Submission #1148966

#	Time	Username	Problem	Language	Result	Execution time	Memory
1148966		blackslex	Poi (IOI09_poi)	C++20	50 / 100	232 ms	16152 KiB

poi

#include<bits/stdc++.h>

using namespace std;
using tp = tuple<int, int, int>;

int n, m, p;

int main() {
    scanf("%d %d %d", &n, &m, &p); p--;
    vector<vector<int>> a(n, vector<int>(m));
    vector<int> cnt(m, n);
    for (auto &e: a) {
        for (auto &E: e) scanf("%d", &E);
    }
    for (int i = 0; i < m; i++) {
        for (int j = 0; j < n; j++) cnt[i] -= a[j][i];
    }
    vector<int> b(n), cnt2(n);
    vector<tp> c;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) b[i] += cnt[j] * a[i][j], cnt2[i] += a[i][j];
        c.emplace_back(b[i], cnt2[i], i);
    }
    sort(c.begin(), c.end(), [&] (const tp &p1, const tp &p2) {
        auto [x1, y1, z1] = p1;
        auto [x2, y2, z2] = p2;
        return (x1 == x2 ? (y1 == y2 ? z1 < z2 : y1 > y2) : x1 > x2);
    });
    int ans = -1;
    for (int i = 0; i < n; i++) {
        if (get<2>(c[i]) == p) ans = i;
    }
    printf("%d %d", get<0>(c[ans]), ++ans);
}

Compilation message (stderr)

poi.cpp: In function 'int main()':
poi.cpp:9:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 |     scanf("%d %d %d", &n, &m, &p); p--;
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
poi.cpp:13:31: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |         for (auto &E: e) scanf("%d", &E);
      |                          ~~~~~^~~~~~~~~~

• Subtask 1: 50 / 100