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54
LibreOJ/2600/2600.cpp
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54
LibreOJ/2600/2600.cpp
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#include <bits/stdc++.h>
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using std::cin;
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using std::cout;
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using std::endl;
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int n, m, l, r, w[200005], v[200005];
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long long s, y, sum, ans, fn[200005], fv[200005];
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std::pair<int, int> q[200005];
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bool check(int x) {
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y = sum = 0;
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fn[0] = fv[0] = 0;
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for (int i = 1; i <= n; i++) {
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fn[i] = fn[i - 1];
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fv[i] = fv[i - 1];
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if (w[i] >= x) {
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fn[i] += 1;
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fv[i] += v[i];
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}
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}
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for (int i = 1; i <= m; i++) {
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y += (fn[q[i].second] - fn[q[i].first - 1]) * (fv[q[i].second] - fv[q[i].first - 1]);
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}
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sum = std::abs(y - s);
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return y > s;
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}
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int main() {
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ans = std::numeric_limits<long long>::max();
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l = std::numeric_limits<int>::max();
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r = std::numeric_limits<int>::min();
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cin >> n >> m >> s;
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for (int i = 1; i <= n; i++) {
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cin >> w[i] >> v[i];
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l = std::min(l, w[i]);
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r = std::max(r, w[i]);
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}
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for (int i = 1; i <= m; i++) {
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cin >> q[i].first >> q[i].second;
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}
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l -= 1, r += 2;
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while (l <= r) {
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int mid = l + r >> 1;
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if (check(mid)) {
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l = mid + 1;
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} else {
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r = mid - 1;
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}
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ans = std::min(ans, sum);
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}
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cout << ans << endl;
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return 0;
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}
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