제출 #518680

#제출 시각아이디문제언어결과실행 시간메모리
518680zhangjishenGlobal Warming (CEOI18_glo)C++98
100 / 100
128 ms7860 KiB
#include<bits/stdc++.h> using namespace std; template<typename T> bool chkmin(T &a, T b){return b < a ? a = b, 1 : 0;} template<typename T> bool chkmax(T &a, T b){return b > a ? a = b, 1 : 0;} typedef long long ll; const int MAXN = 2e5 + 10; int n, x, a[MAXN], b[MAXN], t, d[MAXN], f[MAXN], g[MAXN]; // fenwick tree struct BIT{ int c[MAXN]; void update(int i, int k){ for(; i <= t; i += i & -i) chkmax(c[i], k); } int qry(int i){ int ans = 0; for(; i; i -= i & -i) chkmax(ans, c[i]); return ans; } }c1, c2; int main(){ // input scanf("%d %d", &n, &x); for(int i = 1; i <= n; i++) scanf("%d", &a[i]); // disc for(int i = 1; i <= n; i++) d[i] = a[i]; sort(d + 1, d + 1 + n); t = unique(d + 1, d + 1 + n) - (d + 1); for(int i = 1; i <= n; i++) b[i] = lower_bound(d + 1, d + 1 + t, a[i]) - d; // dp for(int i = 1; i <= n; i++){ // update f f[i] = c1.qry(b[i] - 1) + 1; // update g chkmax(g[i], c2.qry(b[i] - 1) + 1); int m = lower_bound(d + 1, d + 1 + t, a[i] + x) - d; chkmax(g[i], c1.qry(m - 1) + 1); // update c1, c2 to [1, i] c1.update(b[i], f[i]); c2.update(b[i], g[i]); } int ans = 0; for(int i = 1; i <= n; i++) chkmax(ans, g[i]); printf("%d\n", ans); }

컴파일 시 표준 에러 (stderr) 메시지

glo.cpp: In function 'int main()':
glo.cpp:28:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   28 |  scanf("%d %d", &n, &x);
      |  ~~~~~^~~~~~~~~~~~~~~~~
glo.cpp:30:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |   scanf("%d", &a[i]);
      |   ~~~~~^~~~~~~~~~~~~
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