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poj 2353 Ministry

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poj 2353 Ministry

#include<iostream>#include<stdio.h>#include<map>#include<vector>#include<cmath>#include<string>#include<cstring>#include<set>using namespace std;#define N 1000005#define L(x) x<<1#define R(x) x<<1|1#define M(x,y) (x + y)>>1#define LL __int64#define inf 10000000000000Lstruct st{LL v;LL last;}dp[105][505];LL s[105][505],sum[105][505];int   main(){    LL  i,j,k,l,r;    LL  t,n,m;    while( scanf("%I64d%I64d",&n,&m) != EOF )    {for(i = 1;i <= n;i++){for(j = 1;j <= m;j++){scanf("%I64d",&s[i][j]);sum[i][j] = sum[i][j - 1] + s[i][j];}}for(i = 1;i <= m;i++){dp[1][i].v = s[1][i];dp[1][i].last = i;}for(i = 2;i <= n;i++){for(j = 1;j <= m;j++){dp[i][j].last = j;dp[i][j].v = dp[i - 1][j].v + sum[i][j] - sum[i][j - 1];}for(j = 2;j <= m;j++){if(dp[i][j].v > dp[i][j - 1].v + sum[i][j] - sum[i][j - 1]){dp[i][j].v = dp[i][j - 1].v + sum[i][j] - sum[i][j - 1];dp[i][j].last = dp[i][j - 1].last;}}for(j = m - 1;j >= 1;j -- ){if(dp[i][j].v > dp[i][j + 1].v + sum[i][j] - sum[i][j - 1]){dp[i][j].v = dp[i][j + 1].v + sum[i][j] - sum[i][j - 1];dp[i][j].last = dp[i][j + 1].last;}}}LL ans = 1;for(i = 1;i <= m;i++)if(dp[n][i].v < dp[n][ans].v)ans = i;vector<LL>num;for(i = n;i >= 1;i--){if(ans >= dp[i][ans].last)for(j = ans;j >= dp[i][ans].last;j--)num.push_back(j);elsefor(j = ans;j <= dp[i][ans].last;j++)num.push_back(j);ans = dp[i][ans].last;}for(i = num.size() - 1;i >= 0;i--)printf("%I64dn",num[i]);    }    return 0;}
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