제출 #79824

#제출 시각아이디문제언어결과실행 시간메모리
79824pzdbaDeda (COCI17_deda)C++14
0 / 140
167 ms3704 KiB
#include <bits/stdc++.h> using namespace std; typedef pair<int, int> pii; const int N = 200000; int st[4*N+5]; void update(int n, int s, int e, int idx, int v){ if(s == e) st[n] = v; else{ int mid = (s+e)/2; if(idx <= mid) update(n+n, s, mid, idx, v); else update(n+n+1, mid+1, e, idx, v); st[n] = min(st[n+n], st[n+n+1]); } } int query(int n, int s, int e, int l, int r, int y){ if(s > r || l > e) return 2e9; if(st[n] > y) return 2e9; if(l <= s && e <= r) return s; int mid = (s+e)/2; int q1 = query(n+n, s, mid, l, r, y); int q2 = query(n+n+1, mid+1, e, l, r, y); if(q1 == 2e9) return q2; return q1; } int main(){ int n, q; scanf("%d%d", &n, &q); for(int i=1;i<=n;i++) update(1, 1, n, i, 2e9); for(int i=1;i<=q;i++){ char s[2]; int x, a; scanf("%s%d%d", s, &x, &a); if(s[0] == 'M'){ update(1, 1, n, a, x); } else{ int y = x, b = a; int ans = query(1, 1, n, b, n, y); if(ans == 2e9) ans = -1; printf("%d\n", ans); } } }

컴파일 시 표준 에러 (stderr) 메시지

deda.cpp: In function 'int main()':
deda.cpp:27:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &n, &q);
  ~~~~~^~~~~~~~~~~~~~~~
deda.cpp:32:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%s%d%d", s, &x, &a);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~
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