Submission #51801

#	Time	Username	Problem	Language	Result	Execution time	Memory
51801		evpipis	Popeala (CEOI16_popeala)	C++14	0 / 100	2074 ms	2012 KiB

popeala

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

typedef long long ll;
const int len = 2e4+5;
const ll inf = 1e15;
int po[len], can[55][len], n, s, t;
ll dp[len][55];

int val(int l, int r){
    int ans = 0;
    for (int i = 1; i <= n; i++)
        if (can[i][r]-can[i][l-1] == r-l+1)
            ans += po[r]-po[l-1];

    return ans;
}

int bs(int i, int x){
    int l = i, r = t, ans = -1;
    while (l <= r){
        int mid = (l+r)/2;
        if (val(i, mid) <= x*(po[mid]-po[i-1])){
            ans = mid;
            r = mid-1;
        }
        else
            l = mid+1;
    }

    return ans;
}

ll solve(int i, int rem){
    if (i == t+1 && rem == 0) return 0;
    if (i == t+1 && rem != 0) return inf;
    if (rem == 1) return val(i, t);
    if (dp[i][rem] != -1) return dp[i][rem];

    ll ans = inf;
    //for (int j = i; j <= t; j++)
      //  ans = min(ans, val(i, j) + solve(j+1, rem-1));

    for (int x = 0; x <= n; x++){
        int j = bs(i, x);
        //printf("i = %d, x = %d, j = %d\n", i, x, j);
        if (j != -1 && val(i, j) == x*(po[j]-po[i-1]))
            ans = min(ans, solve(j+1, rem-1) + val(i, j));
    }

    //printf("i = %d, rem = %d, ans = %lld\n", i, rem, ans);
    return dp[i][rem] = ans;
}

int main(){
    scanf("%d %d %d", &n, &t, &s);
    for (int i = 1; i <= t; i++)
        scanf("%d", &po[i]);
    for (int i = 1; i <= n; i++){
        scanf(" ");
        for (int j = 1; j <= t; j++){
            char temp;
            scanf("%c", &temp);

            if (temp == '1')
                can[i][j] = 1;
        }
    }

    /*for (int i = 1; i <= n; i++){
        for (int j = 1; j <= t; j++)
            printf("%d", can[i][j]);
        printf("\n");
    }*/

    for (int j = 1; j <= t; j++)
        po[j] += po[j-1];
    for (int i = 1; i <= n; i++)
        for (int j = 1; j <= t; j++)
            can[i][j] += can[i][j-1];

    for (int i = 1; i <= t; i++)
        for (int j = 0; j <= s; j++)
            dp[i][j] = -1;

    //for (int i = 1; i <= t; i++)
      //  for (int j = i; j <= t; j++)
        //    printf("(%d, %d) = %d\n", i, j, val(i, j));

    for (int j = 1; j <= s; j++)
        printf("%lld\n", solve(1, j));
    return 0;
}
/*
2 5 5
2 1 3 5 6
10010
11011
*/

Compilation message (stderr)

popeala.cpp: In function 'int main()':
popeala.cpp:56:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d %d", &n, &t, &s);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
popeala.cpp:58:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &po[i]);
         ~~~~~^~~~~~~~~~~~~~
popeala.cpp:60:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf(" ");
         ~~~~~^~~~~
popeala.cpp:63:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%c", &temp);
             ~~~~~^~~~~~~~~~~~~

• Subtask 1: 0 / 8
• Subtask 2: 0 / 9
• Subtask 3: 0 / 9
• Subtask 4: 0 / 74