Submission #597845

#	Time	Username	Problem	Language	Result	Execution time	Memory
597845		yanndev	The Big Prize (IOI17_prize)	C++17	Compilation error	0 ms	0 KiB

prize

#include "prize.h"
#include <bits/stdc++.h>
using namespace std;

vector<int> ans[200042];

vector<vector<int>> query(int i) {
    if (ans[i].empty())
        return ans[i] = ask(i);
    return ans[i];
}

int find_best(int n) {
    for (int i = 0; i < n; i++) {
        vector<int> a = query(i);
        if (a[0] == 0 && a[1] == 0)
            return i;
        
        int l = i;
        int r = n;
        while (l < r) {
            int m = (l + r + 1) / 2;
            vector<int> b = query(m);
            if (b[0] == a[0] && b[1] == a[1])
                l = m;
            else
                r = m - 1;
        }

		//cout << "poor range " << i << ' ' << l << '\n';
        i = l
    }
}

Compilation message (stderr)

prize.cpp: In function 'std::vector<std::vector<int> > query(int)':
prize.cpp:9:23: error: could not convert 'ans[i].std::vector<int>::operator=(ask(int)())' from 'vector<int>' to 'vector<std::vector<int>>'
    9 |         return ans[i] = ask(i);
      |                ~~~~~~~^~~~~~~~
      |                       |
      |                       vector<int>
prize.cpp:10:17: error: could not convert 'ans[i]' from 'vector<int>' to 'vector<std::vector<int>>'
   10 |     return ans[i];
      |            ~~~~~^
      |                 |
      |                 vector<int>
prize.cpp: In function 'int find_best(int)':
prize.cpp:15:30: error: conversion from 'vector<std::vector<int>>' to non-scalar type 'vector<int>' requested
   15 |         vector<int> a = query(i);
      |                         ~~~~~^~~
prize.cpp:23:34: error: conversion from 'vector<std::vector<int>>' to non-scalar type 'vector<int>' requested
   23 |             vector<int> b = query(m);
      |                             ~~~~~^~~
prize.cpp:31:14: error: expected ';' before '}' token
   31 |         i = l
      |              ^
      |              ;
   32 |     }
      |     ~         
prize.cpp:33:1: warning: control reaches end of non-void function [-Wreturn-type]
   33 | }
      | ^