http://poj.org/problem?id=2675 #include <stdio.h> #include <algorithm> #include <string.h> #include <math.h> const double eps = 1e-6; using namespace std; double v[70000]; int id[70000], s[70000], l[70000]; bool cmp( int a, int b ) { return v[a]*l[b] < v[b]*l[a]; } int main( ) { int i, n, a; while( scanf( "%d", &n ) == 1 ) { for( i=0; i<n; i++ ) { scanf( "%d%d%lf", id+i, l+i, v+i ); s[i] = i; } sort( s, s+n, cmp ); scanf( "%d", &a ); printf( "%dn", id[ s[n-a] ] ); } return 0; }
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