin >> n >> s >> t; A[2][1][2] = D[2][2][1] = 1; for (int i = 3; i <= n; ++i) { for (int t = 1; t <= i; ++t) { for (int j = 1; j <= i - 1; ++j) { add(A[i][1][t], D[i - 1][j][t - 1]); } for (int s = 2; s <= t - 1; ++s) { A[i][s][t] = dif(A[i][s - 1][t], D[i - 1][s - 1][t - 1]); D[i][s][t] = sum(D[i][s - 1][t], A[i - 1][s - 1][t - 1]); } for (int j = 1; j <= i - 1; ++j) { add(D[i][i][t], A[i - 1][j][t]); } for (int s = i - 1; s >= t + 1; --s) { A[i][s][t] = sum(A[i][s + 1][t], D[i - 1][s][t]); D[i][s][t] = dif(D[i][s + 1][t], A[i - 1][s][t]); } } } add(A[n][s][t], D[n][s][t]); cout << A[n][s][t]; return 0; }

컴파일 시 표준 에러 (stderr) 메시지

kangaroo.cpp: In function 'int Asc(int, int, int)':
kangaroo.cpp:22:1: warning: control reaches end of non-void function [-Wreturn-type]
   22 | }
      | ^
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