Submission #1030909

#	Time	Username	Problem	Language	Result	Execution time	Memory
1030909		coolboy19521	The Big Prize (IOI17_prize)	C++17	90 / 100	62 ms	596 KiB

prize

#include "prize.h"
#include "iostream"

using namespace std;

int find_best(int n) {
    int mx = 0;
    for (int i = 0; i < min(n, 500); i ++) {
        auto pr = ask(i);
        mx = max(mx, pr[0] + pr[1]);
    }
    int ls = 0;
    for (; ls < n;) {
        for (; ls < n; ls ++) {
            auto pr = ask(ls);
            int sm = pr[0] + pr[1];
            if (sm == mx) break;
            if (0 == sm)
                return ls;
        }
        int ps = ask(ls)[1];
        int rs = n;
        while (1 < rs - ls) {
            int mi = ls + (rs - ls) / 2;
            auto pr = ask(mi);
            int sm = pr[0] + pr[1];
            if (sm != mx) rs = mi;
            if (0 == ps - pr[1]) ls = mi;
            else rs = mi;
        }
        ls ++;
    }
    return 0;
}

• Subtask 1: 20 / 20
• Subtask 2: 70 / 80