제출 #489632

#제출 시각아이디문제언어결과실행 시간메모리
489632YuisuyunoBalloons (CEOI11_bal)C++14
10 / 100
5 ms676 KiB
//Nguyen Huu Hoang Minh #include <bits/stdc++.h> #define sz(x) int(x.size()) #define all(x) x.begin(),x.end() #define reset(x) memset(x, 0,sizeof(x)) #define pb push_back #define mp make_pair #define fi first #define se second #define N 2005 #define remain(x) if (x > MOD) x -= MOD #define ii pair<int, int> #define iiii pair< ii , ii > #define viiii vector< iiii > #define vi vector<int> #define vii vector< ii > #define bit(x, i) (((x) >> (i)) & 1) #define Task "test" #define int long long using namespace std; typedef long double ld; const int inf = 1e10; const int minf = -1e10; int n; int x[N], r[N]; double R[N]; void readfile() { ios_base::sync_with_stdio(false); cin.tie(0);cout.tie(0); if (fopen(Task".inp","r")) { freopen(Task".inp","r",stdin); //freopen(Task".out","w",stdout); } cin >> n; for(int i=1; i<=n; i++){ cin >> x[i] >> r[i]; } } double check(int pos, int pre){ //(x[pre],R[pre]) //(x[pos],R[pos]) //dis*dis = (xpre-xpos)*(xpre-xpos) + (Rpre-R)*(Rpre-R) = Rpre^2 + 2*Rpre*R + R^2 //(xpre-xpos)*(xpre-xpos) = 4*Rpre*R double R_cur = (x[pre]-x[pos])*(x[pre]-x[pos])/4/R[pre]; return R_cur; } void proc() { R[1] = r[1]; for(int i=2; i<=n; i++){ double RR = r[i]; for(int j=1; j<i; j++){ double tmp = check(i,j); //cout << tmp << endl; if (RR>tmp){ RR = tmp; } } R[i] = RR; } cout << setprecision(3) << fixed; for(int i=1; i<=n; i++) cout << R[i] << '\n'; } signed main() { readfile(); proc(); return 0; }

컴파일 시 표준 에러 (stderr) 메시지

bal.cpp: In function 'void readfile()':
bal.cpp:37:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |         freopen(Task".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
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