Submission #561606

#	Time	Username	Problem	Language	Result	Execution time	Memory
561606		PiejanVDC	Painting Squares (IOI20_squares)	C++17	Compilation error	0 ms	0 KiB

squares

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

vector<int>paint(int n) {
    int sz = 0, c = 0;
    vector<int>v(n+1);
    for(int i = 0 ; i < n ; i++) {
        if(c)
            v[i] = 0, c--;
        else
            v[i] = 1, c = ++sz;
    }

    int f = -1, s = -1;
    for(int i = n-1 ; i >= 0 ; i--) {
        if(v[i] == 1) {
            if(f == -1)
                f = i;
            else if(s == -1)
                s = i;
        }
    }

    v[n] = 2*(s - f + 1)+1

    return v;
}

int find_location(int n, vector<int>v) {
    for(int i = 0 ; i < n ; i++) {
        if(v[i] == -1) {
            return n - i;
        }
    }
    int f = -1, s = -1;
    for(int i = 0 ; i < n ; i++) {
        if(v[i] == 1) {
            if(f == -1)
                f = i;
            else if(s == -1)
                s = i;
        }
    }
    assert(f != -1 && s != -1);
    int len = s - f - 1;
    return (len * (len-1))/2 + len + 1 - f;
}


/*
//#include "squares.h"
#include <cstdio>
#include <cassert>
#include <vector>
#include <algorithm>

static int max_k = 0;
static int r, n, k, q, x;
static std::vector<int> labels, c, answers;

int main() {
	assert(scanf("%d", &r) == 1);
	for (int tc = 0; tc < r; tc++) {
		assert(scanf("%d%d", &n, &q) == 2);
		labels = paint(n);
		if ((int)labels.size() != n + 1) {
			printf("Number of labels not equal to %d\n", n + 1);
			exit(0);
		}
		for (int i = 0; i < n; i++) {
			if (labels[i] != 0 && labels[i] != 1) {
				printf("Label not 0 or 1\n");
				exit(0);
			}
		}
		k = labels[n];
		if (k < 0 || k > 1000) {
			printf("Label not in range 0 to 1000\n");
			exit(0);
		}
		if (k > max_k) {
			max_k = k;
		}
		for (int i = 0; i < q; i++) {
			assert(scanf("%d", &x) == 1);
			c.clear();

			for (int j = x; j < x + k; j++) {
				if (j >= n) {
					c.push_back(-1);
				} else {
					c.push_back(labels[j]);
				}
			}
			answers.push_back(find_location(n, c));
		}
	}
	printf("%d\n", max_k);
	for (int ans : answers) {
		printf("%d\n", ans);
	}
	exit(0);
}*/

Compilation message (stderr)

squares.cpp: In function 'std::vector<int> paint(int)':
squares.cpp:25:27: error: expected ';' before 'return'
   25 |     v[n] = 2*(s - f + 1)+1
      |                           ^
      |                           ;
   26 | 
   27 |     return v;
      |     ~~~~~~                 
squares.cpp:28:1: warning: no return statement in function returning non-void [-Wreturn-type]
   28 | }
      | ^